Nafta power catalog_sc_en_v01

S1 Series
Next generation 5, 10 and 15 kV
insulation resistance testers with high
noise immunity
OTS Series
Oil testing with a redesigned,
cleaner vessel
MRCT
Simultaneously tests all taps with a
single connection with single-phase
relay testing capability
VLF45
Very low frequency cable testing with
integrated tan delta measurement
The word ‘Megger’ is a registered trademark
Power testing engineered for the way you work.

2 Power Catalog www.megger.com/us 1-800-723-2861
Energy producers and suppliers are obliged to provide a high quality, reliable supply to their customers.
Asset reliability is increasingly important in today’s regulated energy markets, as when a fault arises, it costs
time and money.
As demand for energy increases, so does the strain on infrastructure. Electrical equipment maintenance relies
on good asset management and condition monitoring.
Megger has been providing electrical testers for the maintenance of electrical equipment for over 100 years.
Megger offers an extensive range of test equipment to analyze the condition of substation assets that
include all types of transformers, circuit breakers, protection relays and high voltage cables.
Megger has recently expanded its expertise with the
acquisition of SebaKMT and HDW cable test companies.
This brings considerable knowledge in the field of cable
insulation diagnosis and fault location.
Already known as experts in insulation testing, Megger
now has additional capabilities in insulation diagnostics,
which include VLF 0.1 Hz, both sine wave and cosine
rectangular methods, partial discharge detection and
mapping.
This compliments the current range of hand held
low voltage DC insulation testers, 5 and 10 kV
diagnostic instruments and other AC and DC testing
instrumentation, including 10 kV capacitance and tan
delta, and frequency domain spectroscopy (FDS). Megger
provides the most comprehensive insulation diagnostics
offer on the market today.
Widest Range of Products
Among our wide range of product
lines are battery, cable, circuit breaker,
ground-resistance, high-potential,
insulation-resistance, power factor,
recloser, relay, transformer and
watthour meter test equipment.
From test switches and terminal blocks
to computerized relay test systems,
Megger offers you the most choices
for innovative, problem solving test
and measuring equipment.
Sales and Service Worldwide
With sales offices and direct
representation in more than
100 countries, Megger is your
convenient, single source for electrical
test equipment and measuring
instruments.
Commitment to Excellence
Products from Megger meet the
highest standards for quality,
reliability and safety. It is our goal
to ensure every order is delivered
on time and performs to your
expectations. We pledge to respond
to your confidence in us by striving to
achieve your complete satisfaction.
Megger is a leading worldwide provider of test equipment and measuring
instruments for electric power applications.
Megger designs and manufactures more than 400 products under the brand names Megger and States®
. A subsidiary of
Megger, the AVO Training Institute offers electrical maintenance and safety training courses. AVO also provides electrical
engineering services and electrical safety services.
For pricing, product information, or technical support on any product in this catalog,
please contact us at:
1-800-723-2861 U.S.
1-800-287-9688 Canada
1-214-333-3201 Mexico
SebaKMT, a subsidiary of Megger, is a world leader
in cable fault location equipment. This equipment can
be stand-alone portable units or professionally fitted
into a test van vehicle. Cable test vans can be designed
to customer requirements to include a variety of test
equipment.
As the inventor of the insulation tester and multimeter,
Megger is well known for general electrical test
equipment. We are continually expanding our range, so
you will find many new types of test equipment in this
catalog.
Other Megger specialities include protection relay
testing, circuit breaker, transformer and battery testing.
Most Megger products interface with Megger’s PowerDB
software, a comprehensive test data management
program.
Look for the PowerDB symbol for products that
interface with PowerDB software.

1-800-723-2861 www.megger.com/us Power Catalog 3
Contents
AC hipot testing............................................................................................ 8
Battery testing ........................................................................................... 41
Cable fault locating .................................................................................... 13
Cable fault locating test vans.................................................................... 19
Cable locating and fault pinpointing........................................................ 18
Cable sheath fault locating........................................................................ 17
Circuit breaker analyzing .......................................................................... 25
Data collection/management software.................................................... 45
DC diagnostic insulation resistance testing................................................ 4
DC hipot testing............................................................................................ 6
Ground/Earth testing.................................................................................. 42
High current, low resistance testing ........................................................ 23
Low current, low resistance testing ......................................................... 21
Oil testing .................................................................................................. 40
Partial discharge detection and mapping................................................. 11
Power quality testing ................................................................................ 43
Primary current injection testing .............................................................. 27
Relay testing................................................................................................ 30
Time domain reflectometery...................................................................... 12
Transformer testing ................................................................................... 35
VLF & tan delta insulation testing............................................................... 9
Watthour meter testing ............................................................................ 44

DC diagnostic insulation resistance testing
Regular insulation resistance testing is one of the most cost effective, non-destructive
methods of identifying aging in electrical equipment. Over 60% of equipment failures are
attributed to insulation breakdown. Diagnostic DC testing is probably the easiest and most
convenient method of achieving this due to the small size and weight of the equipment.
High Performance
With its 8 mA noise immunity and 4 user-selectable filters, the
S1 series is able to provide stable measurements even in noisy
765 kV substations. The high 6 mA output current enables
quick charging of high capacitance apparatus and ensures that
the test voltage can be maintained even with high surface
leakage.
By extending the maximum test voltage to 15 kV, the S1-1568
allows compliance with NETA MTS-1997 and NETA ATS
2007 for medium-voltage motors, and IEC 60229 2007 for
electric cables with a special protective function. These are
the only instruments on the market capable of providing a
5% measurement accuracy up to 100 GΩ as specified by the
standards.
Always Safe
The S1-Series can be remotely operated via the isolated USB
interface to provide additional operator safety in high energy
locations where induced potential hazards might be present.
All test terminals on the 5 and 10 kV units have a CATIV 600 V
safety rating up to 3000 m in altitude while the 15 kV units are
CATIV 1000 V safety rated up to 4000 m.
Easy Testing
All units are preconfigured with diagnostic tests including
Polarization Index (PI), Dielectric Absorption Ratio (DAR),
Dielectric Discharge (DD), Stepped Voltage (SV) and Ramp test.
This allows even first time users to quickly become productive
with the instrument. Both digital and analog readings are
displayed on a large, backlit LCD display and the user can
easily toggle between different tests with the intuitive rotary
switch.
Fast Charging
The fast charge Li-ion battery can be fully charged in 2 hours
and the units can be powered through an AC source even
when the battery is flat. The battery is also designed to be
user-replaceable without voiding calibration.
Ultra Tough
The ultra-tough S1 series is built to work wherever you work.
All S1’s feature a dual case design – a flame retardant inner
case is protected by a tough outer shell that can withstand
rough knocks and drops, and keeps out moisture and dust
during storage and transport. It has been designed to provide
accurate insulation resistance measurements even in the most
extreme environments.
Smart Results
Test results, temperature and humidity measurements can
all be stored in memory, time/date stamped, and recalled to
the large LCD screen. Users can also use Bluetooth®
or USB
interface to transfer data to PowerDB, Megger’s advanced
data management software. PowerDB provides additional
functionality to S1 series users such as graphing measurements
in real-time and generating test reports.
Insulation resistance testers
S1 series
Megger S1 Series
For the past 80 years, Megger’s premium S1 series of insulation
resistance testers have offered the full range of features that
you have come to expect from high quality, utility grade
insulation testing equipment.
S1-568
Up to 5 kV test voltage, up to 15 TΩ resistance,
5 % accuracy up to 1 TΩ, CATIV 600V to 3000m
S1-1068
S1-1568

Test leads
Megger provides a range of lead
sets and clips of different sizes and
electrical characteristics for use
with Megger 5 kV, 10 kV and 15 kV
insulation resistance testers, enabling
the user to choose the most applicable
lead set for the work in hand.
The design of the lead sets is intended
to facilitate connection to a variety of
de-energized systems for the purpose
of making insulation resistance
measurements. Electrically isolated systems may exhibit
significant capacitance which will become highly charged
during the application of the insulation test. This charge
can be lethal and connections, including the leads and clips,
should never be touched during the test. The system must be
safely discharged before touching connections.

DC hipot testing
High voltage DC, or hipot testers, are sometimes known as overvoltage or withstand testers.
They are a convenient way to stress the insulation using above-rated voltages to identify
any weakness in the insulation and current leakage.
25 kV hipot
HV test set
HV series
This high voltage generator offers a variable DC output
voltage from 0 to 25 kV with an output current of 1.5 mA at
the maximum voltage. It is mains or battery powered, and
this combined with its low weight makes it ideal for field use.
The ground safety circuit and integrated discharge enhance
the operator’s safety.
50/80/110 kV hipots
This range of three high voltage test sets are designed for
the DC voltage testing of cables and cable installations in
accordance with the international standards. Each set consists
of a control unit and HV unit. These units are small and easily
transported.
40 kV hipot
T99/1
This high voltage test unit is
portable and powerful, able to
generate a DC voltage of up to
40 kV. It can be powered from an
external 12 V battery.
70/120/160 kV hipots
The 220000 series provides a
dependable, safe, and portable DC
voltage source for testing the quality
and integrity of electrical power cables,
cable installations, motors, switchgear,
insulators, transformers and capacitors.
Each test set comes in two units,
the high voltage unit
and the controller.
220000 series
has advanced
performance with
long-term reliability
provided by filtered
half-wave rectification
For vacuum bottle testing, see VIDAR on page 26.
220000 series

200/400/800 kV hipots
HVDC series
These high voltage test sets are mobile systems for high
voltage testing of cables, cable systems and installations as
required by current regulations (VDE) with DC voltages of
up to 400 kV, 650 kV and 860 kV respectively. The sets are
suitable for installation into trailers and on-site testing as
stationary test set. The spatial separation of the operating
and high voltage units makes it possible to operate the sets
from outside the immediate danger area. Their modular
structure makes them easy to set up. These units are primarily
designed for power supply companies, cable laying firms and
cable manufacturers
for the DC voltage
testing of high-
voltage systems
and cables. Their
short-circuit-
proof output
circuit and high
power make
them suitable
for use in fault
location as a
burn-down
unit for
burning high-
impedance and
intermittent
cable fault.
70 kV hipot
HPG70-K
A fully insulated test set for DC testing up to 70 kV, this
system is ideal for stand-alone applications. The DC voltage
is obtained through a bridge rectifier which ensures a very
low test voltage ripple. Moreover, the DC voltage is measured
on the output side, thus ensuring a precise output voltage.
Applications include testing of cables, switchgears, current-
transformers, medium voltage plants and components.
DC output 400 kV 800 kV 0 to 70 kV 0 to 120 kV 0 to 160 kV 0 to 70 kV
Continuous output current 4 mA 2 mA 3.5 mA 2.5 mA 2 mA 10 mA
Short circuit current output 300 mA 55 mA
Power Line Line Line Line
Weight 23.1 + 44 lbs 23.1 + 66.1 lbs 23.1 + 72.7 lbs 39.6 + 45.1 lbs
DC output 0 to -25 kV 0 to 50 kV 0 to 80 kV 0 to 110 kV 0 to 40 kV 200 kV
Continuous output current 1.5 mA 6 mA 5 mA 4 mA 2.5 mA 9 mA
Short circuit current output 300 mA
Power Line | Battery Line Line Line Line | Battery
Weight 29.7 lbs 28.6 + 37.4 lbs 28.6 + 40.7 lbs 28.6 + 44 lbs 33 lbs
Ground sticks: Test apparatus should be discharged with a
suitably rated high voltage discharge stick following a test.
Model HV tester 25 kV HV test set 50 kV HV test set 80 kV HV test set 110 kV T99/1 HVDC 200 kV
Model HVDC 400 kV HVDC 800 kV 220070 220123 220163 HPG70-K
For the full range of
discharge sticks, visit our
website or contact our
sales office.

