★ CALL US 9953330565 ( HOT Young Call Girls In Badarpur delhi NCR
Pragati pt cataloge
1. RE
M
G
RI
IS FTE DRE
N C .N D E R W R I T E R S A B O R A T O R I E SU L I
UL®
UL®
Pragati Electricals
Private Limited
R - 230, TTC, MIDC
Industrial Area
Rabale
Navi Mumbai - 400 701
INDIA
Underwriters Laboratories Inc.® (UL) issues this certificate to the Firm named above, after assessing
the Firm’s quality system and finding it in compliance with
ISO 9001:2000EN ISO 9001:2000; BS EN ISO 9001:2000; ANSI/ASQ Q9001:2000
The Design & Development and Manufacture of Instrument Transformers and
Specialty Transformers for Industrial Applications.
Further clarifications regarding the scope of this certificate and the applicability of ISO
9001:2000 requirements may be obtained by consulting the organization.
This quality system registration is included in UL’s Directory of Registered Firms and applies to the
provision of goods and/or services as specified in the scope of registration from the address(es)
shown above. By issuance of this certificate the firm represents that it will maintain its registration in
accordance with the applicable requirements. This certificate is not transferable and remains the
property of Underwriters Laboratories Inc. ® .
3612 (US) : Power, Distribution and Specialty Transformers
nd
280/3, 2 Pokhran Road,
Thane - 400 610
INDIA
John H. Schmidt
Senior Vice President, Chief Development Officer
File Number: A12604 Volume: 1
Original Certificate Date: October 13, 2003
ISO 9001:2000 Issue Date: October 13, 2003
Revision Date: September 19, 2006
Recertification Date: October 13, 2006
Renewal Date: October 12, 2009
for the following scope of registration
2. INDOOR CURRENT TRANSFORMERS...........................................08-12
INDOOR VOLTAGE TRANSFORMERS............................................13-17
LOW TENSION INSTRUMENT TRANSFORMERS..........................24-25
H. V. TESTER.....................................................................................26-27
BUS DUCT CURRENT TRANSFORMERS............................................18
OUTDOOR OIL COOL CURRENT TRANSFORMERS.....................21-22
NEUTRAL GROUNDING TRANSFORMERS.........................................23
GENERAL INFORMATION.....................................................................07
INDOOR AND OUTDOOR METERING CUBICLES...............................28
OUTDOOR OIL COOL CURRENT TRANSFORMERS.....................19-20
6
3. Pragati Electricals Pvt. Ltd. was established
in 1975, by electrical engineers having rich
experience in the field of design and
manufacturing of instrument transformers.
During the last 25 years, the company has,
with in-house technology, developed, many
products as per the requirements of the indoor
Switchgear industry and conforming to Indian
and International standards.
PRAGATI is one of the leading manufacturers of
Epoxy Resin Cast Indoor medium voltage
Instrument Transformers and oil cooled
Transformers upto 132 kV in India. They are
manufactured in two modern factories, one at
Thane and another at Navi Mumbai.
Qualified and experienced engineers are
working in sales, Design, Production &Testing.
Products are type tested at recognized
institutes such as CPRI / ERDA etc.
PRAGATI - the name stands for a whole range of
products, high product quality and short delivery
periods.
PRAGATI’s major customers in India include
Switchgear manufacturers such as Siemens,
ABB, BHEL, Altome, and power utilities Such as
Tata Power, CESC, BSES, BEST etc.
! Epoxy Resin Cast - Indoor - Current
&Voltage transformers upto 33kV.
Range : All types upto and including 33kV
in three main types such as Wound-Primary,
Bar-Primary and window type.
! High Current Ring type Current Transformers
Range : Upto 20,000A (22kV system voltage
for Generator Bus-ducts).
! High Current CTs with split core arrangement
for furnace duty.
Range :Upto 60,000A
! All types of Low Voltage Current & Voltage
Transfor mers (Indoor & Outdoor),
Summation Current Transformers and Core
balance CurrentTransformers.
! Epoxy Resin Cast Coil, Dry Type Transformers
upto 22kV & 250kVA for applications such as
neutral grounding transformer, Earthing
transformers, Control transformers etc.
! DC Current & Voltage transformers upto
50,000A and 3000Volts.
! High Voltage Tester (HVT) from 2.5kV to
300kV.
! Outdoor Oil Cooled Current & Voltage
Transformer.
Range : All types upto & including 132kV in
Live Tank & Dead Tank for Current
Transformers & Dead Tank for Voltage
Transformer.
! Outdoor Combined CT VT unit upto 33kV and
Residual voltageTransformer upto 33kV.
! Indoor & Outdoor metering cubicles upto 33kV.
! Special Designs : The company undertakes
design and development of any type of
instrument transformers upto 36kV system
voltage, tailor-made to suit the special
electrical and dimensional specification
required by the customer.
Standards :IS, IEC, ANSI, BS, DIN
7
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25 26
27 28
20. PRAGATI manufactures all type of Indoor / Outdoor low tension current and voltage transformers
and have supplied large nos.of L.T.instrument transformers from 1975 to all the major O.E.Ms.The
company undertakes the design and development of all types of LT current transformers and
voltage transformers to suit the special electrical and dimensional specification required by the
customer.
