high voltage reactor/ test system

1. AC Voltage Test System with Resonant Reactor
Applications The main advantage of resonant test systems is the low
power demand, because only the losses in the test circuit
Resonant Test Systems is applied for the generation of must be replaced from the power supply. The quality
a continuously variable alternating (AC) voltage of a fixed factor Q which is the relation between the test power S
frequency (mainly 50 or 60 Hz) for high-voltage (HV) and the loss power P ranges between Q = 10 and values
routine, type and development testing of capacitive test up to 100, this means only 10 to 1 % of the test power
objects. They can also be applied for HV on-site tests, but must be supplied. A resonant test system is remarkably
POWER offers for that application the more economic lighter, cheaper and more economic than an AC
solution of frequency-tuned resonant test systems transformer test system and should be applied if the test
. objects are capacitive. In case of a disruptive discharge
Capacitive test objects are cables, capacitors, gas the test object is not destroyed, because the systems
insulated switchgear (GIS), but also large rotating goes out of resonance. POWER resonant test systems
machines, instrument and power transformers (for applied are characterized by a very modern system configuration
voltage tests). Resonant test systems enable not only and have proven highest reliability.
HVAC tests at 50/60 Hz, but also at higher or lower
frequency (10-300 HZ) and dynamic tests with fast Tunable inductance reactor modules for series resonant
voltage changes (e. g. for capacitors). Because of their circuits are available between 250 and 1200 kV and test
precise sine-wave, resonant test systems are very well power between 1000 and 20000 kVA
suited for the combinations of HVAC withstand tests with
partial discharge (PD) measurement. POWER adapts the Tunable frequency modules for series resonant circuits
resonant test systems to the requirements of the relevant are available between 100 and 1600 kV and test power
standards and the demand of the customer. between 50 and 9000kVA.(Typical Frequency adjustment
between 20-300 Hz)
1600kV 10A Module Tunable 350kV 10A Tank Type Tunable 1000kV 5A Tunable Frequency
Reactor Resonant System Reactor Resonant System Reactor Resonant System(Oil
immersed Type)

2. Fig. 1:
Principle circuit diagrams (Te-exciter
transformer; RT and RL-loss resistors;
L-variable inductance; THV-HV
transformer; C-test object; RP and
RS-loss resistors; CO-basic load)
Fundamentals
The connection of an HV reactor (inductance L) to an capacitive test object (C) forms an oscillating circuit with the natural
frequency.
f = 1/2π √ LC.
By a variable inductance this frequency can be tuned to that of the power supply (e. g. 50 Hz) which means resonance
(Fig. 1). The capacitive test power S exceeds the feeding power P according to the quality factor Q. The quality factor Q of
the whole circuit is the combination of that of the test system QA and that of the test object QP by:
Q = QA × QP / (QA + QP) (1)
For the more important series resonant circuits (Fig. 1a) resonance is connected with the increase of the voltage from the
exciting voltage Ue to the test voltage U:
U = Q × Ue. (2)
Parallel resonant circuits can be understood as HV current compensation by a variable inductance in parallel to a HV
test transformer (Fig. 1b). In that case the voltage is determined by the ratio of the HV transformer. Parallel resonance is
only applied if capacitances or losses of the test object are not stable (e. g. at rotating machines) or if the tests include
dynamic processes.
The inductance of the HV reactor can be varied only in a certain range (e. g. Lmax = 20 Lmin), for series resonance circuits
the load capacitance can be varied in a corresponding limited load range (Cmax = 20 Cmin). The system must be equipped
with a basic load capacitor CO >Cmin which enables no-load operation, but reduces the test object capacitance to (Cmax –
CO). Fig. 2 shows the load voltage characteristic for a system with two taps at the reactor, each corresponding to a certain
inductance and voltage. In the double logarithmic load-voltage characteristic (Fig. 2) both, powers S and currents I, are
given by straight lines. When the system is e. g. be designed according to the constant current of I1, the hatched area
cannot be used because of too high current I2. A clear definition of the necessary load-voltage requirement including duty
cycle is the basis for an economic selection of a resonant circuit.