AC output in kV 0 - 35 0 - 50 0 -58 0 - 78 100 0-75 0- 35 0 - 50 0-58 0- 35 0- 50 0- 58 0- 78
expandable 150
DC output in kV with accessories 130 80 0 - 100 0 -140 0 -150 0-50 0 - 70 0 - 80 0 - 110
output in KVA 1.2 1.2 1.2 1.2 5 1 1.2 1.2 1.2 1.2 1.2 1.2 1.2
Model HPA35 HPA50 HPA58 HPA78 HPA100AC T22/1 HPG50-D HPG70-D HPG80-D HPG50-H HPG70-H HPG80-H HPG110-H
HPA130DC
AC hipot testing
35/50/58/78 kV hipot
HPA series
Capable of testing to 35 kV
AC, 50 kV AC, 58 kV AC, and
78 kV AC , these test sets are
suitable for testing items with
low capacity. They are a two
piece design consisting of a
control unit and a resin-cast
HV unit.
100 kV hipot
HPA100AC
This powerful unit offers
continuous testing with AC
voltages up to 100 kV at
5 kVA. The unit has been
designed for mounting in
cable test van and can be
used for testing cable systems
and for burning down high-
resistance cable faults with
a high breakdown voltage.
The test set can be equipped with the HPA 130 DC rectifier
accessory for DC testing up to 130 kV.
The intrinsic noise-level of the test system is below 1%, so it is
also suitable as a voltage source for PD measurements.
70/150 kV hipot
T22/1
This system features a two piece design and offers
continuously variable test voltages up to 75 kV.
Its performance is expandable to 150 kV AC
by the addition of a second transformer.
It features built-in
overload protection.
The test set can be
equipped with a
rectifier accessory
for DC testing
up to 80 kV.
30/50/58 kV AC/DC hipot
HPG D series
These two unit test sets are
capable of testing to
35 kV AC/100 kV DC,
50 kV AC/140 kV DC,
and 58 kV AC/150 kV DC
respectively.
These voltages are
continuously adjustable
with a continuous output
of 1.2 kVA and up to
3 kVA for 60 minutes. The
separation between the
HV units and the controller
units contribute to the ease
of operation.
50/70/80/110 kV AC/DC hipot
HPG H series
The two-unit test sets are capable of
testing to 35 kV AC /50 kV DC, 50 kV
AC/70 kV DC, 58 kV AC/80 kV DC, and
78 kV AC/110 kV DC respectively. These
voltages are continuously adjustable
with a continuous output of 1.2 kVA
and up to 3 kVA for 60 minutes.
AC insulation testers most closely replicate the normal operating condition for a substation
asset. Consequently, they provide the most accurate indication of the insulation condition.
A stepup transformer is required for use on 120 V 60 Hz
systems. Available as an optional accessory.

VLF CR series
VLF & tan delta insulation testing
VLF or Very Low Frequency (VLF) 0.1 Hz testing is used on cables as an alternative to DC
testing. It is designed to test the cable for weak spots due to electrical trees in the insulation.
Cosine rectangular 0.1 Hz systems have been developed to meet international standards such
as IEC HD 620/621 and IEEE 400. The benefit of the cosine rectangular waveform is that you
can test longer cables to the standards of 0.1 Hz.
Many of our VLF test systems also feature DC and pulsed DC outputs to enable sheath
testing and sheath fault pinpointing using the ESG NT. See page 17.
20 kV rectangular test set
Easytest 20 kV
The Easytest is a
simplified version
of the standard
rectangular VLF test.
Typically, a test
is performed in
accordance with
company specifications
after repairs or after
a new cable has been
installed.
28/40/60 kV VLF cosine rectangular test systems
This range of insulation testers combine VLF, DC and sheath
fault testing into one unit. The cosine rectangular waveform
at 0.1 Hz is ideal for longer cable runs where true sine wave
VLF sets may have to reduce the test frequency to levels not
compliant with the standards (<0.1 Hz). With a range of up
to 13.6 miles depending on model, these testers have a high
test capacitance capability, an integrated discharge system
and benefit from two module design. Cosine rectangular
waveform also allows leakage current measurement. Winkis
VLF software allows all test results to be logged. There is an
optional tough transit case for off-shore use.
60/80 kV cosine rectangular test set
Powerful cosine rectangular wave form 0.1 Hz testers, testing
to 60 kV and 80 kV. With built–in breakdown detection and
leakage current measurement, these systems are ideal for use
in off-shore situations or for long underground cables.
VLF CR HP series

34 kV sine wave test set
VLF Sine Wave 34
For those who want to test
with 0.1 Hz sine wave, the
tough and portable VLF Sinus
34 kV is an ideal test system
for medium voltage cables.
It is air cooled so it can be
used continuously. The system
is easy to use, thanks to its
single-button operation and
clear, simple menu structure
and color display. In addition
to sine wave AC, its output
voltage shapes also include
positive and negative DC,
square wave and pulsed DC
for sheath-fault pinpointing.
There is a tan delta accessory available.
Tan delta attachment
This accessory allows the
precise determination of
the condition of a cable,
identifying aging effects
such as the degree of
humidity and water treeing.
It is used in combination
with the VLF sine wave
systems.
45 kV sine wave test set with tan delta
VLF Sine Wave 45
Test voltage VLF test voltage 0 ... 20 kV peak 0 ... 28 kV eff 0 to 40 kV eff 0 to 40 kV eff 0 to 60 kV eff 0 to 60 kV eff
frequency 0.01 to 0.1 Hz 0.1 Hz 0.1 Hz 0.1 Hz 0.1 Hz 0.1 Hz
wave form Simplified rectangular cosine rectangular cosine rectangular cosine rectangular cosine rectangular cosine rectangular

Testing cable capacitance (at max. voltage) 0,5μF(0.1 Hz)/ 5 µF 2.4 µF 4.8 µF 1 µF 2 µF
5μF(0.01 Hz)
DC 0 … 20 kV 0 to -28 kV 0 to -40 kV 0 to ±40 kV 0 to -60 kV ± 0 to ±60 kV
Output current measurement 0 … 50 mA 0 to 12 mA 0 to 7 mA 0 to 7 mA 0 to 5 mA 0 to 5 mA
Sheath testing 0 to 5 kV or 0 to 10 kV 2 to 10 kV 2 to 10 kV 2 to 10 kV 2 to 10 kV 2 to 10 kV
Sheath pinpointing Test voltage 0 to 5 kV or 0 to 10 kV 2 to 10 kV 2 to 10 kV 2 to 10 kV 2 to 10 kV 2 to 10 kV
Pulse rate 01:03 1:3, 1:4 or 1:9 1:3, 1:4 or 1:9 1:3, 1:4 or 1:9 1:3, 1:4 or 1:9 1:3, 1:4 or 1:9
Weight 37.4 lbs 55 + 55 lbs 121.2 + 105.8 lbs 121.2 + 105.8 lbs 187.3 + 105.8 lbs 187.3 + 105.8 lbs
Model Easytest 20 VLF CR 28 VLF CR 40 Basic VLF CR 40 Plus VLF CR 60 Basic VLF CR 60 Plus
Test voltage VLF test voltage 0 to 60 kV rms 0 to 80 kV rms 0 to 80 kV rms 0 to 34 kV peak 0 to 45 kV peak 0 to 54 kV peak
frequency 0.1 Hz 0.1 Hz 0.1 Hz 0.01 to 0.1 Hz 0.01 to 0.1 Hz 0.01 to 0.1 Hz
wave form cosine rectangular cosine rectangular cosine rectangular Sine Sine Sine
Testing cable capacitance (at max. voltage) 6.5 µF 2.0 µF 2.5 µF 0.6 μF(0.1 Hz)/ 0.6 µF 1 µF(0.1 Hz)/
5 μF(0.01 Hz) 5 µF(0.01 Hz)
DC 0 to ±60 kV 0 to - 80 kV 0 to ± 80 kV 0 to ± 34 kV 0 to ± 45 kV 0 to ± 54 kV
Output current measurement 0 to 17 mA -12.5 mA ±12.5 mA 0 to 14 mA 0 to 20 mA 0 to 35 mA
Sheath testing 0 to 10 kV 0 to 10 kV 0 to 10 kV 0 to 5 kV or 0 to 10 kV 0 to 5 kV, 10 kV, 20 kV 0 to 5 kV or 10 kV
Sheath pinpointing Test voltage 0 to 10 kV 0 to 10 kV 0 to 10 kV 0 to 5 kV or 0 to 10 kV 0 to 5 kV, 10 kV, 20 kV 0 to 5 kV or 10 kV
Pulse rate 1:3, 1:5 or 1:9 1:3, 1:5 or 1:9 1:3, 1:5 or 1:9 1:3 or 1:4 1:3 or 1:4 1:3 or 1:4
Weight 837.7 lbs 837.7 lbs 837.7 lbs 55.1 lbs 110.2 lbs 242.5 lbs
Model VLF CR 60 VLF 80 base VLF 80 plus VLF Sinus 34 VLF Sinus 45 VLF Sinus 54
VLF sine wave series accessory
With a choice of
0.1 Hz and 0.01 Hz
testing frequency,
this test system
outputs a sine
waveform of test
voltage between
0 and 45 kV peak
for testing medium
voltage cables.
The optional
internal tan delta
allows users to
do condition
assessment on
cables.
VLF & tan delta insulation testing

Pinpointing system
PD LOC
The PD LOC system solves the problem of pinpointing for
mixed cables (XLPE/PILC) and for PD in joints of single
core cables. In the field the exact location of the joints is
not generally known, and these joints cannot be localized
using audio frequency methods. This system has an impulse
transmitter that uses an inductive coupler to inject a signal
into the cable. The receiver and evaluating unit consists of an
input amplifier for processing the signal and a control unit
in a single case. The visualization of the distance system’s
transmitter location is performed by using a TDR in a separate
menu, by means of an additional PD software function.
Partial discharge detection and mapping
Partial discharge detection and mapping are powerful techniques to diagnose the condition
of a cable network and to predict where faults are likely to occur. By allowing the
replacement of damaged cable in advance of failure, it prevents power users losing supply
unexpectedly. These compact systems measure partial discharge at points along a cable using
the damped AC method (DAC).
Partial discharge detector
TE PDS
This provides an inductive and capacitive sensor for quality
assessment by detecting partial discharge in joints and
terminations of HV insulated cables.
TDS NT series
The TDS NT consists of a multifunctional, compact voltage
source and a PD detector. The TDS NT can be used to test
cables with a powerful VLF-CR voltage as per international
standards (IEC, IEEE). In addition, using the PDS 60 PD
detector a PD diagnosis can be performed. Alternatively,
the TDS NT can be used for a PD diagnosis with the proven
damped AC test voltage (DAC).
The innovative evaluation algorithm enables reliable
detection and precise location of partial discharges (PD
mapping) while the actual measurement is taking place. The
time consuming, post processing of data is not needed and
direct measures can be planned based on the outcome of the
data. The TDS NT is available in four different models, two
40 kV and two 60 kV versions. The set consists of a power
source, pd detector, pd calibrator, laptop, SW license and all
cables.
Test and diagnostic system
PD Detector

