I. Overview
ZW□-12 Permanent magnet type outdoor high-voltage vacuum circuit breaker adopt the permanent magnet mechanism with a unique design and high reliability. The circuit breaker is mainly used in 10kV of medium-voltage overhead line grid, for interrupting and closing the load current, overload current and short circuit current. The product is mainly used in urban, agricultural, substation and industrial and mining enterprises distribution system.
2. Structural characteristics
◇ The product is mainly composed of integrated pole column, current transformer, permanent magnetic operating mechanism and tank. The product is a miniaturized design with high quality stainless steel casing.
◇ The operating mechanism is equipped with manual handle for emergency switching on/off, which is used for emergency operation in the case of control or power system failure.
◇ Product and controller support an intelligent control unit, can realize switching operation in place, and can be operated by remote control through the communication interface, too. Information can be transferred to the control center, the communication channel can choose cable, optical fiber, GPRS/CDMA, GSM and so on.
Main technical parameters
Serial number | Project | Unit | Numerical value |
1 | Rated voltage | kV | 12 |
2 | Rated current | A | 630 |
3 | Rated frequency | Hz | 50 |
4 | Power frequency withstand voltage1min | kV | 42 |
5 | Lightning impulse withstand current (peak value) phase-to-phase and to ground/Fracture surface | kV | 75 |
6 | Rated short-circuit breaking current | kA | 20/25 |
7 | Rated short-circuit closing current (peak value) | kA | 50/63 |
8 | Rated peak withstand current | kA | 50/63 |
9 | 4SShort-time withstand current | kA | 20/25 |
10 | Rated operating cycle | 分－0.1s－合分－6s－合分-6s合分-60s恢复 | |
11 | Rated short-circuit current breaking times | 次 | 30 |
12 | Mechanical life | time | 30000 |
13 | The permanent magnet mechanism controls the voltage | V | DC220 |