3. Fig. 2: Load-voltage characteristic of a series resonant system with a reactor of two taps
Standards：
GB10229 《 Reactor 》
JB/T964.1 《Test Transformer》
GB1094.3 《Electric Transformer》Third Part Insulation Level and Insulation Test
GB/T 16927.1 《High Voltage Test Technology》 First Part Common Test Requirements
GB/T 16927.2 《High Voltage Test Technology》 Second Part Measurement System
GB/7354 《Partial Discharge Test》
GB/7328 《Transformer and Reactor’s Sound Level Measurement》
JB 8749 《Voltage Regulator’s General Technologies’ Requirements》
JB/T8638 《Voltage Regulator Test Guidelines》First Part
JB/T563 《Coupling Capacitor and Capacitor Divider Placing Order Technology Requirement》
GB2536 《Transformer Oil》
Ambient Conditions for the AC Test Equipment
- Height above sea level ≤1000 m
for each add. 100 m, the HV rating must be decreased by 1%
- Relative humidity in main hall under non condensing conditions 90 %
- Temperature averaged over 24 h for H.V. components min. 0 °C, max. + 30 °C
- Extreme temperatures for H.V. components min. - 5 °C, max. + 40 °C
- Temperature for electronic controls
(equipment to operate with the specified measuring errors) min. + 15 °C, max. + 25 °C

4. The test system includes following main components:
1. Tunable series resonant reactor (50Hz/60Hz) of (20-300Hz)
2. Voltage Regulator (50Hz/60Hz) or Tunable Frequency Power Source (20-300Hz)
3. Capacitive Voltage Divider (adding Inductance is a High Voltage Filter)
4. Resonant capacitor（also coupling capacitor for PD Measuring System）
5. Manual or Automatic Control and Measuring System
6. Power Noise Filter (50Hz/60Hz)
7. Exciter transformer
Available Options
Air-cushion base frame (AeroGo)
HV filter inductance for coupling capacitor
Additional HV connections
Partial Discharge detectors
Other devices upon request
Technical Data
Tunable Inductance Reactor:
Type Rated Power Rated current Rated Voltage Weight
(kVA) (A) (kV) (kg)
XZL-300/200 300 1.5 200 2325
XZL-250/250 250 1 250 2675
XZL-500/250 500 2 250 2890
XZL-350/350 350 1 350 4520
XZL-400/400 400 1 400 4600
XZL-800/400 800 2 400 4750
XZL-1200/400 1200 3 400 7500
XZL-600/600 600 1 600 5250
XZL-1200/600 1200 2 600 7200
XZL-1800/600 1800 3 600 9600
XZL-2400/600 2400 4 600 15510
XZL-800/800 800 1 800 9600
XZL-1600/800 160 2 800 9900
XZL-3200/800 3200 4 800 19650

5. Tunable Frequency Reactor:
Rated Rated Rated Nominal Frequency Weight
Type Power Current(A) Voltage(kV) Inductance(H) Range(Hz) (kg)
(kVA)
XZF-200/200 200 1 200 600 850
XZF-250/250 250 1 250 800 1450
XZF-500/250 500 2 250 400 1850
XZF-400/400 400 1 400 1200 2200
XZF-800/400 800 2 400 640 2800
XZF-1600/400 1600 4 400 329 3100
XZF-2400/600 2400 4 600 480 20-300 4100
XZF-3600/600 3600 6 600 320 4300
XZF-3200/800 3200 4 800 600 5200
XZF-4800/800 4800 6 800 400 6000
XZF-6250/250 6250 25 250 35 5100
XZF-3750/250 3750 15 250 60 4750
XZF-2500/250 2500 10 250 90 3900
XZF-1250/250 1250 5 250 150 2200
For further information please contact:
Power Electric Co ., Ltd
Add: No.9 longchuan North Road, Jiangdu,Yangzhou City, Jiangsu province,China
Tel: :+86-514-86688088
Fax: 86- 514-86688588
E-mail: sales@powerhv.com
Http:// www.powerhv.com