Three Phase Indoor Vacuum Circuit Breaker High Voltage Side Mounted AC 50HZ 12KV 3150A
3AV5-12/1250-31.5 Indoor High-voltage Vacuum Circuit Breaker
3AV5 circuit breaker series is indoor high-voltage switchgear, suitable for rated voltage 12 kV, frequency 50 Hz three-phase power system, as protection and control appliances, with high reliability, easy operation, simple maintenance and other characteristics. The circuit breaker can be used for middle-type switchgear and fixed switchgear as well as oil-free transformation. Because of the special advantages of vacuum circuit breaker, it is especially suitable for frequent operation requiring rated current, or many times to break the short-circuit current. The 3AV5 vacuum circuit breaker has three installation modes: fixed type, extraction type and side mounted. For special requirements, please contact the manufacturer.
Technical Parameters:
| Items | Unit | Date | |||
| Rated voltage |
KV |
12 | |||
| Rated impulse withstand voltage | 75 | ||||
| Rated short-time power frequency withstand voltage (1min) | 42 | ||||
| Rated frequency | Hz | 50~60 | |||
| Rated short-circuit breaking current | KA | 20 | 25 | 31.5 | 40 |
| Rated current | A |
630 1000 1250 |
630 1000 1250 1600 |
1250 1600 2000 2500 |
1600 2000 2500 3150 4000 |
| Rated short-time withstand current | KA | 20 | 25 | 31.5 | 40 |
| Rated peak tolerable current | 50 | 63 | 80 | 100 | |
| Rated short-circuit making current (peak value) | 50 | 63 | 80 | 100 | |
| Secondary circuit power frequency withstand voltage (1min) | V | 2000 | |||
| Rated operation sequence |
O－0.3S－CO－180S－CO O－180S－CO－180S－CO (at 40KA) |
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Rated single/back-to-back capacitance bank breaking current Set breaking current
|
A | 630/400 (40KA 800/400) | |||
| Rated short-circuit breaking current DC flow percentage | ≤35% | ||||
| Opening time (rated voltage) | ms | 20-50 | |||
| Closing time (rated voltage) | ms | 30-70 | |||
| Mechanical life | times | 20000 | |||
| Rated short-circuit breaking current breaking times | times | 50 (40KA 30) | |||
| Allowable wear accumulate thickness of moving and static contacts | mm | 3 | |||
| Rated closing operating voltage | v | AC110/220 DC110/220 | |||
| Rated opening operating voltage | v | AC110/220 DC110/220 | |||
| Rated voltage of energy storage motor | v | AC110/220 DC110/220 | |||
| Rated power of energy storage motor | w | 80 | |||
| Contact opening distance | mm | 11±1 | |||
| Contact stroke | mm | 3.5±1 | |||
| Contact bounce time | ms | ≤2 (40KA ≤3) | |||
|
Three - phase opening and closing heterogeneity |
ms | ≤2 | |||
| Average closing speed *1 | m/s | 0.9-1.3 | |||
| Average closing speed*2 | m/s | 0.4-0.8 | |||
| Main circuit resistance | μΩ |
≤50 (630A) ≤45 (1250A) ≤35 (1600-2000A) ≤25 (above 2500A) |
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