Teleflex VX is specially designed
to measure the fast processes
during fault location in power
cables. The new hardware
with significantly improved
specification such as sampling
frequency, pulse width and pulse
amplitude, offers longer range,
higher resolution and above all,
improved measurement.
When used with a surge
generator the ΔU trigger
technology always provides the
perfect trigger timing. The ARMslide records 15 traces in one
shot and allows the selection of the best trace, especially for
wet and long cables. The ProRange function allows range-
based gain adjustment, displaying distant reflections with
the same amplitude as those from short distances. With its
large bright color display, the Teleflex VX is operated using
a standard jog dial rotary controller, common to the Teleflex
range.
The USB interface enables a very easy data transfer either
as PDF files, as data set to the Winkis database software or
directly to a printer.
Time domain reflectometery
A well-established technique for fault location in both high and low voltage cables, time
domain reflectometery has been explained as radar for cable. The reflected wave will show
you the distance to the fault. These TDRs can be used with surge generators to form a
complete cable fault location system.
19 mile range TDR
Teleflex T3090
This tough battery or line operated
reflectometer can be used stand-alone
or with a surge generator for ARM,
ICE and voltage decay fault location
methods, the latter pair extending
the range up to 18.9 miles. There is a
choice of three menus to operate it,
from “EasyGo” mode with automatic
operation and measurement through,
to a customizable expert mode.
100 mile range TDR
Teleflex SX
With a range of 65 ft to 99.5
miles, Teleflex SX is a powerful
TDR. It is easily operated using the
touch screen and control knob. It
automatically analyzes the trace
to give the cable end and fault
distance indication. It supports all
existing pre-location technologies
and is compatible with all HV fault
location systems.
795 mile range TDR
Teleflex VX
Range 39 ft to 795 miles 65 ft to 99.5 miles 33 ft to 18.9 miles 328 ft to 34 miles
Output pulse 30 to 160 V 5 to 50 V 35 V 25 V
Pulse width 20 ns to 10 μs 20 ns to 10 µs 35 ns to 4 µs 50 ns to 10 µs
Velocity factor range 3 to 50 % 3 to 50 % 16 to 50 % 30 to 99 %
Resolution 0.1 m 0.1 m 0.8 m 0.82 m
Weight 44 lbs 2.2 lbs 13.2 lbs 14.7 lbs
Model Teleflex VX-P TeleflexSX TeleflexT3090 MTDR300
34 mile range TDR
MTDR300
The three-phase MTDR300 has a
range of 328 ft to 34 miles, is
designed to rapidly and accurately
pre-locate faults in power cable
networks. Operation is via a single
jog-dial and an easy-to-use menu
with pull-downs. All the operator
has to do is select the operation
and click to confirm.
The MTDR300 is available as part
of a Megger CFL or PFL system
and as a stand-alone unit, housed
in a rugged field proven case.

Cable fault locating
The fundamental objective of any cable fault location system is to provide quick, effective,
accurate and safe fault location, to reduce system outages and and downtime. Most cable
fault locating systems feature high potential and arc reflection methods of fault prelocation,
and high surge energy for fault pinpointing.
4/12 kV system
EZ-Thump series
Weighing less than 78 lbs, the EZ-Thump series is the most
portable fault location system on the market. It utilises the
“EasyGo” test system, which is easy to operate, interprets the
results and requires minimal training to operate. On-board is
a TDR with a
4.7 mile range and arc
reflection at 4 or
12 kV respectively
for pre-locating. For
pinpointing, the
EZ-Thump offers a surge
energy of 500 J. It also
performs DC testing of
breakdown detection
and insulation resistance
measurement. The units
are operated from main
or internal battery. They
are small, making them
ideal for a flexible quick
response fault finding
strategy.
8/16 kV system
ST16
This compact system can be powered by on-board batteries
or mains supply. It utilizes the EasyGo test system, which is
easy to operate, interprets the results and requires minimal
training to operate. Proof test at 8 or 16 kV, surge energy
1500 J, the unit features ICE, ARM, decay and sheath test
modes.
EZ-Restore Overdrive
The EZ-Restore Overdrive features a 1100 J
output at 12 kV. There is an optional 12 kV
DC output module with this unit to indicate
breakdown voltage. Possessing a measuring
range up to 25,000 feet, the EZ-Restore
Overdrive offers fault-distance accuracy down
to 2.5 feet (depending on displayed range).
Additionally, the system allows for computer-
controlled automatic sectionalizing and
fault locating with a simple “turn and click”
operation.
Sectionalizer/power restoration tool

20 kV system
PFL22M1500
This tough, portable system
offers cable and fault
diagnosis, pre-location,
fault conditioning and pin-
pointing using the acoustical
method. There is a 20 kV
output for insulation testing
and proof/burn. The surge
energy is 1550 J at 8 or
16 kV. The TDR has a range
of 328 ft to 34 miles.
32 kV system
PFL32M1500
The PFL32M1500 performs DC
insulation testing up to 32 kV.
The unit offers 16 kV and 32 kV
arc reflection with 1500 J surge
output, ARM plus, differential
ARM and impulse current and
pulse echo modes of fault
prelocation.
The unit incorporates Megger’s
newest TDR, the MTDR300. The
MTDR300 offers auto ranging,
a comprehensive cable library
and is user friendly with a single
selection knob.
15/25/32/40 kV system
SFX series
The SFX series is a mobile system for testing and fault
locating on low and medium voltage cables. The test and
surge voltages can be up to 32 kV. The Short Period ARM is
used for prelocation of high resistance faults up to 32 kV,
while low resistance faults can be located with the Teleflex
Teleflex-SX TDR module without recourse to high voltage
methods. The burning of faults is possible at all voltage levels
by short-term burning.
1750 J with a vehicle
mounted option of
3500 J of surge energy
provide the necessary
high power for fast and
accurate pinpointing
of cable faults by the
acoustic method.
Max output voltage 0 to 4 kV 0 to 12 kV 0 to 5 kV 2, 4 and 8 kV 8 and 16 kV 10 and 20 kV 16 and 32 kV 7.5 and 15 kV 12.5 and 25 kV 0 to 30 kV 40 kV
Surge energy output 500 J 500 J 1000 J 1000 J 1500 J 1500 J 1500 J 1150 J 1150 J 1750 J 1000 J
TDR range 4.7 miles 4.7 miles 100 miles 4.6 miles 34 miles 34 miles 100 miles 100 miles 100 miles 100 miles
Pre-location method ARM n n n n n n n n n n
ICE n n n n n n n n n
Decay n n
Insulation n n
Fault conditioning n n n n n n n
Proof/burn n n n n n n n
Pin-pointing n n n n n n n n n n n
Sheath fault n n n n n
Mains operation n n n n n n n n n n n
Battery operation n n n n n
Width 1 ft 1 ft 1.7 ft 1.7 ft 1.6 ft 1.7 ft 1.7 ft 1.9 ft 1.9 ft 2.6 ft 1.7 ft
Weight 72.7 lbs 72.7 lbs 99.2 lbs 198.4 lbs 297.6 lbs 288.8 lbs 288.8 lbs 242.5 lbs 242.5 lbs 308.6 lbs 255.7 lbs
Model EZ-thump4 EZ-thump12 SPG5-1000 SFX8-1000 ST16 PFL22M1500 PFL32M1500 SFX15 SFX25 SFX32 SFX40

40 kV system
SPG40
The SPG 40 is a mobile, multi-
functional system for
testing, prelocation,
pinpointing and burning
cable faults in low and
medium voltage networks.
The system is controlled
directly via the connected
Teleflex reflectometer or
the integrated control
panel. All functions of
the system can be easily
accessed using the selector
knob. With DC output
up to 40 kV and surge
energies of 1000 J or 2000 J,
this is a powerful system. The
integrated safety system ensures
the highest degree of safety.
High powered surge wave generator
SWG1750 series
Available as a single or two unit system, the SWG1750 can
generate surge energies of 1750 J for the single unit system
and 3500 J for the two unit system. The output voltages are
8 to 32 kV.
Burner and proof test system for medium
voltage cables
BPS5000-D
The BPS5000-D system is
typically van mounted,
but is also available as
stand-alone version for
burning and testing of
difficult to locate cable
faults. It can be used to
operate a connected HV
DC test system and a VLF
cosine rectangular test
system. It can generate
a DC burn current up
to 6 A and an AC burn
current up to 110 A. It
can also perform sheath
fault location when used
with the ESG NT.
Mobile power source
MPS
The MPS is a portable field proven
mobile power supply, for use when
there is no suitable mains or generator
supply available. The MPS is a practical
alternative where a pure sinewave with
a low THD is required. The Megger
family of PFL Cable Fault Location
Systems, require such a pure sinewave
source.
The MPS is suitable for powering any
Megger instrument, especially those that
benefit from a stable portable power
supply. Typically PFL’s, DC HiPots, TTR’s
and similar equipment.

Arc reflection adapter
M219
The Arc Reflection Adapter M219 is used for fault location on
low-, medium- and high-voltage cables. The M219 causes a
low resistive arc at the fault spot. At the same time the M219
also protects the reflectometer from the high voltage in
the cable.
Cable fault burner
BT500-IS-1
For converting high resistance
faults in signal, control and
telecommunication cables into
low resistance faults.
DC earth fault locator
Geolux GL660-1
This unit is designed for
fault location in isolated,
earth free IT and similar
systems up to 660 V DC/
AC. The GL660 directly
connects to the faulty
line with live voltages up
to 660 V, and generates
a low frequency pulsed
signal which allows the
tracing by a specific
receiver along the faulty
line to the fault position.
A single earth fault will cause no service interruption.
However, with the occurrence of a second earth fault there
is a high risk of partial or complete breakdown of the
installation. Consequently any earth fault must be located
and repaired as fast as possible. The GL660-1 can locate faults
up to 150 kΩ even in noisy environments and without the
need to switch off the system.
Impedance meter
NIM1000
With a test current of up to 1 kA, the NIM1000 measures the
network impedance of the phase and neutral conductors to
the 10th
harmonic. It highlights load-sensitive and neutral
faults, detects poor contacts and unseen problems. It is also
useful for measuring the earth loop impedance close to the
source of supply.

