ZW32-12 Outdoor Vacuum Circuit Breaker
12kV | 630A | 20kA | Outdoor Medium Voltage Power Distribution Equipment
The ZW32-12 Outdoor Vacuum Circuit Breaker (VCB) is a three-phase AC outdoor switching device designed for 12kV medium voltage power distribution systems with a rated frequency of 50Hz.
It is mainly used for load current switching, overload protection, and short-circuit current interruption in power systems. The circuit breaker is widely applied in substations, industrial and mining enterprises, rural power grids, and outdoor distribution networks for reliable control and protection of medium voltage electrical systems.
With a compact structure, lightweight design, maintenance-free operation, and excellent environmental adaptability, the ZW32-12 vacuum circuit breaker can operate reliably under harsh weather conditions and polluted outdoor environments.
The ZW32-12 adopts a compact and lightweight design, reducing installation space requirements while maintaining reliable electrical performance.
The vacuum interrupter provides excellent arc extinguishing performance, ensuring safe and stable interruption of:
- Load current
- Overload current
- Short-circuit current
The sealed structure minimizes maintenance requirements and improves service reliability, reducing operation costs and downtime.
Designed for outdoor applications, the circuit breaker features:
- Anti-condensation performance
- Dust and pollution resistance
- Stable operation under harsh climatic conditions
The ZW32-12 supports:
- Manual operating mechanism
- Electric operating mechanism
An optional isolation switch and current transformer configuration are available according to project requirements.
ZW - 32 - 12 / T - 630 - 20 - G - □
| Symbol | Description |
|---|---|
| ZW | Outdoor vacuum circuit breaker |
| 32 | Design series |
| 12 | Rated voltage (kV) |
| T | Spring operating mechanism |
| 630 | Rated current (A) |
| 20 | Rated short-circuit breaking current (kA) |
| G | With isolation switch |
| S / D | Manual operation / Electric operation |
| Parameter | Unit | Value |
|---|---|---|
| Rated Voltage | kV | 12 |
| Rated Frequency | Hz | 50 |
| Rated Current | A | 630 |
| Rated Short-Circuit Breaking Current | kA | 20 |
| Rated Peak Withstand Current | kA | 50 |
| Rated Short-Time Withstand Current | kA | 20 |
| Rated Short-Circuit Making Current (Peak) | kA | 50 |
| Mechanical Endurance | Operations | 10,000 |
| Short-Circuit Breaking Operations | Operations | ≥30 |
| Power Frequency Withstand Voltage (1 min) | kV | 42/48 |
| Lightning Impulse Withstand Voltage | kV | 75/85 |
| Secondary Circuit Withstand Voltage (1 min) | kV | 2 |
The ZW32-12 outdoor vacuum circuit breaker consists of the following main components:
- Vacuum interrupter
- Insulation tube
- Conductive terminal
- Flexible connection
- Insulation pull rod
- Contact pressure spring
- Opening spring
- Drive connecting board
- Mechanism output shaft
- Operating mechanism
- Enclosure box
- Current transformer
The ZW32-12G model integrates an isolation switch for enhanced operation safety and maintenance convenience.
- Operating handle
- Isolation spindle
- Circuit breaker manual operating handle
- Circuit breaker energy storage handle
- Open/close indication mechanism
- Connector plug
- Current transformer
- Insulator
- Isolation switch
- Insulation pull rod
- Wiring board (incoming terminal)
- Isolation blade
- Wiring board (outgoing terminal)
- Circuit breaker body
The ZW32-12 outdoor vacuum circuit breaker is suitable for:
- Medium voltage outdoor distribution networks
- Utility power distribution systems
- Substations
- Industrial and mining enterprises
- Rural power grid upgrading projects
- Pole-mounted switching stations
- Distribution automation systems
✔ Reliable 12kV medium voltage switching solution
✔ Vacuum arc extinguishing technology
✔ Compact and lightweight outdoor design
✔ Long mechanical service life up to 10,000 operations
✔ Suitable for harsh environmental conditions
✔ Manual and electric operation options
✔ Optional isolation switch and CT integration
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