Capacitor test selection scheme
Moisture (mg/L)
| Cycle | Claim | |
|
66–110kV ≤35 220kV ≤25 330–500kV ≤15 |
During operation, it is recommended to take the oil temperature into consideration. Sampling should be performed when the top oil temperature is above 50°C, and testing should follow GB7600 or GB7601 standards. |
|
Breakdown Voltage (kV)
| Cycle | Claim | |
|
Below 15kV ≥25 15–35kV ≥30 66–220kV ≥35 330kV ≥45 500kV ≥50 |
Testing should be conducted according to GB/T 507 and DL/T 429.9 standards. |
|
Tgδ (90°C) (%)
| Cycle | Claim | |
|
300kV and below ≤4 500kV ≤2 |
The test should be performed in accordance with GB5654. |
|
AC Voltage Withstand Test of Capacitive Voltage Divider of Coupling Capacitor and Capacitive Voltage Transformer
| Cycle | Claim | |
|
When necessary |
The test voltage should be set at 75% of the factory test voltage. |
|
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