Electromagnetic impulse detector
651113
The electromagnetic
detector system
is used primarily
to localize faults
on cable buried in
conduit. It may also
be used to localize
faults on non-buried
and direct-buried
cable.
When used with the optional surface coil, it is also possible
to trace cable. When used with the optional earth frame, it is
possible to pinpoint faults on direct-buried cables.
Sheath fault pinpointer
ESG NT
Used with any DC or pulsed DC sheath test output such as
from the MFM10 or MMG10 as a transmitter, the ESG NT
pinpoints a sheath fault using the step voltage or pool of
potential technique. The easy-to-use instrument utilizes a TFT
color display which is very readable in bright sunlight and has
auto or manual sensitivity adjustment. The display can show
a simple digital bar graph, or show the deflections of the last
7 pulses. A fully automatic calibration keeps the error always
at zero and the integrated noise suppression eliminates all
influences by DC, railway currents, industrial plants and high
resistive soil environments. The step voltage is measured
using two earth rods.
Dual polarity 10 kV system
MFM10
This is a highly portable system enclosed in an IP53 wheeled
case. Automatic measurement enables the testing of cable
sheaths as well as the pre-location
and pin-pointing of cable sheath
faults. A single test lead makes
connection easy and the unit
will test its own connections for
pre-location. The sheath fault
pre-location method is automatic,
the operator only has to enter
the overall cable length. The
±10 kV DC output permits the
testing of HV cables. The bipolar
function eliminates the external
thermoelectric and galvanic effects
on pre-location considerably
enhancing the accuracy.
10 kV system
MMG10
Designed for the voltage
testing of PE and PVC cables
and the location of sheath
faults in shielded plastic
cables in conjunction with a
pin-pointer.
Cable sheath fault locating
Dual polarity 10 kV system high voltage
bridge for fault location in long cables
HVB10
HVB10 is a highly accurate
high voltage bridge designed
to locate cable and sheath
faults, perform sheath testing,
and pinpoint sheath faults. It
is especially suited to long HV
cables. With its high resolution,
intermittent fault detection
function, and load adaptation
for faster cable charging, it is
an indispensable tool.
It accurately pre-locates cable
interruptions and short-circuit
faults, and detects high-resistance conductor faults that
cannot be pre-located with impulse reflection based methods.
The HV bridge is equipped with a powerful discharge unit
which allows the safe discharge of cables with a capacity
of up to 25 µF. Prior to each test, a capacity measurement
ensures that the expected discharge energy does not exceed
these parameters and damage the instrument, making it very
suitable for very long cables.

Utility services locator
Easyloc
A fast and easy-to-use system for the detection and tracing
of underground cable runs and pipe networks. The receiver
unit displays the signal level and has automatic sensitivity
control to help with location. The operator is given both
audio and visual confirmation of location. Easyloc also gives
an approximate depth measurement.
Cable identifier
CI
The CI identifies a particular cable by means of a current
impulse generator and receiver. The receiver is connected to a
flexible CT or a pad style detector to receive the identification
signal. The pulse
generator transmits a
single sawtooth pulse
with a peak current up
to 100 A into the cable
being identified. Special
software controls and
verifies all parameters
of the received pulse.
Medium voltage cable phase identifier
PIL 8
The PIL8 uses three pairs of transceiver clamps connected
without any leads, one to each of the short circuited phases.
The transceiver clamps do not require a power supply. At the
other end of the cable an audio frequency current is injected
into the cable by means of a battery operated generator/
receiver. This induces a voltage in the transceiver clamps
which is rectified and stored in a capacitor. When sufficiently
charged the clamp transmits a coded signal to the receiver
indicating the designated phase to which the pairs of clamps
has been connected.
Acoustic and electromagnetic
surge wave receiver
digiPHONE+
This instrument sets the standard by integrating audio and
electro-magnetic functionality into one simple to understand
unit. Combining two new technologies for efficient noise
suppression, it offers exceptional acoustic performance which
filters the fault noise. This means it is possible to lower the
surge energy and find faults in noisy environments. The
operator’s hearing is protected by auto proximity mute,
turning off the head set as a hand approaches the sensor
handle and turning it on again once mechanical oscillations
have ceased, and limiting the earphone output to 84 db(A).
Cable tracing is simplified using the left right indicator
keeping the sensor over the cable while the compass
indicates the direction to the fault and the color display
shows the distance to the fault.
Cable locating and fault pinpointing
These are used in conjunction with a surge generator or sheath fault locator pulsed energy
source to find the exact location of a fault.
The PIL 8 meets the requirement of EN50110-1 (VDE0105part1),
because its application eliminates the need to disconnect the
short circuiting and earthing circuit. After installation of the
three pairs of clamps, the switchgear chamber can be closed,
greatly enhancing safety.

Cable fault locating test vans
SebaKMT, a subsidiary of Megger, is a world leader in cable fault location equipment. This
equipment can be stand-alone portable units or professionally fitted into a test van vehicle.
Cable test vans can be designed to customer requirements to include a variety of test
equipment.
Fully integrated single- or three-phase cable fault location van
Centrix
The Centrix system is an all-in-one, multi-function cable fault
location solution mounted in a test van. It has a single, easy
to use controller that operates the whole system from the
comfort of the operators cabin. All functions are accessed via
the central, jog dial operated control unit, from insulation
tests, to VLF, TDR reference traces to the various cable fault
methods such as ARM and ICE. All tests and system status are
shown on a high resolution color display allowing instant
analysis of fault traces which can be saved into the memory
or a USB stick and downloaded for comparison later. Each
system is configured to customer requirements, including
options for cable test and diagnosis.
The simple single jog dial operation makes the Centrix
system easy to use and to understand which reduces the
training time and effort required learning the operation of
the system. It also allows users to quickly start operating the
system if it is not used regularly.
Centrix D
With the Centrix
Diagnose, Megger offers a
combination of the Centrix
cable fault location system
and a cable testing and
diagnosis system. The base
unit is a Centrix system
either in a single or three-
phase version up to 80 kV.
This system can be equipped
with a 0.1 Hz sinusoidal
VLF in combination with
tan delta diagnosis or a 0.1
Hz cosine rectangular VLF
system.
Fully integrated cable test, location and diagnosis system

Flexible solution to integrate portable
equipment into a combined system
NSF E
The NSF E system control panel provides the possibility of
combining up to four separate units into one single system
and managing their operation via a central control while
providing the best operational comfort and safety.
The NSF E system control panel has an integrated, adaptable
control with rotary encoder. This control can be configured
for almost any device. The control includes power switches,
HV on/off, emergency off and an integrated FU/EP safety
system. The display shows the input voltage and current, the
messages of the safety system and the selection menu for
the connected devices. All messages appear in full text in the
user-selected language.
Voltage Type of operation Surging Comments
Centrix 80 kV Automatic 4/8/16/32 kV Easiest operation
Centrix D 80 kV Automatic 4/8/16/32 kV Diagnostic add ons
Compact City 40 kV Automatic 4/8/16/32 kV SPG 40 System
Classic 80 kV Manual 8/16/32 kV Classic
NSF E 40 kV Separate units Any SWG Makes a system out of portables
NSF E refers to units making a system when combined with stand alone devices that includes full safety features.
Small vehicle cable test and
location system
Cable fault locating test vans
The Compact City is a complete cable test and fault location
system suitable for installation into very small vehicles. It
consists of the SPG 40, a mobile, multifunctional system for
testing, prelocation, pinpointing and burning of cable faults
in low and medium voltage networks and a pin-pointing
device. The system is controlled directly via the connected
Teleflex SX reflectometer or the control panel, either
integrated or as 19” version. All functions of the system
are easily managed by the rotary encoder in the control
panel. The system is designed to be easy and clear, even for
inexperienced users.
Compact City
Modular single-phase cable fault
location van
Classic
The Classic is a modular single-phase system for testing and
fault location on power cables in low and medium voltage
networks. It offers a maximum variability in the equipment
options and features of a cable test and fault location system.
The flexibility permits a very specific customer suited
adaptation of the system for cable testing, surge energy for
the pinpointing, burning and sheath fault location.

Low current, low resistance testing
Low resistance testers or micro-ohmmeters are used for testing the integrity of joints, as
there can be serious consequences if there are bad connections in critical electrical systems,
poor grounds, heating in connections, broken rails on the railways, or poor welds on aircraft
wings. Routine maintenance using low resistance testers can highlight problems before they
become catastrophic.
10 A micro-ohmmeter
DLRO10/10X
The DLRO10X offers a 0.1 µΩ resolution with a maximum
range of 2 kΩ. Fast testing ability means users can achieve
results in less than 3 seconds. At only 5.5 lbs it is the smallest,
lightest and most sophisticated 10 A low resistance ohmmeter
available, making it convenient for general testing.
The DLRO10X has the capability of measuring inductive loads
such as transformers and motor windings. The DLRO10X adds
on-board memory, RS232 download capability, and manual
or automatic range control to the features of the DLRO10. It
also uses easily interchangeable and rechargeable batteries.
The DLRO10 and DLRO10X can also be powered from an
optional mains power supply unit, the DLRO10LPU. This unit
is simply fitted to the instrument in place of the standard
battery pack.
Dual power 10 A micro-ohmmeter
DLRO10HD
DLRO10HD is a tough, low resistance ohmmeter which is
designed to withstand the harsh conditions of real world
testing. Rated at IP65 when the lid is closed and IP54 when
operating under battery power, the DLRO10HD has a
resolution of a 0.1 µΩ. Additionally, there are also 2 power
output levels to assist with condition diagnosis. One is
limited to avoid heating the test sample while the other
maintains a set high power output. The DLROHD can also
operate from line power.

