VLF Sine Wave 80kV AC Hipot Tester with Tan Delta Test for Medium Voltage Cable Testing

VLF Sine Wave 80kV AC Hipot Tester with Tan Delta Test for Medium Voltage Cable Testing

Applications:

AC withstand voltage test for 35kV and below cables.

AC withstand voltage test for 35kV and below generator.

Dielectric test for 35kV and below cables.

The advantages of using VLF tester for AC withstand voltage test of cables:

AC characteristics: The electric field distribution generated by VLF (usually 0.1Hz) is very close to 50Hz AC power frequency, which can more accurately reflect the operating status of the cable.

Lightweight : Due to its extremely low frequency, the required testing power is greatly reduced (power is proportional to frequency), making the equipment small in size, light in weight, and easy to use on site.

Non destructive diagnosis: It can effectively stimulate and detect typical defects such as "water branches" under AC voltage, and the damage to insulation is much less than that of DC testing.

Technical Index:

1) Output rated voltage , Table 1 for reference

2) Output frequency : 0.1Hz,0.05Hz,0.02Hz,0.01Hz.

3) Loading capability : Table 1 for reference

0.1 Hz maximum 0.35µF(Theoretical value, on-site cable length is less than 2 km)

0.05 Hz maximum 0.7µF(Theoretical value, on-site cable length is 2-5km)

0.02 Hz maximum 1.75µF(Theoretical value, on-site cable length is 5-8km)

0.01 Hz maximum 3.5µF(Theoretical value, on-site cable length is above 8km)

4) Accuracy :± (3% of full scale +0.5 KV)

5) Dielectric loss: ultra-low frequency sine wave voltage range: 1-24 kVrms

Load range: 0.05μF–1μF

Resolution: no less than 1*10^-5

Accuracy: No less than 1*10^-3

Measuring range: 1*10^-4-21000*10^-3

Dielectric loss measurement frequency: 0.1Hz

6) Voltage waveform distortion: ≤5%

7) Condition of use : indoor, outdoor; temperature : -10℃~+40℃; humidity: ≤85%RH

8) Power supply: AC 50 Hz/60Hz,220V ±5%

9) Rated output voltage:

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