Types of Low Tension Indoor CTs :
1. Tape wound Ring type current transformers
with / without mounting arrangement.
2. Tape wound / Resin cast, wound primary
current transformers (WPL).
3. Resin cast Bar Primary Current
Transformers.
4. Bushing Cts.
5. Universal Auxiliary Transformer
(Multi Ratio CT).
6. Interposing Current Transformer.
Types of Low Tension Indoor VTs :
1. Tape wound / Resin cast voltage
Transformer.
2. Interposing Voltage Transformer.
3. Isolation Voltage Transformer.
Special Purpose Low Tension Indoor CTs
and VTs :
1. Summation Current Transformer.
2. Core balance Current Transformer (for earth
fault protection).
3. Precision Grade CTs and VTs.
4. Furnace Current Transformers (Split core
Type).
5. D.C. Current Transformer for measurement
purpose.
Types of Low Tension Outdoor Cts :
1. Cycloeliphatic resin cast wound primary Cts
for metering and protection.
2. Cycloeliphatic resin cast bar primary CTs for
metering and protection.
Tape Insulated Cts
Voltage Transformers
Windows Ct’s
LOW TENSION INSTRUMENT TRANSFORMER
24
21. LOW TENSION INSTRUMENT TRANSFORMER
SUMMATION CURRENT TRANSFORMERS :
Summation current Transformers are in
association with feeder current Transformers
which may not have the same ratio.Each feeder is
provided with its own current transformer, and
their secondary windings are connected to the
appropriate primary winding of the summation
current transformer. The summation current
transformer has a single secondary winding
which is connected to the burden. It is essential
that the summation current transformers
are used on the currents of the same frequency
and phase.
CORE BALANCE CURRENTTRANSFORMER:
( CBCT ).
The core balance current transformers are used
for sensitive earth fault protection. Generally it is
sufficient to incorporate insulation monitoring for
signaling appearance of earth faults. The
operating staff in such cases will be able to take
the measures to switch the load over to other
feeders and switch out the fault circuits for
repairs.
INTERPOSING CURRENT TRANSFORMERS :
A current transformer which is intended to amend
the ratio of a main transformer by having its
primary winding connected to the secondary
winding of the main transformer and its
secondary winding connected to the burden.
APPLICATION OF SOME SPECIAL PURPOSE CURRENT TRANSFORMERS.
Windows Ct’s
Windows Ct’s
Core Balance Ct’s
Window type C.T.’s
Busbar type C.T.’s
Summation / Auxiliary C.T.
Window type Ct’s Summation C.T.
Core Balance C.T.
25
22. INTRODUCTION
Every electrical apparatus or machine is provided
with insulation between live part and earth or
between two different sections of live parts. This
insulation is required to be tested at high voltage
values recommended by applicable relevant
standards.
The standard specification for various electrical
apparatus specifies Power Frequency Voltage
withstand test at different levels depending upon
working voltage of electrical apparatus. It is
observed from the various standards for electrical
equipments that the minimum power frequency
voltage withstand test level for electrical
insulation is 3kV for one minute.
We have, therefore, standardized on
manufacture of Pragati High Voltage Breakdown
Testers with rated voltage of 5kV.
High Voltage Test Sets of higher voltage upto
300kV are also manufactured against specific
requirement. The standard voltages are 10kV,
15kV, 20kV, 25kV, 30kV, 50kV, 100kV, 150kV,
200kV & 300kV. The test sets upto 30kV are
manufactured in Air Cooled design while the sets
of 50kV & above are manufactured in Oil Cooled
design.The output of these high voltage testers is
single phase 50/60Hz.The standard H.T. current
rating of air-cooled design as also of oil cooled
design upto 150kV is 100mA for 30 minutes. For
voltage ranges above 150kV the H. T. current is
100mA for 30 minutes.
CONSTRUCTION
Pragati make 5kV A.C. (With 2.5kV tap) High
Voltage Breakdown Tester is portable, sturdy &
plug in to start type construction & requires
minimum table space. It broadly consists of 3
main sections
1.HighVoltageTransformer
2.VariableVoltage Source
3.Control Circuit
1. HighVoltageTransformers:
The High Voltage transformer is single
phase, single pole type & is of double
wound resin moulded construction. The
H. T. winding is provided with graded
insulation such that one end is insulated for
3kV insulation and is earthed through a
c u r r e n t s e n s i n g t r a n s fo r m e r s &
milliammeter whereas other end is
insulated for rated voltage & the same
brought out through H. T. cable & spring
loaded Prod.
2. VariableVoltage Source:
Variable Voltage supply is provided through
a Dimmerstat (Variable auto-transformer)
having a suitable rating corresponding to
the rating of H. V. transformer. Dimmerstat is
rated for 230 Volts A. C. input & 0-270V
output. Limit switch at zero position end of
Dimmerstat winding is provided to facilitate
the H. T. winding to energize only when
Dimmerstat is at zero position.
3. Control Circuit & Other Features:
! Manually operated control transformer
(Variable auto-transformer) with zero
interlock facility.