Wind turbine lightning protection
test lead set
KC
The KC series of test leads provide a
complete and convenient solution to
the problem of finding reliable test
leads that are long enough for testing
the continuity of lightning protection
conductors in wind turbines.
KC series wind turbine test leads are
available in 328 ft, 164 ft and 98 ft
versions that are equally suitable for
use on site or in the manufacturing
plant. All lead set versions are 10 A
rated.
Clips and leads for low
resistance testing
Megger DLROs require two potential (voltage) and two
current test leads to make low-resistance measurements. In
addition to individual current and potential leads sets, duplex
leads that combine current and potential connections in one
lead are offered. A variety of terminations, C-clamps, Kelvin
clips, fixed point, and helical spring-point leads are available.
* Used with DLRO10 and DLRO10X only
** Gold plated *** Silver plated
Individual Test Leads
Cat. No Type Termination Length Current
242021-7
Potential Hand Spikes
7 ft. (2 m)
N/A242021-18 18 ft. (5.5 m)
242021-30 30 ft. (9 m)
242041-7
Current
Terminal
Clips
7 ft. (2 m)
10 A242041-18 18 ft. (5.5 m)
242041-30 30 ft. (9 m)
242144-16 Current Clamps 16 ft. (5 m) 100 A
Duplex Test Leads
Cat. No. Termination Length Current
242011-7
Helical hand spikes with
spring points
7 ft. (2 m) 10 A
6111-022 8 ft. (2.5 m) 10 A
242011-18 18 ft. (5.5 m) 10 A
6111-023 20 ft. (6 m) 10 A
242011-30 30 ft. (9 m) 10 A
6111-503* Duplex hand spikes 4 ft. (1.2 m) 10 A
242009-18
Helical hand spikes with
spring points and current
push-button switch
18 ft. (5.5 m) 10 A
242002-7
heavy-duty, fixed-point
hand spikes
7 ft. (2 m) 10 A
242002-18 18 ft. (5.5 m) 10 A
242002-30 30 ft. (9 m) 10 A
242003-7
Replaceable needle
points
7 ft. (2 m) 10 A
242104-2-16
Heavy-duty C-clamps
16 ft. (5 m) 100 A
242104-2-26 26 ft. (8 m) 100 A
242004-7 7 ft. (2 m) 10 A
242004-18 18 ft. (5.5 m) 10 A
242004-30 30 ft. (9 m) 10 A
241005-7** 0.5 in. (1.3 cm)
Kelvin clips
7 ft. (2 m) 10 A
242005-7*** 7 ft. (2 m) 10 A
242006-7
1.5 in. (4 cm)
Kelvin clips
7 ft. (2 m) 10 A
242006-18 18 ft. (5.5 m) 10 A
242006-30 30 ft. (9 m) 10 A
6220-755
Current lead with HD
clips and separate
potential leads with clips
16 ft. (5 m) 600 A
6220-756 33 ft. (10 m) 600 A
6220-757 49 ft. (15 m) 600 A
6220-787 16 ft. (5 m) 200 A
1000-809*
Kelvin clip and hook ends
on HD cable reel with
friction brake
328 ft.
(100 m)
10 A
DH2 lead with duplex
hand spikes and hook
end
16 ft. (5 m)
Kelvin Clips
Feature spade lugs
on outboard end and
alligator clips with
insulated, silver or
gold plated jaws.
Cat. No. 241005-7,
242005-7, 242006-7,
242006-18, 242006-30
Heavy Duty C-Clamps
Current passes through
the C-Clamp and screw
thread; potential
passes through a
four-point anvil
insulated from the
clamp metal.
Cat. No. 242004-7,
242004-18, 242004-30
Heavy Duty Fixed
Points
Economical, light
weight and durable.
Cat. No. 242002-7,
242002-18, 242002-30
Helical Spring Points
Tips rotate and
compress into the
probe’s body to ensure
accurate measurement.
Cat. No. 242011-7,
242011-18, 242011-30,
242009-18
Wind Turbine
Lightning Protection
Test Lead Set
Specially designed
for measuring
resistance of lightning
protection circuit
between wind turbine
blade tip to ground.
Cat. No. 1000-809
Hand Spikes,
DH Series
Feature indicator
lights in one of
the probes which
duplicate warning and
signal lights on the
instruments.
Cat. No. EV6111-503
(DH4), EV6111-517
(DH5).
Low current, low resistance testing

High current, low resistance testing
For testing circuit breaker contact resistance, low resistance testers are used for testing circuit
breaker contact resistance with a high output current. For this and other applications that
require a higher test current, Megger offers an extensive range of testers that will fit your
testing needs.
Hand-held 200 A micro-ohmmeter
DLRO-H200
The DLRO-H200 high-current micro-ohmmeter uses ultra-
capacitor technology to achieve its size. A key benefit is that
this instrument operates from rechargeable batteries giving
over 2,000 measurements per charge, allowing a full day’s
testing to be done where there is no mains supply.
The DLRO-H200 is suitable for a range of applications,
including testing busbar and cable joints, and carrying out
contact resistance measurements on low-, medium- and high
voltage circuit breakers. Circuit breaker tests performed with
the instrument conform fully to IEC and IEEE standards. The
DLRO-H200 supports DualGround testing for circuit breakers.
The DLRO-H200 is auto-ranging and measures resistance
from 1 µΩ to 1 Ω. Results are shown on an LCD display that
includes an analog arc to show the start of charge of the
ultra-capacitor. 190 tests results can be stored on-board and
be downloaded via a wireless Bluetooth connection. The
Bluetooth facility can also be used with a headset to provide
an audible pass/fail signal against user adjustable limits as
tests are performed.
10-200 A DC filtered micro-ohmmeter 10-600 A DC micro-ohmmeter
DLRO200/115 DLRO600
Provides the operator with
high resolution, 0.1 µΩ,
portable method of
performing on-site low
resistance measurements.
The test current is variable
from 10 A to 600 A, in
1 A steps, enabling the
user to perform all the
required tests with a single
instrument. The unit can be
used to test small circuit breaker contact
resistance to IEC 62271-100, switch contacts,
busbars, joints, splices, fuses and rail bonds. The full keyboard
makes labeling and storing of results quick and easy.
A large liquid crystal display provides all the information
needed to perform a test and displays all test parameters and
measurement results.
The DLRO200/115 measures contact
resistance in high voltage
circuit breakers, disconnecting
switches (isolators), busbar
joints, and other low resistance
applications.
This test set accurately measures
resistances ranging from 0.1µΩ
to 1Ω, at high currents.
The DLRO200-115 can provide test currents
from 10 A up to 200 A, subject to the load
resistance and supply voltage. For applications that demand
a smooth DC current, the DLRO200-115 has extra filtering on
the output to reduce mains frequency ripple and can drive
200 A through a total current loop resistance of 11 mΩ.
The DualGroundTM
symbol certifies the use of
groundbreaking technology and methods that
enables a safe, fast and easy workflow with
both sides grounded throughout the test.

600 A micro-ohmmeter
MOM690A
Offering a test current
from 0 to 600 A DC,
the MOM690A has a
measurement range up to
200 mΩ with a resolution
of 1 µΩ. The MOM690A can
be programmed to perform
an individual test or an entire
series and store the results.
There is an AC output for quick
and easy demagnetization of CTs.
200/600 A micro-ohmmeter
MOM series
Both of these low resistance
ohmmeters have a
measurement range up to
2 mΩ with a resolution of
1 µΩ. They offer a choice of
a maximum current of 600
A and 200 A. The MOM200
weighs as little as 31 lbs.
200/600 A true DC micro-ohmmeter
MJÖLNER series
The Mjölner adds a new level of safety to circuit breaker testing with DualGround and
remote control capability.
The ripple free DC test current can be varied from 5 A to 600 A or 200 A, depending on
model, with a maximum continuous current of 300 A or 100 A respectively. The measuring
range is up to 1 Ω with a resolution as low as 0.1 µΩ depending on the resistance being
measured. The Mjölner is equipped with a USB port for the downloading of data.
High current, low resistance testing
Safer and Faster Testing with DualGround™
DualGround™ is Megger’s groundbreaking technology that enables a
safer and faster workflow because both sides of the circuit breaker remain
grounded throughout the test.
Dynamic Capacitance Measurement
Megger test sets with DualGround™ technology uses dynamic capacitance
measurement (DCM) to measure contact timing on circuit breakers with both
sides grounded. The results are identical to those achieved with conventional
contact timing methods. This makes it possible to test circuit breakers without
removing jumpers and bus-bar connections, opening up a wide range of
applications in gas insulated substation, generator and transformer breaker
diagnostic testing.
Why is it safer?
Conventional timing requires at least one side of the circuit breaker to be
ungrounded to allow the instrument to sense the change in contact status.
Live high voltage conductors will induce currents in all parallel conductors
due to capacitive coupling. In a disconnected circuit breaker with one side
connected to earth and both disconnectors open, this current can reach
double digit mA values which are lethal for humans.
The DCM technique uses high frequency to achieve resonance in the test
circuit. The resonance frequency varies when the circuit breaker changes state,
and this is how a change from open to closed (and vice versa) is detected. This
also means that the technique is completely immune to the effects of 50 or 60
Hz interference.
Using DCM we can obtain reliable measurements with both sides of the circuit
breaker grounded, thus never exposing personnel to any induced currents.
Testing with DualGround™
Testing is much safer using the DCM module and DualGround.
With only one side grounded the induced current can reach values
high enough to be harmful or lethal for humans.

Circuit breaker analyzing
Megger’s circuit breaker analyzer series offer a full spectrum of IEEE and IEC recommended
tests to help ensure your circuit breakers never fail to operate. Our analyzers accurately
capture the critical first trip, measure timing, travel, coil currents, static and dynamic
resistances, and perform vibration analysis on high voltage circuit breakers.
More than 2 breaks per phase circuit
breaker analyzer system
TM1800 series
The TM1800 is the instrument
platform for circuit
breaker maintenance,
based on more than
20 years experience
with over 4,000
delivered breaker
analyzers.
Its modular
construction makes it
possible to configure the TM1800
for measurements on all known types of circuit breakers
in operation on the market. The robust design contains
powerful technology that streamlines circuit breaker testing.
Sophisticated measurement modules enable great time
savings as many parameters can be measured simultaneously,
eliminating the need for new setup each time.
2 breaks per phase circuit breaker
analyzer
TM1700 series
The TM1700 series circuit
breaker analyzers
utilize ground
breaking technology
from the top of the
line TM1800. There
are 5 models available,
from PC remote
controlled to fully stand-
alone options. All models
can be controlled from a
computer using the well
proven data management
and analyzing software
CABA Win.
The TM1700 series supports efficient and reliable circuit
breaker testing. All instrument inputs and outputs are
designed to withstand challenges in high-voltage substations
and industrial environments. Galvanically isolated inputs
and outputs make it possible to perform all relevant
measurements in one test, eliminating the need for new
setup and connection changes.
Timing measurement inputs use a patented Active
Interference Suppression algorithm to ensure correct timing
and accurate PIR (Pre-Insertion Resistor) values even with high
capacitively coupled interference currents.
Static dynamic resistance measurement
SDRM
Circuit breaker analysis software
CABA Win
The ability to accurately compare circuit breaker tests with
previous test results is essential. CABA Win helps achieve this,
by ensuring the tests are conducted in exactly the same way
and under the same conditions as those conducted earlier.
Comparison can then provide a clear picture of any deviations
and changes and a decision can be made to keep the CB in
operation or take it out of service for further investigation.
1 break per phase circuit breaker analyzer
EGIL
Designed using the
experience gained
from our larger
instruments, the
EGIL is intended
for breakers with
one break per
phase. Its size and
simplicity makes
it attractive to
smaller power
plants and maintenance departments.
The EGIL can be used with the SDRM accessory.
Used together with TM1800,
TM1700 or EGIL, the SDRM
measures the contact resistance
while the circuit breaker is in
operation. It can be used to assess
the condition of the contacts and
the arcing contact length in SF6
circuit breakers.

