110kV Neutral Grounding Protection Device for Transformer
Product introduction:
This kind of transformer neutral protection device adopts modular construction.
It has been running well in high altitude area over decades year.
Item | Description | Offered | ||
1 | Type | TJZB-110 | ||
2 | TR rated voltage | kV | 110 | |
3 | Power frequency voltage | kV | 95 | |
4 | Lightning impulse voltage withstand | kV | 250 | |
5 | Metal-oxide surge arrester | Type | Y(H)1.5W-72/186 | |
Rated voltage | kV | 72 | ||
Residual voltage at lightning impulse | kV | ≯186 | ||
Residual voltage at switching impulse | kV | ≯174 | ||
Reference voltage at D.C. 1mA | kV | ≮103 | ||
Leakage current at 0.75U1mA | μA | ≯50 | ||
6 | Disconnect switch | Rated voltage | kV | 72.5 |
Rated current | A | 630 | ||
Operation mechanism | Motor/ Manual | |||
Rated short-time current withstand | kA | 31.5 | ||
Rated peak current withstand | kV | 80 | ||
7 | Current transformer | Rated voltage | kV | 10 |
Rated insulation level | 42/75 | |||
Rated dynamic current | kA | 110 | ||
8 | Discharge gap | Gap type | Ball/ Rod | |
Power frequecny discharge voltage | kV | 83±10% | ||
Impulse discharge voltage | kV | ≯215 | ||
Gap distance | mm | 60~100 adjustable | ||
9 | Monitor | Type | JCQ-CⅠ | |
Current measurement range | mA | 0~5 | ||
Operation current range | A | 50~20000 |