1. Overview
ZW□-12 box-type outdoor vacuum circuit breaker is the outdoor high-voltage vacuum breaker with rated voltage of 12kV, three-phase, AC 50Hz. It is mainly used for interrupting and closing the load current, overload current and short circuit current in electric system. The product is mainly used in urban, agricultural, substation and industrial and mining enterprises distribution system.
2. Structural characteristics
◇ flexible operation, convenient: The new design of small hand-electric integrated spring mechanism, with functions of automatic storage, switch closing, opening driven by electricity, while such functions can also be realized manually.
◇ Reliable Sealing Performance: the use of mature sealing structure technology to ensure good air impermeability.
◇ Excellent insulation performance: the outgoing bushing is synthesized by APG process, with sufficient insulation distance and safe operation.
◇ Maintenance-free: The main circuit and secondary components are sealed by SF6 (0 gauge pressure), and unaffected by the external environment.
Main technical parameters
Number | name | Unit | Parameters | ||
1 | Rated voltage | kV | 12 | ||
2 | Rated Insulation Level | 1minRated power frequency withstand voltage | 42(alternating and relative to the ground) / 48(fracture and isolation fracture) | ||
Rated lightning impulse withstand voltage (peak value) | Alternating and facing the ground | 75 | |||
Fracture surface | 85 | ||||
3 | Rated current | A | 630 | ||
4 | Rated short-circuit breaking current | kA | 20/25 | ||
5 | Rated short-circuit closing current (peak value) | 50/63 | |||
6 | Rated dynamic stability current (peak value) | 50/63 | |||
7 | Rated thermal stability current (effective value) | 20/25 | |||
8 | Rated short-circuit breaking current frequency | time | 30 | ||
9 | Rated thermal stabilization time | s | 4 | ||
10 | The secondary circuit has a 1-minute power frequency withstand voltage | kV | 2 | ||
11 | Mechanical life | time | 10000 | ||
12 | Weight | kg | 160 | ||