Vacuum bottle tester
VIDAR
VIDAR is used to check the integrity
of the vacuum interrupter quickly
and conveniently by means of the
known relationship between the
flashover voltage and the vacuum
interrupter. A suitable DC test
voltage is applied to the breaker,
and the result is known immediately.
The VIDAR comes with a full
switching power supply producing pure DC.
On-line protection condition analyzer
PCA2
The PCA2 is a complete
substation protection
performance evaluation
and recording system.
Its advanced software-
controlled current source
can inject a precise current
into the relay while the
system is on-line. The
critical ‘first-trip’ of the
relay and circuit breaker
can then be captured and
automatically analyzed.
Developed to facilitate
nonintrusive testing of
the entire substation protection system while on-line, PCA2
incorporates an advanced current injection unit together
with a multichannel recorder. Both injection and recording
functions can be used together or totally independently.
DC power supply
B10E
A useful power supply unit
providing a controllable DC power
source to supply the circuit breaker
under test. It is also used for
minimum trip coil voltage tests to
make sure the circuit breaker will
still operate if the voltage drops.
Linear transducers
Accessories
A range of linear
transducers are available.
Rotary transducers
Rotary transducers are available in analogue and digital
forms.
Vibration kit
Includes SCA606, CABA Win
vibration software and one
vibration channel.
Rotary transducer
mounting kit
SSR kit
Synchronized switching relay
test kit for TM1800 including
accessories, software and
cables.
Current sensor
100 A AC/DC clamp for first trip analysis.
Temperature sensor
The ambient temperature is
automatically measured and
stored with the test result.
Circuit breaker analyzing

Ideally suited for industrial,
utility and testing service
company use, the DDA-1600
is designed to maintain
and test low-voltage power
circuit breakers rated to
1600-ampere frame size. In
addition, it can be used for
verifying the ratio of current
transformers and testing
thermal or magnetic motor
overload relays.
In the series configuration, the
higher voltage output of Model DDA-1600 permits ready use
in substations for primary injection testing of high-voltage
circuit breakers and protective relays.
Overload relay tester
1600 A circuit breaker tester
35,000/60,000 A circuit breaker testers
DDA-1600
DDA-3000/6000 seriesCB-832
The CB-832 test se is a high-
current circuit breaker and
overload relay test set. Model
CB-832 is designed to test the
circuit breaker and overload
relays by means of primary
current injection.
The CB-832 is a self-contained
test set that incorporates a
variable high-current output
and appropriate control circuitry
and instrumentation for testing thermal, magnetic or solid-
state motor overload relays; molded-case circuit breakers;
and ground-fault trip devices.
Circuit breaker and overcurrent
relay tester
MS-2A
MS-2A is capable of testing
the time-delay characteristics
of overcurrent relays, motor
overload relays and moulded-
case circuit breakers, rated up
to 125 A, when following the
recommended test procedure
for testing the time delay of
these devices at three times
their rating.
Higher currents are available for the short durations required
to test an instantaneous trip element. For example, the
test set will provide a maximum short duration output of
750 amperes through a typical, 125 A, moulded-case circuit
breaker.
The DDA-3000 and
DDA-6000 series are
designed specifically to
test low-voltage power
and molded-case circuit
breakers equipped with
thermal, magnetic or
solid-state trip devices.
The units are fully
compliant with NEMA
AB-4 test guidelines.
Tests are performed by
simulating an overload or fault condition. Each test set is
an integrated test system that provides a variable, high-
current output. The test sets incorporate all control circuitry
and instrumentation necessary to test direct-acting circuit
breakers accurately, efficiently and safely.
The principle behind primary current injection testing is simple – a test current is injected into
the high current side of the system to determine how various system components function
at this particular level of current. The test current used has to be similar in magnitude to the
current expected during continuous or instantaneous operation of the electrical apparatus
so that operating conditions are accurately simulated. Primary current injection is a versatile
technique that can be applied to test the operation of circuit breakers, automatic reclosers
and sectionalizers, the ratio and polarity on current transformers, and the integrity of
ground grids and other safety grounding devices.
Primary current injection testing

Primary current injection testing
5 kA current injection test system
INGVAR
This 5000 A, two-piece portable test system is designed for
primary injection testing of protective relay equipment and
circuit breakers. Its unique I/30 function allows the current to
be pre-set using low current to prevent test sample heating.
Ideal for commissioning protection systems, testing
molded-case circuit breakers and many other high current
applications.
8/13 kA current injection test system
ODEN series
The ODEN AT primary current
injection test system consists
of a control unit together with
one, two or three current units
offering a maximum output of
13 kA for one second and 3800
A continuous. There are three
versions of the current unit: S, X
and H. The S and X current units
are identical except that the X
unit has an additional 30/60 V
output. The H unit is rated for
even higher current.
The control unit has many
advanced features. The
measurement section can display
turns ratio, time, voltage and
current. A second measurement
channel can be used to test an additional current or voltage.
Current transformer turns ratio, impedance, resistance,
power, power factor (cos φ) and phase angle are calculated
and shown on the display. The fast-acting hold function
freezes short-duration readings on the digital display.
Microprocessor-based circuit breaker
test sets
Overload relay tester
PS-9116/9130/9160
CB-845
The PS-9116 is designed to
maintain and test low-voltage
power circuit breakers rated
up to 1600 ampere frame size.
In addition, it can be used for
verifying the ratio of current
transformers and testing
thermal or magnetic motor
overload relays.
In a series configuration,
the higher voltage output
of Model PS-9116 permits ready use in substations for
primary injection testing of high-voltage circuit breakers and
protective relays.
The CB-845 is a high-current circuit
breaker test set consisting of a
control unit and a high-current
output unit.
The lightweight, two-section design
of the CB-845 enables the user to
easily transport the unit into areas
previously inaccessible to high-current
test equipment such as elevated or
subsurface load centers, shipboard
power panels, elevator machinery
rooms and other isolated locations.
The CB-845 is suitable for a wide variety of testing
requirements including molded-case circuit breakers; thermal,
magnetic or solid-state motor overload relays and other
overcurrent protective devices. Additional applications
include verifying the ratio of current transformers and testing
ground-fault trip devices.

The OCR-8015 and OCR-
9150 Automatic Oil Circuit
Recloser Test Sets are self-
contained mobile test sets
specifically designed to
verify the proper operation
of automatic circuit
reclosers under simulated
overload and fault
conditions. This ensures
reliable system protection and coordination. Microprocessor-
based control and instrumentation systems ensure simple
operation with precise test results. OCR-8015 and OCR-9150
provide a variable high-current output with an impedance
compensation network to stabilize the output current. The
OCR-9150 has the additional capability to test the time-
current characteristics by simulating overloads as high as eight
to ten times the continuous current rating.
Automatic oil circuit recloser test sets
OCR series
Current supply units
CSU600A/AT
These high-current supply
units have two main fields
of application. The first is
to conduct primary tests
on protective relays. The
second involves conducting
current tests on low-
voltage circuit breakers
and overcurrent devices.
Both outputting 600 A,
the CSU600A requires the
use of an external timer
and ammeter, while the
CSU600AT comes with
built in timer and analog ammeter that provides rough
current settings quickly and easily, reducing connection time
to a minimum.
Input autotransformer
AT-1
Model Number Mode Pieces Largest Breaker Input Voltage Max. Output
Through a Breaker
MS-2A Manual 1 125 A 120 or 240 750 A
CB-832 Manual 1 225 A 120 or 240 1,800 A
INGVAR Manual 2 500 A 100 to 240 5,000 A
CB-845 Manual 2 500 A 208/240 5,000 A
DDA-1600 Manual 3 1600 A 460 19,200 A
PS-9116 Automatic 3 1600 A 460 19,200 A
ODEN AT Manual 2-4 500 A - 2,000 A 240 or 480
7 kA (7,000 A) to
20 kA (20,000)
DDA-3000 Manual 1 3,000 A 460 35,000 A
DDA-6000 Manual 1 6,000 A 460 60,000 A
PS-9130 Automatic 2 3,000 A 460 35,000 A
PS-9160 Automatic 2 6,000 A 460 60,000 A
CB-360-DC Manual 2 N/A 460 30,000 A DC
If the nominal input voltage for the test set is not available,
or if uses at different locations require the use of a variety
of input voltages, the AT-1 autotransformer may be used.
The multitapped autotransformer is equipped with a power
on/off switch, appropriate sockets, plugs, interconnect and
tap selector cables. It is housed in a rugged sheet-metal
enclosure with casters and handles.
All voltages are single-phase
with a tolerance of ±5%.
Input taps of 240 volts and
below are not recommended
for obtaining maximum
output of the test set. For
other combinations of input
and output voltages, contact
Megger.
DC circuit breaker tester
CB-360
The CB-360-DC DC Circuit Breaker Test Set is designed to test
low-voltage DC circuit breakers with dc current. The unit
provides the capability of calibrating and functionally testing
the time-delay characteristics of the electromechanical or
thermal-magnetic trip devices on dc circuit breakers. This is
accomplished by simulating an overload or fault condition on
the circuit breaker.

Relay testing
Quiet fans
thermally controlled
3 voltage channels
300V @ 150 VA
6 current channels
3 x 60 A @ 300 VA
3 x 15 A @ 150 VA
USB
communication
Ethernet in for
chaining units
for IEC 61850
communication
8 of 10 binary inputs
5 to 300 VAC
5 to 300 VDC
Rugged case
2 of 10 binary inputs
5 to 300 VAC
5 to 300 VDC
2 of 6 binary outputs
2 high current
Battery simulator
variable 5 to 250 VDC
Safety ground
Bluetooth®
wireless communication
STVI
communication
Main power
95 to 264 VAC
50/60 Hz
4 of 6 binary outputs
2 high current
2 high speed
Ethernet out
Small, lightweight
25.8 lbs, 11.6 kgs
Large, oversized
rubber cushioned handle
60 amp/phase
Protective relays in the electrical power system provide protection against overloads,
faults, abnormal conditions, etc. Like any complex device, relays deteriorate over time.
Electromechanical relays may malfunction due to aging of mechanical components, and
even solid state and microprocessor based relays with no moving parts may experience
electronic circuitry failure or software/firmware issues. NETA Maintenance and Testing
standards recommend routine testing of your relays to ensure they function correctly when
needed. Proper testing and maintenance of protective relays safeguards the integrity of the
protection scheme, prevents nuisance tripping and minimizes damage to equipment when
faults do occur.
3 voltage, 3 current channels at 60 A per channel three-phase relay test set
SMRT36
The SMRT36 is conceivably the smallest, lightest, highest output powered three-
phase relay test system in the world today. The test system may be customized
by adding “VIGEN” modules for specific test applications. For electric utility use,
the SMRT36 with three VIGEN modules provides complete three-phase testing of
three-phase impedance, directional power, negative sequence overcurrent and
other devices that require a three-phase four-wire wye connected source.
With three modules, output current and voltage is tripled for high instantaneous
or high burden overcurrent relays. With the voltage channels converted to
currents, the same unit can provide 6-phase current.
STVI
STVI
Products associated with this symbol are STVI compatible. See STVI, page 31.

