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ZW8-12 Series Outdoor high voltage vacuum circuit breaker
Technical parameters
Main Technical Data | ||||
Rated voltage | kv | 12 | ||
Rated lighting impulse withstand voltage | kv | Interphase or to ground 75,fructure 80 | ||
Rated short-time power frequency withstand voltage(dry) | kv | Interphase or to ground 42,fructure 48 | ||
Rated short-circuit breaking current | kA | 25 | 31.5 | 40 |
Rated current | A | 630/1250 /1600 | 1250/1600 /2000/2500 | 1600/2000 /3150 |
Rated thermostability current(valid) | kA | 25 | 31.5 | 40 |
Rated dynamic stability current(peak) | kA | 63 | 80 | 100 |
Rated short-circuit making current(peak) | kA | 63 | 80 | 100 |
Rated operations of short-circuit breaking current interruption | times | 50(40kA is 30) | ||
Rated working current of overcurrent and tripping coil | A | 5 | ||
Rated operating sequence | 0-0.3-CO-180s -CO/ 0-180s-CO-180s-CO(40KA) | |||
Mechanical life | times | 10000 | ||
Rated current of auxiliarate switch | A | AC10,DC5 | ||
Rated voltage of energy saving release | v | AC,DC220 AC,DC110 | ||
Closing time | ms | ≤75 | ||
Opening time | ms | ≤60(40) | ||
Power of energy saving motor | w | 275 | ||
Energy saving time | s | ≤15 | ||
Mechanical life | times | 20000 |
Mechanical characteristics adjustment data
1.Rated contact stroke mm 11±1;
2.Contact overtravel mm 8±2;
3.Average opening speed m/s 1.0~1.8;
4.Average closing speed m/s 0.6~1.1 0.8~1.3 0.8~1.3;
5.Contact bouncing duration at closing operation ms ≤2;
6.Core distance between phases mm 210,230,250,275;
7.Three-pole simultaneity ms ≤2;
8.Condactive circuit resistance of each phases μΩ <40.
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ZW8-12 Outdoor high voltage vacuum circuit breaker