EPHIPOT EPCZ-560kVA/40kV AC Resonance Test System (560kVA ;40kV)

Rated output voltage: Rated output voltage: 0～40kV

Resonant voltage waveform: sine wave, waveform distortion rate <1.0%

Maximum tested product current: 1.75A 14A

Maximum test capacity: 560kVA

Output frequency: 30～300Hz

Working time: Continuous working time is 60min under full power output

Quality factor: 30～90

Input working power: Three-phase 380V±5%, 50Hz

Ambient temperature: -15℃～+40℃

Relative humidity: <90RH%, no condensation

Altitude: <5000m

Noise: ≤50dB

The system is consisted by below units：

-Variable Frequency Power supply

-Exciting Transformer

-HV Reactor

-Capacitive Divider

-Accessories Carrycase (connection wires)

Application and requirement:

1. Meet the 15.6kV/1000MVA generator AC withstand voltage test, capacitance≤1.4uF, test frequency 45~65Hz, test voltage U≤34.8kV (2Un+3). Test time: 1 minute

2. Meet 10kV/300mm2 cable AC withstand voltage test, capacitance≤1.12uF, test frequency 30~300Hz, test voltage U≤22kV. Test time: 5 minutes

3. Meet 35kV/300mm2 cable AC withstand voltage test, capacitance≤0.398uF, test frequency 30~300Hz, test voltage U≤52kV. Test time: 60 minutes

4. Meet the AC withstand voltage test of 10kV transformer, switch, etc., capacitance ≤0.0006uF, test frequency 30~300Hz, test voltage U≤35kV. Test time: 1 minute.

Device capacity determination:

The capacity of the equipment is designed to be 560kVA/40kV divided into 8 reactors, and the single reactor is 40kV/1.75A/70H in combination to meet the test requirements of the above-mentioned tested product.

Conclusion determination:

1. 15.6kV/1000MW generator, electric capacity ≤1.4μF, test frequency 45-65Hz, test voltage 34.8kV.

Use 8 reactors in parallel, at this time the inductance is L=70/8=8.6H

Test frequency f=1/2π√LC=1/(2×3.14×√8.6×1.4×10-6)=45.2Hz.

Test current I=2πfCUTest =2π×45.2×1.4×10-6×34.8×103=13.77A

When 8 reactors are used in parallel, the maximum current is 14A, so 14A>13.77A, this set of equipment can meet the requirements of the above tested product.

2. 15.6kV/10MW generator, electric capacity ≤0.1μF, test frequency 45-65Hz, test voltage 34.8kV.

Use 1 reactor, at this time the inductance is L=70

Test frequency f=1/2π√LC=1/(2×3.14×√70×0.1×10-6)=60Hz.

Test current I=2πfCUTest =2π×60×0.1×10-6×34.8×103=1.15A

The maximum current of 1 reactor is 1.75A, so 1.75A>1.15A, this set of equipment can meet the requirements of the above tested product.

Conclusion: The device capacity is set to 560kVA/40kV, divided into 8 reactors, and the single reactor is 40/1.75A/70H in combination to meet the test requirements of the tested product.