3 voltage, 3 current channels at 45 A per
channel three-phase relay test set
SMRT33
The SMRT33 provides high power in both the voltage and
current channels to test virtually all types of protective relays
used in heavy industrial, distributed generation and low to
medium voltage distribution substations.
The SMRT33 has the “smart” combination of high compliance
voltage and high current to test all electromechanical, solid-
state and microprocessor-based overcurrent relays, including
high impedance directional ground overcurrent. In addition,
the unit includes capability to test IEC 61850 devices.
4 voltage, 6 current channels at 60 A per
channel multi-phase relay test set
SMRT410
The SMRT410 provides a complete multi-phase test system
for the commissioning of protection systems. With up to 4
voltage channels and 6 high current channels, the SMRT410
meets every testing need. The SMRT410 VIGEN modules also
provide high power in BOTH the voltage and current channels
to test virtually all types of protective relays. The SMRT410
test system may be customized by adding the number of
Voltage-Current, “VIGEN”, modules needed for specific test
applications.
The SMRT410 test system has the ability to be controlled with
Megger’s STVI or a PC.
Smart touch view interface
STVI
The Smart Touch View Interface™ (STVI) is Megger’s
handheld controller for the SMRT, MPRT and MRCT relay test
systems. The STVI features a large, full color, high resolution,
and high definition TFT LCD touch screen. The user can
perform manual, steady-state and dynamic testing quickly
and easily using the Manual or Sequencer test screens. There
are hundreds of built-in preset test routines for the most
popular relays.
1 voltage, 1 current channel at 60 A per
channel single-phase relay test set
SMRT1
Weighing in at only 7 lbs, the SMRT1 is an amazingly
powerful relay test set. With single current and voltage
generators, the current channel outputs 75 A at 400 VA
while the voltage channel outputs up to 300 V. The voltage
channel can be converted to a current channel outputting
15 A constant 150 VA.
The instrument can be daisy-chained together to give more
channels or more power. Three SMRT1s connected together
will make a fully automatic three-phase test set.
STVI
STVI STVI

Relay testing
GPS timing reference
MGTR-II
The MGTR-II is a small, lightweight, field portable, GPS satellite receiver
system specifically designed to perform end-to-end tests of line protection
schemes. It is designed to be used with the Megger SMRT, MPRT and PULSAR
relay test systems. The MGTR-II provides a precise programmed output pulse
(POP), with 100 ns of resolution.
The MGTR-II provides a standard 1 Pulse Per Second (PPS), and ASCII serial
time message, external event time-tag, an IRIG-B serial time code output
signal and most importantly, a programmable output pulse for performing
end-to-end tests.
Relay testing software
AVTS
Full automatic testing of the SMRT or MPRT series may be
controlled by Advanced Visual Test Software (AVTS). AVTS
is a Microsoft®
Windows®
XP®
/Vista™/7 compatible software
program designed to manage all aspects of protective relay
testing.
AVTS comes in three different levels:
n Basic test
n Advanced test
n Professional test
Every unit comes with AVTS Basic. It includes online vector
control for single and multi-state timing tests including
reclosing and online ramp control for automatic ramping
of voltage, AVTS can display the current, phase angles or
frequency to voltage and current output waveforms.
It can find minimum operating/pickup and time sequence
with drop out tests and online Click-On-Fault the binary
inputs and for dynamic tests of impedance relays outputs with
the ability to import specific relay impedance characteristics.
The user may also save, execute and print relay specific
test modules and results. Test results may also be exported
directly to Microsoft Word. AVTS also includes new enhanced
relay test wizards for over-current, voltage, differential,
impedance and frequency relays, making relay testing swift
and easy. The AVTS Advanced Test version includes the
powerful test editor, dynamic control including dynamic
end-to-end testing capability, modbus communication test
capability, ASPEN OneLiner™ or Electrocon CAPE™ SS1 File
Converter for dynamic testing, and easy-to-use programming
tools for creating and editing test modules.
The AVTS Professional Test version includes all of the features
of Basic and Advanced versions plus some other powerful
test tools and features. It includes the DFR Waveform Viewer,
One-Touch™ test for fully automatic tests, and Waveform
Digitizer to digitize scanned waveforms of electro-mechanical
over current time curves.

Protective relay test systems
MPRT series
The MPRT 2145 has high compliance voltage and high current
to test electromechanical, solid-state and microprocessor-
based overcurrent relays, including voltage controlled,
voltage restraint and directional overcurrent.
three-phase impedance, directional power, negative sequence
overcurrent and other devices that require a three-phase
four-wire wye connected source.
Each current channel is rated for 30 A @ 200 VA continuous,
and up to 45 A @ 300 VA for short durations. For testing relay
panels or electromechanical relays, it has a unique flat power
curve from 4 to 30 A that insures maximum compliance
voltage to the load at all times.
The MPRT 2145 test system has the ability to be manually
controlled with Megger’s STVI or a PC. The STVI allows the
user to perform manual, steady-state and dynamic testing
quickly and easily using the manual test screen, as well as
using built-in preset test routines for most popular relays.
The MPRT8445 is a multipurpose, light-weight, field portable
test set. The unit is capable of testing a wide variety of
electro-mechanical, solid-state and microprocessor-based
protective relays, small molded case circuit breakers, motor
overload relays and similar protective devices.
The test system may be customized by adding the number
of Voltage-Current, “VIGEN”, modules needed for specific
test applications. For electric utility use, the MPRT8445 with
three VI Modules provides complete three-phase testing of
STVI
Timer unit
TM200
A timer is often needed for use
with the CSU600A current supply
unit or ODEN A primary current
injection test system. Testing
relays with SVERKER 650 also
requires an extra timer if more
than one timing cycle is to be
measured. The TM200 is ideal for
these tasks.
Voltage and current source
CSU20A
This power source is
primarily designed for use
with the Sverker series. It
is a multipurpose AC and
DC source featuring an AC
current and voltage output,
a fully rectified DC output
and a half wave rectified
output for harmonic
restraint testing.
Phase angle meter
PAM series
The instrument displays phase angle directly with a resolution
of 0.1º. No calculation or interpolation is needed. Voltages up
to 500 V and currents up to 25 A can be connected directly
to the instrument, and the current range can be readily
extended by using external current transformers. Available in
single- or three-phase models.

The SVERKER 900 is designed for
basic manual three-phase
secondary testing of
protection devices.
In addition, various
primary testing can
be performed, since
the current and
voltage sources can be
series- and/or parallel
connected to allow
for up to 105 A AC or
900 V AC output. All
three current and four
voltage sources can be individually
adjusted with respect to amplitude, phase angle
and frequency. The fourth voltage source allows for testing
of numerical relays that needs a reference voltage simulating
the busbar.
100 A relay testing unit
SVERKER650
The Sverker650 provides all
of the functions necessary
for secondary testing of any
type of single-phase relay. It
features logical design, and
it is extraordinarily easy to
learn and use.
SVERKER700 series
SVERKER 900
The SVERKER750 and
SVERKER780 feature
many functions that
make relay testing
more efficient. The
measurement section
can display time,
voltage and current
Z, R, X, S, P, Q, phase
angle and cos φ. The
voltmeter can also
be used as a second
ammeter when testing
differential relays. All
values are presented on a single easy-to-read
display. Directional protective equipment can be tested with
the integrated variable voltage source. The SVERKER780 has
a continuous phase shift function and adjustable frequency,
enabling automatic reclosing device.
Relay testing
States® Terminal Blocks & Test Switches
All products give long-term connection quality and mechanical
stability. States switches are UL listed, and CSA certified.
STATES Test Paddles are available in
10 and 14 pole configurations. The
paddle is ergonomically designed
for easy connection to a test switch.
With labeled 4-way connectors,
it is easy to locate a connector to
its corresponding switch. The test
paddle can be used with STATES
FMS test switches and ABB FT-1
10 Pole test switches.
States® 10 and 14 Pole Test Paddles
For information about STATES products, contact STATES sales at:
T: 800-325-4574 US
T: 800-297-9688 Canada
T: 214-331-3201 Mexico
E: STATES@megger.com
Three-phase power measurement meter
PMM-1
The PMM-1 measures AC/DC voltage, AC primary and
secondary current, power, power factor, reactive power,
phase angle and frequency of single and three phase
electrical systems with extreme accuracy. It has an integral
solid state timer for continuity and voltage sensing and
harmonic measurement up to 49th
harmonic. For detailed
waveform analysis, a high-speed capture function allows 20
measurements per second. A data port allows bi-directional
communication.

Designed to be used
with an external power
source or generator, the
CDAX605 is a precision
instrument using a
combination of bridge
and direct (vector)
measurements and is
capable of measuring
capacitive, resistive and
inductive loads.
CDAX 605 is designed for the laboratory, production line,
field testing of electrical equipment insulation and insulating
materials and calibration of capacitance coupled voltage
transformers and other ratio devices. A test set with unique
high accuracy for the most demanding applications.
Transformer testing
Transformers are one of the most critical and expensive assets in a substation. If a large
transformer fails it will be a major problem for the asset owner. It will be expensive to
repair or replace and there may not be a replacement of the required type available on short
notice. Extending transformer life and predicting failure is becoming increasingly important
to asset owners and managers.
Relay and current transformer tester
MRCT
This light, tough, portable
unit is used to perform
demagnetization, ratio,
saturation, winding
resistance, polarity,
phase deviation, and
insulation tests on current
transformers. The MRCT
provides automatic testing
of single and multi-ratio
CTs, reducing testing time
and increasing productivity.
The MRCT is available
with or without a built-in
touchscreen display, with
identical
features and
capabilities.
Units without
the built-in
display can
be controlled
using Megger’s Smart
Touch View Interface (STVI)
controller or a PC.
Insulation diagnostic analyzers
IDAX series
IDAX 300 series
uses frequency
domain
spectroscopy
techniques and
state-of-the-art
software to make
a transformer
moisture assessment in less than 18 minutes. FDS is a reliable
and accurate method for assessment of the condition of
the insulating components of transformers and bushings.
It measures capacitances and tan delta (or power factor) of
the insulation between the transformer windings at multiple
frequencies and plots the resultant curve. Comparing this
measured curve with a modelled curve allows estimation of
the moisture content. The IDAX 350 incorporates an on-board
PC for results analysis and reporting within the enclosure.
Adding the VAX020 to the IDAX300 expands the test
voltage range from 200 V to 2 kV. This improves IDAX’s
test performance in terms of accuracy in environments with
extremely high interference such as HVDC substations.
Capacitance and dissipation factor test set
CDAX605
STVI

Transformer testing
28 V capacitance and tan delta test bridge
CB100
Lightweight and low-cost,
the CB100 is ideal for
workshop use. Manually
balanced, it offers a direct
readout of tan delta and
capacitance, overcoming
interference by using a
test voltage of 28 V and a
frequency of 100 Hz.
Capacitance range expansion
Resonating Inductor
This unit expands the range of
Power Factor (Capacitance and
Dissipation Factors) test sets.
12 kV tan delta power factor test set
DELTA4000 series
Tough yet light, and designed to work reliably in high-interference
areas like substation switchyards, Megger’s DELTA4000 series
diagnostic insulation systems offer time saving, fully automatic power
factor/tan delta measurement and tip-up testing. Also provided are
facilities for full manual control –including the ability to vary the
applied voltage up to 12 kV during testing – to cater for special
testing requirements.
Accurate and dependable temperature correction based on the actual
condition of the test object, can be applied to results using a novel
technique, which works with data acquired from a separate dynamic
frequency response (DFR) test. Automatic detection of non-linear
response, which suggests the need for further tip-up testing and
which is often a useful indicator of incipient insulation problems,
is also provided. Despite their small size and low weight, Megger’s
DELTA4000 series test sets offer comprehensive facilities for assessing
the condition of electrical insulation in all types of high voltage
equipment including transformers, bushings, circuit breakers, cables,
lightning arrestors and
rotating machinery. They
also measure the excitation
current of transformer
windings.
The test sets generate their
own test voltage, which
is independent of supply
quality. A further benefit
of this approach is that it
allows the test voltage to
be varied in frequency from
1 Hz to 500 Hz, making
the instruments even more
versatile. There is the
option of using an on-board
computer or an external
computer to control the
Delta4000.
For multiple frequency tan delta measurement as used on generators
and transformers, see the IDAX on page 35.