! 72mm sq. Double range (0-2.5kV/0-5kV)
moving coil rectifier type voltmeter of
class 1.5, provided to read NO LOAD H. T.
voltage.
! 72mm sq. (0-100mA) moving coil rectifier
type A. C. milliammeter of class 1.5,
provide in the earth end of the H. T.
winding to read H.T.Current.
! Automatic tripping circuit is provided for
H. V.TESTER
Oil Cool High Voltage Transformers
2.5 kV - 5 kV Test Set
26
23. isolation of supply, in the event of failure of
the object under test. Rotary switch with
four different settings of 5, 10, 50 &
100mA is provided on front panel with
LED indication.
! M.C.B. for short circuit protection of H.T.
transformer & auto transformer.
! H.T. ON push button, Mains ON & H.T.
transformer & auto transformer
! Range selection switch to select 2.5kV or
5kV range with Led indication.
! Two spring loaded test prods with 1 metre
long cable for safe & easy connection of high
voltage to test object.(Upto 5kV)
! Portable model with minimum table space.
! Two terminals are brought out on back of H. V.
tester for connecting external delayed NC
contact of timer.
H. V.TESTER
1. MINIATURE CIRCUIT BREAKER
2. DIMMERSTAT
3. AUXILIARY TRANSFORMER
4. VOLTAGE RANGE INDICATOR
5. KILO VOLT METER
6. RANGE SELECTOR SWITCH
7. MAIN ‘NO’ LED YELLOW
8. H. T. ON LED RED
9. H. T. ON PUSH BUTTON
10. MAIN RELAY COIL
11. MAIN RELAY
12. HIGH VOLTAGE TRANSFORMER
13. MILLIAMMETER
14. TIMER CONNECTION LINK
15. TRIPPING ADJUSTMENT POT
16. TRIPPING C, Tr.
17. TRIPPING SELECTOR SWITCH
18. TRIPPING INDICATOR
19. EARTH TEST PROD BLACK
20. H. T. TEST PROD RED
21. D’STAT ZERO MICRO SWITCH
22. RECTIFIER
23. TRIPPING RELAY
24. BLEEDER RESISTANCE
CIRCUIT DIAGRAM :
DIMESIONAL DRAWING :
10kV - 30kV TEST SET
500±10
400±5
550 ±10
260 ±5
445±10
2.5kV - 5kV TEST SET
DIMENSIONAL DRAWING :
380
355
210
335
290
TEST
PRODS
NOTE : DIMENSIONS MARKED THIS (’) &
CONSTRUCTION ARE SUBJECT TO
CHANGE IN VOLTAGE & CURRENT RATING
150kV OIL COOLED HIGH VOLTAGE TRANSFORMER
685±6
835 ±6
1890±50*
80
Ø418 *
Ø30
800
1200
750 800
PRIMARY TERMINAL
PRESS
EARTH
SECONDARY TERMINAL BOX
CIRCUITDIAGRAMFOR2.5-5kVH.V.TESTERONLY
21
24
4
14
7
15
10
kV
31
BODY OF
H.V. TESTER
N
23 17
9
16 12
20
19
8
27
24. INDOOR AND OUT DOOR METERING CUBICLES
“Pragati” manufactures INDOOR AND OUT DOOR METERING
CUBICLES rating from 11 KV to 33 KV. The modern Plant
situated at THANE is equipped with full range of testing
equipments and Plant & machinery to manufacture Metering
Cubicles. “PRAGATI” had supplied good numbers of Metering
Cubicles (Both INDOOR & OUT DOOR) to various OEMS in the
country. These Metering Cubicles are working satisfactorily
under different service conditions at the sites.
APPLICATION: Direct measurement of CURRENT / VOLTAGE
in High voltage system is not possible because of insulation
problem of measuring instruments. It is not possible to use direct
CURRENT / VOLTAGE for the system protection purpose due to
its high value and high insulation problem of protective relays.
The Out door type Metering Cubicles are suitable to install on
structure without any Room or Shade. The cubicle is completely
Weather & Dust proof.
The INDOOR & OUTDOOR type Cubicles are Pilfer Resistant
because of its constructional features and its sealing and locking
arrangements. Also the ELECTRONICS LOCK can be provided
to METER Chamber on Special Demand.
The CTs and PTs we are using in the Metering Cubicles are our
own products. PRAGATI was established in 1975, by electrical
engineers having rich experience in the field of design and
manufacturing of Instrument Transformers.
PRAGATI is one of the leading manufacturers of EPOXY RESIN
CAST INDOOR Instrument Transformers (CTs & PTs) in India
100
10
25
75
350350 350 440
785
1405
965
11
8 8
11
SECTIONAL SIDE VIEW
6
7
120
10
12
45
470 350 350 350
775 655
1430
1520
8
4
5
1
2
3
1685
1750
45
ELEVATION
(WITHOUT OPENING)
1490
SECTIONAL PLAN
100
380380
SIDE VIEW
1490 9 3030
1314 1025
75
85.5
PADLOCKING
ARRANGEMENT
LOUVERS
1750
ELEVATION
820 700
75
LOUVERS
28
