NRFP Series PD Free Variable Frequency HV Power Source can be used for AC withstand voltage and partial discharge test of all electrical equipment. The excitation transformer is used to excite a series or parallel resonant circuit. By adjusting the output frequency of the variable frequency power supply to make resonance occur between the reactor inductance L and the sample capacitance C in the circuit. The resonance voltage is the voltage applied to the sample. Or directly output to the transformer primary through an intermediate transformer for an induced voltage withstand test.
The variable frequency power supply is the main component in the complete test system which is applicable to:
(1) AC withstand voltage and partial discharge tests for transformers etc.
(2) AC withstand voltage test of power cables.
(3) AC withstand voltage test of GIS composite apparatus.
(4) AC withstand voltage test of capacitive equipment such as circuit breakers disconnectors insulators bushings etc.
Overview
NRFP Series PD Free Variable Frequency HV Power Source can be used for AC withstand voltage and partial discharge test of all electrical equipment. The excitation transformer is used to excite a series or parallel resonant circuit. By adjusting the output frequency of the variable frequency power supply to make resonance occur between the reactor inductance L and the sample capacitance C in the circuit. The resonance voltage is the voltage applied to the sample. Or directly output to the transformer primary through an intermediate transformer for an induced voltage withstand test.
The variable frequency power supply is the main component in the complete test system which is applicable to:
(1) AC withstand voltage and partial discharge tests for transformers etc.
(2) AC withstand voltage test of power cables.
(3) AC withstand voltage test of GIS composite apparatus.
(4) AC withstand voltage test of capacitive equipment such as circuit breakers disconnectors insulators bushings etc.
Models
|
Capacity (kVA) |
5 |
10 |
30 |
50 |
75 |
100 |
|
Rated input voltage (V) |
AC220V 50Hz |
Three-phase AC 380V±10% 50Hz |
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|
Rated output power (kW) |
5 |
10 |
30 |
50 |
75 |
100 |
|
Rated output frequency range (Hz) |
30Hz ~ 300Hz continuously adjustable. |
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|
Rated output voltage (V) |
0-190V |
Single-phase output 0 ~ 350V/ Three-phase output 0～300V continuously adjustable. |
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|
Rated output current (A) |
26.3 |
52.6 |
85.7/57.7 |
142.8/96.2 |
214.2/144.3 |
285.7/192.4 |
|
Frequency instability (%) |
≤0.05% |
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|
Voltage instability (%) |
≤1.0% |
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|
Nonlinear distortion (%) |
≤1% |
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|
Partial discharge (pC) |
≤ 10pC (measured at the high-voltage side of the booster transformer). |
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|
Working conditions |
Temperature - 10 ℃~+45 ℃ humidity: 10-90% RH altitude: ≤1000m. |
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|
Cooling method |
Forced air cooling. |
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|
Capacity (kVA) |
150 |
200 |
250 |
300 |
400 |
500 |
|
Rated input voltage (V) |
Three-phase AC 380V±10% 50Hz |
|||||
|
Rated output power (kW) |
150 |
200 |
250 |
300 |
400 |
500 |
|
Rated output frequency range (Hz) |
30Hz ~ 300Hz continuously adjustable. |
|||||
|
Rated output voltage (V) |
Single-phase output 0 ~ 350V/ Three-phase output 0～300V continuously adjustable. |
|||||
|
Rated output current (A) |
428.5/288.6 |
571.4/384.9 |
714.2/481.1 |
857.1/577.3 |
1142.8/769.8 |
1428.5/962.2 |
|
Frequency instability (%) |
≤0.05% |
|||||
|
Voltage instability (%) |
≤1.0% |
|||||
|
Nonlinear distortion (%) |
≤1% |
|||||
|
Partial discharge (pC) |
≤ 10pC (measured at the high-voltage side of the booster transformer). |
|||||
|
Working conditions |
Temperature - 10 ℃~+45 ℃ humidity: 10-90% RH altitude: ≤1000m. |
|||||
|
Cooling method |
Forced air cooling. |
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