Large Capacity Complete Testing Device

We test the short-circuit current switching ability of AC circuit breakers, fuses, and DC circuit breakers using two methods: synthesis and direct testing. We can help you set up the test loop and provide solutions.

Description
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Large capacity complete testing device

Used to test the short-circuit current switching ability of AC circuit breaker, fuse, DC circuit breaker, two methods:

synthesis and direct test. We can provide users with solutions for test loop.

Capacitor bank of power source

Application

In the synthesis test, capacitor bank is used as the pre-charged unit of the synthesis test loop to provide recovery voltage:

Transient recovery voltage (TRV) of opening circuit breaker is simulated in cooperation with the TRV for synthesis test.

Cooperate with AC reactor for oscillating discharge to obtain short-time AC high voltage, and simulate AC recovery voltage (PFRV) of opening circuit breaker.

Main data

Rated voltage/capacitance of single capacitor: 100 kV/3 µ F;

Single-layer voltage: 100kV, 12 layers maxi; ©Pneumatic operation for capacitor switching and series-parallel connection between layers.

Charging device of capacitor bank

Used as the DC charging power supply of capacitor bank. Composed of AC power supply, DC charging

device, measure& control system.

Application

Used as the DC charging power supply of capacitor bank. Composed of AC power supply, DC charging device, measure& control system.

Main data

l Input voltage: AC380V, or 10kV;

l Output voltage: 100-1200kV;

l Output current: 1-500mA;

l Automatic polarity reversal.

Ignition sphere

It is used for main circuit link device of synthesis circuit to introduce voltage during test. Composed

of sphere, front-end acquisition unit, synchronous control unit and ignition unit.

Arc extension loop

It is used to avoid extinguishing arc in advance on sample when current crosses zero in the circuit of

synthetic test, arc time of the circuit breaker can be the same as that of the rated voltage at dropped

voltage.It is composed of main circuit, charging power supply and control part.

Application

It is used to avoid extinguishing arc in advance on sample when current crosses zero in the circuit of synthetic test, arc time of the circuit breaker can be the same as that of the rated voltage at dropped voltage. It is composed of main circuit, charging power supply and control part.

Loop includes: capacitor bank, resistor, ignition sphere and isolating circuit

Main data

l Capacitor bank is charged by the charging power supply. Control part includes: front-end acquisition unit, synchronous control unit, trigger unit, etc.

l Voltage of current source: 13.2kV

l Arc extension current: customized on request;

l Average delay:≤ 40 us;

l Jitter,≤6 us.

TRV frequency modulation device

Regulate waveform of TRV (transient recovery voltage) after breaking the short-circuit current from

test object of circuit breaker, isolation switch or fuse, and simulate working condition of circuit breaker

after breaking the short-circuit fault current.

Application

Regulate waveform of TRV (transient recovery voltage) after breaking the short-circuit current from test object of circuit breaker, isolation switch or fuse, and simulate working condition of circuit breaker after breaking the short-circuit fault current.

Main data

l It consists of FM capacitor bank, FM resistor and FM reactor. Two-parameter and four-parameter TRV waveform regulating can be realized by changing the wiring;

l Pneumatic operation for capacitor, FM resistor and inter layer switching;

l Voltage: 3.6kV- 40.5kV

l for direct circuit and 10kV- 1100kV

l for synthetic circuit

Arc extension loop

It is used to avoid extinguishing arc in advance on sample when current crosses zero in the circuit of

synthetic test, arc time of the circuit breaker can be the same as that of the rated voltage at dropped voltage.

It is composed of main circuit, charging power supply and control part.

TRV frequency modulation device

Application

Switching test for AC breaker with rated voltage3.6-40.5kV.

Switching test for AC switch with 3-phase or single-phase.

Main data

l Circuit breaker and disconnector test, direct test method;

l Pneumatic operation for capacitor, damping resistor and interlayer switching;

l Overhead lines, cables, single capacitor bank;

l 3-phase 3.6kV-40.5kV / 1-1600A;

l Single phase 3.6kV-40.5kV / 1-2500A;

l Back-to-back single-phase and ground fault;

Regulate waveform of TRV (transient recovery voltage) after breaking the short-circuit current from test

object of circuit breaker, isolation switch or fuse, and simulate working condition of circuit breaker after

breaking the short-circuit fault current.

Regulate waveform of TRV after breaking short current from test object of circuit breaker, isolation switch

or fuse.It consists of FM capacitor bank, FM resistor and frequency-modulated reactor. By changing wiring

to regulate two or four-parameter TRV waveform.

Capacitive load device

switching test for AC breaker with rated voltage3.6~40.5kV. switching test for AC switch with 3-phase

or single-phase

LC oscillating circuit current source

Application

Used for the near-field fault breaking test of circuit breaker as synthetic test loop to provide voltage required by near-field fault test.

Main data

l Includes: pulse capacitor bank,reactor,charging power supply, closing switch, measure & control system and accessories;

l Charging voltage of capacitor: customized on request;

l Peak current: 1 0kA-200kA;

l Attenuation rate:≥93%;

l Frequency: 10Hz-60Hz

■ LC oscillating current source for valve test

■ LC oscillating current source for DC breaker

■ LC oscillation current for LV switch test

Artificial Iink of near-field fault test

Used for the near-field fault breaking test of circuit breaker as synthetic test loop to provide voltage

required by near-field fault test.

Application

Fault breaking current test for converter valve and DC breaker by using the current rising rate of discharge waveform from LC oscillation circuit. .

Main data

l Link can be designed as π -type or mathematic link;

l Voltage: 15kV-800kV;

l Current: 25kA-63kA;

l Mode: L90, L75, L60;

High-power braided resistor

Braided resistor has a wide range of applications, especially suitable for high-voltage system as load resistor,

such as DC & AC resistor, filter resistor, neutral grounding resistor, damping resistor, charge and discharge

resistor, making & braking and regulating resistor, high frequency resistor and heavy load resistor.

50kΩ/315kW high power resistor（long-term）

Application

Braided resistor has a wide range of applications, especially suitable for high-voltage system as load resistor, such as DC & AC resistor, filter resistor, neutral grounding resistor, damping resistor, charge and discharge resistor, starting&braking and regulating resistor, high frequency resistor and heavy load resistor.

Main data

l Non-inductive winding, low inductance;

l Excellent heat dissipation;

l Accurate resistance value;

l High power;