Leakage reactance tester
Portable current transformer tester
MLR10
BA185
Sweep frequency response analyzers
FRAX series
SFRA is a method for
assessing whether or not a
transformer has been subject
to mechanical damage, for
example when moved
or from a lightning
strike. FRAX and its
software allows repeatable
fingerprinting of transformers so
that a scan can be run whenever it experiences
a traumatic event such as transportation, severe fault or
overhaul, allowing it to go back on line faster. Ideally
a transformer is fingerprinted at birth, but performing
SFRA on older transformers is also advisable so any future
problems can be diagnosed. Compatible with all international
standards for SFRA, the FRAX101 can be battery powered and
has wireless communication with a computer.
The FRAX150 offers all
the benefits of SFRA for
diagnosis of damage
to transformers,
but it is built into
a tough carry case
and includes
an on-board
computer, making
it a self contained
unit. There is a
large bright screen to
make it comfortable to
use even in direct sun light.
Data can be stored on the
hard-drive and can be downloaded
using the galvanically isolated USB port.
The FRAX 150 utilizes PowerDB software.
The Megger Leakage
Reactance Tester MLR10 is
used to measure leakage
reactance and other
associated parameters
in high voltage power
transformers. Leakage
reactance, or more
generally leakage
impedance, is measured
at the transformer primary winding while the secondary
winding is shorted. Ideally, a transformer’s primary and
secondary windings should be 100% coupled by magnetic
flux, but in real transformers there is always a small amount
of leakage flux. Leakage inductance is a result of this
leakage flux.
Transformer test equipment selection chart
Component
Megger
Instrument
Windings
Resistance MTO
Ratio/polarity TTR
Excitation current
DELTA, TTR,
IDAX
Short-circuit impedance MLR, FRAX
Frequency response
analysis
FRAX
Insulation resistance S1
Capacitance DELTA, IDAX
Power factor/tan delta DELTA, IDAX
Dielectric frequency
response
IDAX
Bushings
Capacitance DELTA, IDAX
Power factor/tan delta DELTA,IDAX
Dielectric frequency
response
IDAX
Insulating oil
Dielectric strength OTS
Power factor/tan delta DELTA, IDAX
Cellulose
Insulation
Moisture content IDAX
Tap Changers -
Load
Contact/winding
resistance
MTO
Ratio TTR
Continuity
(make before break)
MTO
Tap Changers –
De-energized
Contact pressure
(resistance test)
MTO
Ratio TTR
Core/Tank
Insulation resistance MRCT, S1
Frequency response
analysis
FRAX
Ground test MOM, DLRO
Current
Transformers
Winding resistance MRCT
Ratio/polarity MRCT
Excitation knee point MRCT
Insulation resistance MRCT
The BA-185 Current Transformer
Burden Ammeter is a rugged, portable
instrument, designed to field-test
current transformer installations
Within the accuracy limits of the CT,
a good current transformer should
not have a noticeable change in ratio
when a secondary burden is added.
This is because the primary effect of
additional burden on a good CT is a
rise in the secondary voltage.

8 V transformer turns ratio testers
TTR series
TTR25 is an automatic handheld transformer ratio test set
used to measure the turns ratio, excitation current and
polarity of windings in distribution and power transformers,
potential and current transformers.
TTR100 is an 8 V transformer turns ratio tester for three-
phase transformer testing. The TTR100 offers a full set of tests
including transformer turns ratio, excitation current, phase
angle deviation, winding resistance and transformer polarity.
The TTR100 stores up to 200 test results on board. Results can
be downloaded with special software included with the unit
to a PC database.
With a turn ratio of 20,000:1, the TTR100 offers the highest
turns ratio accuracy in the industry of 0.1%.
TTR25 TTR100
Transformer testing
Megger three-phase turns ratio and winding resistance testers share common test leads
so all tests can be carried out without having to swap and re-connect leads. This speeds
up testing substantially, especially on large power transformers with multiple taps. For
transformer power factor testing, see DELTA4000 on page 36.
80 V transformer turns ratio testers
TTR300 series
The TTR300 series of three-phase transformer turns ratio
test sets are designed to measure the turns ratio of power,
instrument and distribution transformers in a substation
or manufacturing environment. The instruments are ideal
for power transformer manufacturers. Their unique testing
procedures and storage capability allows an operator to
set up and test difficult three-phase transformers in a
fraction of the time compared to other TTRs.
The TTR300 series also measure the phase deviation of the
transformer primary and secondary. This quickly indicates
problems such as partial shorted turns and core faults.
This is also useful in verifying phase errors in all types of
potential transformers and current transformers.
Each unit comes equipped with a remote-control switch
for single person testing. This allows the operator to test
transformers with LTCs very quickly.
The series consists of three instruments:
The TTR330 offers a
new user interface
which allows the
operator to interact
with the PowerDB
ONBOARD
software
system via a full
QWERTY keyboard
and navigation keypads on
a bright 8.4” VGA full color
screen. An advanced feature of the TTR330 allows the user to
customize test forms via the full-version PowerDB software.
The TTR310 has the
ability to store test
results, upload results
to a PC (via a RS232
serial port), and
print them in
the field via an
optional thermal
paper printer,
without the use of an external
computer.
The TTR300 is designed
to be remotely
controlled via a PC
running PowerDB
LITE (included) or
PowerDB Advanced
or Pro. The TTR300 is
field upgradeable to
the TTR310 or TTR330.

The MTO series delivers full eight-terminal/six-winding
resistance measurement capability. It is designed to save
time by testing all six windings without having to disconnect
and reconnect leads. Also, the simultaneous winding
magnetization (SWM) method gives fast and reliable
measurements even on large transformers with delta
configuration on the low voltage side. Additionally, the MTO
series leads are interchangeable with the Megger TTR300
series of three-phase turns ratio instruments which eliminates
additional connecting time if performing the two tests
together.
The MTO series consists of two models:
The base model, the
MTO300, is designed to
be remote controlled via
PowerDB software on an
external PC or a Megger
transformer test product
with on-board computer.
The MTO330 offers the same functionality as the MTO300.
However, it is equipped with an onboard computer featuring
a full QWERTY keyboard and navigational pushbuttons. It has
an 8.4 inch full-color
VGA transflective
screen viewable in
bright sunlight.
Single-phase transformer ohmmeter
MTO210
MTO210 is a mains
powered, field-
portable instrument
designed specifically
to measure the DC
resistance of all
types of magnetic
windings safely
and accurately. Its
main use is for all
types of transformer
windings but it can also test rotating machine windings and
perform low-current resistance measurements on connections,
contacts and control circuits.
Three features combine to make this instrument unique:
n dual winding measurement
n load tap-changer testing
n auto safety discharge circuit
The dual set of potential inputs measure the resistance of the
primary and secondary windings of a single- or three-phase
transformer simultaneously speeding up the measurement.
To achieve a tenfold improvement in reading time, a
balancing current is applied to the secondary to attenuate the
circulating current induced when the test current is applied
to the primary winding. When testing the windings and
contact resistance on tap-changers with make-before-break
contacts and voltage regulators, the internal shutdown circuit
of MTO210, which will be triggered by a voltage kickback of
a few microseconds if the tap-changer contacts are opened,
can be used to check for pitted or misaligned contacts as the
instrument will shut down if either condition occurs. Users
are protected by the shutdown circuit safety feature: any
inadvertent disconnection of a test lead or loss of power to
the instrument will safely discharge the energy stored in the
test sample.
Three-phase transformer ohmmeter
MTO300 series
PowerDB OnBoard – consistent and repeatable
PowerDB OnBoard embeds the powerful PowerDB asset management software within instruments running the WindowsTM
operating system, eliminating the need for an external computer. PowerDB OnBoard brings field based users consistent,
repeatable tests across instruments, unprecedented data analysis (including historical trend charting) and asset management
tools, all from on-screen ‘forms based’ views.
Also included are a number of new communication technologies, providing a near seamless interface between the
instrument and optional peripheral equipment, such as an “in-lid” USB full-sheet thermal-paper printer, USB flash drive, and
external PC (via Ethernet port). For advanced users, a USB router can be connected to the instrument to provide simultaneous
access to other equipment, such as a mouse or a keyboard. Storage space is provided by either the internal flash memory or
external USB flash drive – sufficient to save literally tens of thousands of test data sets.
Reduced training time
A common user interface reduces the training time needed to understand the different instruments that a busy test engineer
has to use. New instruments with PowerDB OnBoard such as TTR330 and MTO330 are truly forms-based, have a large 8.4”
full-VGA bright color display, and let you set up and control the instruments through on-screen test form views. On-screen
test forms are exact replicas of the test forms which are printed as a permanent test form record once testing is complete.
They are secure reports generated directly from instrument so no human interface is needed.
For more information about PowerDB software, see page 45.

Oil testing
Oil dielectric strength testing
Oil is an efficient coolant with a high flash point and high dielectric strength when used
as an insulator in transformers. The insulation properties can change due to oxidation,
acids, sludge, gas and water absorption. These changes can be monitored using a dielectric
Megger OTS test set.
60/80/100 kV automatic laboratory
oil testers
OTSAF series
Designed for laboratory use, these line powered instruments
measure the dielectric strength of mineral, ester and silicon
insulating oils. With well thought out ergonomics, the vessels
and chambers are particularly easy to drain and clean out.
The screw adjusted electrodes have a unique mechanism to
lock to the precise electrode gap. The detection circuit offers
direct measurement of both voltage and current and the
system has an ultra fast HV switch off time of less than 10 μs
to reduce oil deterioration.
Each instrument has a large, bright,
colored screen to make user interface intuitive.
To assist with the labeling of results files and
recording of comments, there is a phone-like
12 key alphanumeric pad.
The products can be configured to
meet the testing
requirements
of a laboratory
setting.
60/80 kV portable automatic oil testers
OTSPB series
Weighing in at only 35 lbs, the OTS60PB is the lightest, most
portable, battery powered oil test set available. The OTS80PB
is the most flexible test set because it offers more power in
a test set which weighs less than 46 lbs. Featuring the same
easy-empty vessel and quick-drain chamber design as the
laboratory models, the large, bright, color screens are easy
to read in sun light. Features like the electrode precision lock
and ultra fast HV switch off time are particularly important
for instruments that may not be used in
the ideal environment. The OTSPBs can
be configured to match the users needs.
OTS60SX
The OTS60SX
is a light semi-
automatic 60 kV oil
dielectric strength
test set which is
simple to use and
can be powered
from a range of
mains supplies.
60 kV semi automatic oil tester

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