| Breaking Capacity: | High Voltage Circuit Breakers |
|---|---|
| Operation: | Electric Type |
| Speed: | Normal Type Circuit Breaker |
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| NO. | Name | Unit | Dada | ||
| 1 | rated voltage | kV | 40.5 | ||
| 2 | rated current | A | 1250 1600 2000 | ||
| 3 | rated frequency | Hz | 50 | ||
| 4 | rated short-circuit breaking current | kA | 20 25 31.5 | ||
| 5 | rated short-circuit closing current | kA | 50 63 80 | ||
| 6 | rated peak withstand current | kA | 50 63 80 | ||
| 7 | rated short-time withstand current | kA | 20 25 31.5 | ||
| 8 | rated short-circuit duration | s | 4 | ||
| 9 | rated operation sequence | 0-0.3s-CO-180s-CO | |||
| 10 | short-circuit breaking current in remote ground fault condition | kA | 17.54 21.93 27.6 | ||
| 11 | rated insulation leval |
1 min power frequency withstand voltage(peak value) | dry test | kV | 95 |
| wet test | kV | 85 | |||
| rated lighting impluse withstand voltage | kV | 185 | |||
| 12 | opening time | ms | <=100 | ||
| 13 | mechanical endurance | cycles | 10000 | ||
| 14 | breaking operations of rated short circuit breaking current | cycles | 20 | ||
| No. | Name | Unit | Data | |
| 1 | clearance between open contacts | mm | 20±2(central type) | |
| 22±2(lateral type) | ||||
| 2 | over travel of contacts | mm | 4±1 | |
| 3 | allowed wear thickness of contacts | mm | 3 | |
| 4 | average closing speed | m/s | 0.6±0.2 | |
| 5 | average opening speed (befiore contact oil buffer) | m/s | 1.6±0.2 | |
| 6 | contact bouncing duration at closing operation | ms | <=3(31.5kA) <=3(20~25kA) | |
| 7 | synchronism of closing contact | ms | <=2 | |
| 8 | un-synchronism of opening contact | ms | <=2 | |
| 9 | bouncing amplitude of opening contact | mm | <=3 | |
| 10 | closing time | ms | 50<=t<=120 | |
| 11 | opening time | max and rated voltage | ms | 20<=t<=60 |
| min rated voltage | ms | 20<=t<=60 | ||
| 12 | closing-opening time | ms | <=100 | |
| 13 | contact pressure | N | 3100±200 | |
| 14 | main circuit resistance | μΩ | <=50(without transformer) | |
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