Capacitor test selection scheme

Moisture mg/L

cycle Claim

66～110kV ≤35

220kV ≤25

330～500kV ≤15

During operation, the temperature should be taken into account when measuring. Try to sample when the top oil temperature is higher than 50 °C, and test according to GB7600 or GB7601.

Breakdown voltage kV

cycle Claim

Below 15kV ≥25

15～35kV ≥30

66～220kV ≥35

330kV ≥45

500kV ≥50



Test according to GB/T507 and DL/T429.9 methods

Tgδ(90°C)%

cycle Claim

300kV and below ≤4

500kV ≤ 2

Test according to GB5654

AC voltage withstand test of capacitive voltage divider of coupling capacitor and capacitive voltage transformer

cycle Claim

when necessary

The test voltage is 75% of the factory test voltage

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