Application

The Impulse voltage generator test system is mainly suitable for testing 36KV or below instrument transformer lightning impulse voltage set.

Woking condition:

1.Altitude≤1000m

2.Environment temperature: －5℃~40℃

3.Relative humidity≤90%

4.Installation place: indoor type

5.Ground resistance＜0.3Ω

Test equipment included in the test system

400KV/30KJ Full wave impulse device, 400kV Chopping device, 400KV Capacitive voltage divider, LGR-100/50 Rectifier Transformer, Measurement&control system(including Lighting impulse voltage Test Bench, TDS3012C Oscilloscope, IPM-24 Peak volmeter, 2 pcs Attenuator , printer, control&measurement software, etc.)

1.  Impulse voltage generator (400kV/30kJ)

u Main technical parameters

u Nominal lightning impulse voltage: 400kV

u Nominal capacity (energy): 30kJ

u Capacitance per stage: 1.5μF, 100kV

u Voltage per stage: ± 100kV

u Number of stages/ Capacity per stage: 4 /7. 5kJ

u Output waveform:

u 1.2±30%/50±20%μ S standard lightning impulse voltage full wave, oscillation amplitude at peak value≤5%

u Min. output voltage≤10 %Un

u Generator efficiency≥ 90%;

u Triggering range: ≥ 20%

u Working Duration:

u continuous operation ＞70％Un, charge&discharge every 90s

u continuous operation ＜70％Un, charge&discharge every 60s

u The instability of output peak voltage≤1.0 %, the lowest output ≤10% of the nominal voltage of the device.

u Malfunction rate while synchronous discharge＜2 ％

u ignition range: 10％～100％

2. Rectifier charging power supply

u Rated voltage:  Un = 100kV DC (Positive or negative polarity)

u Rated current:  In = 100mA (Under rated voltage)

u Voltage control: Controllable constant current charge, regulate range 0~100% Un

u Polarity conversion: Auto convert path of high voltage silicon stack

u Input voltage: 220V, single-phase

u Frequency: 50/60Hz

u Power supply capacity: 5kVA

u power supply resistance: 3 pcs

3. Low damping capacitive voltage divider

u Model: 400kV/400pF

u Rated voltage: 400kV

u Rated capacitance: 400pF

u Stage of capacitor: 1 stage

u Capacitance per stage: 400pF

u Square wave response: Partial response time is less than 100ns, overshoot is less than 20%

u Voltage division uncertainty: Less than 1%

4. Chopping device

u Rated Voltage: 400kV

u Sphere gap type: Diameter 300mm hemisphere gap

u Time delay mode: 2-6us time delay adjustable circuit provide chopping trigger pulse.

u Chopping wave dispersibility: Chopping wave time standard error is less than 0.1us.

u Sphere gap Qty: 2 pcs

u chooped wave resistance 1 pc

5. Signal analyze auto-testing system

u Waveform test: TDS3012C digital oscilloscope

Max. sample rate 1.0GS/s, 100MHz bandwidth, resolution 8bit

        Record length 2.5K byte, 2 channels

u Waveform analyzation:

   Industrial control computer and LCD display

        Impulse test software

        Display and calculate impulse waveform parameters

        Waveform comparison function

        Waveform amplification, shrink and translation

        Store and invoking of waveform

        Auto-generated test report in picture format

6. Accessories

u 2pcs of high performance 100 times specialized attenuator

u Isolation filter shielding design

u 3 groups wave head resistance (4pcs/group)

u 3 groups wave tail resistance (4pcs/group)