The AC Resonance Test System under UHV power can help many power workers conduct various power tests more conveniently.

600kVA/120kV Cable AC Resonance Testing System Reactor Usage Relationship Table

Electric motor, generator, AC withstand voltage test, capacitance range 0.0555~0.111uf, test frequency 60Hz, test voltage 120kV.

Take a frequency of 60Hz

I=2πfCUtest=2π×60×0.111×10-6×120×103=5.0 A

Related reactor inductance L==1/ω 2C=63.4H

Based on the above test voltage, current, frequency, and inductance, design 12 series cable AC resonance test system reactors to meet the above test requirements and objectives, with a single reactor of 50kVA/20kV/2.5A/21H

Verification 1.

Electric motor, generator, AC withstand voltage test, capacitance range 0.0555uF, test frequency 60Hz, test voltage 120kV.

When 6 reactors are connected in series in the cable AC resonance testing system, the inductance is 21 * 6=126H

Test frequency f=1/2 π√ LC=1/(2 × 3.14 × √ 126 × 0.0555 × 10-6)=60.2Hz

Test current I=2 π fCUTEST=2 π × 60.2 × 0.0555 × 10-6 × 120 × 103=2.5A

Verification 2.

Electric motor, generator, AC withstand voltage test, capacitance range 0.111uF, test frequency 60Hz, test voltage 120kV.

When 6 reactors are connected in series and 2 groups are connected in parallel, the inductance is (21 * 6)/2=63H

Test frequency f=1/2 π√ LC=1/(2 × 3.14 × √ 63 × 0.111 × 10-6)=60.2Hz

Test current I=2 π fCU Test=2 π × 60.2 × 0.111 × 10-6 × 120 × 103=5.0A

Conclusion: The device capacity is 600kVA/120kV; 12 reactors, each with a capacity of 50kVA/20kV/2.5A/21H, can meet the testing requirements when used in combination.