1. Overview
ZW□-12 three-phase pillar 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
◇ Has a new compact design with fully sealed structure, which lead to good sealing performance, and can improve the moisture, rust-proof performance.
◇ Adopt the new miniaturized vacuum interrupter, ceramic shell, stable and reliable breaking performance, less contact wear.
◇ Adopt a new type of spring operating mechanism, novel structure, compact, small volume, reliable operation.
Main technical parameters
Serial number | Name | Unit | Parameters | ||
1 | Rated voltage | kV | 12 | ||
2 | Rated Insulation Level | 1minRated power frequency withstand voltage | 42(Alternate and face each other)／48(Fracture surface and isolation fracture surface) | ||
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 | 次 | 30 | ||
9 | Rated thermal stabilization time | s | 4 | ||
10 | Secondary circuit1minPower frequency withstand voltage | kV | 2 | ||
11 | Mechanical life | time | 10000 | ||
12 | Weight | kg | 100 | ||
