NRFP Series PD Free Variable Frequency HV Power Source

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.

Capacity (kVA)	5	10	30	50	75	100
Rated input voltage (V)	AC220V 50Hz		Three-phase AC 380V±10% 50Hz
Rated output power (kW)	5	10	30	50	75	100
Rated output frequency range (Hz)	30Hz ~ 300Hz continuously adjustable.
Rated output voltage (V)	0-190V		Single-phase output 0 ~ 350V/ Three-phase output 0～300V continuously adjustable.
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%
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.

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.

产品严格按照国际、国家标准及行业规程生产，通过国家、各省级、市级电力研究所、计量中心及电力权威部门的检测，以下为校准证书及检定证书样本。

注：电缆交流耐压谐振试验产品参数及外观仅供参考，参数与型号如有变动，恕不另行通知，咨询热线：027-84828685。

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NRFP Series PD Free Variable Frequency HV Power Source

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