Description
ZW8 12kV Outdoor Vacuum Circuit Breaker Overview
The ZW8 is a three-phase AC 50 Hz outdoor vacuum circuit breaker for 12 kV distribution systems. The existing page identifies switching of load, overload, and short-circuit current, with controller-based reclosing available as a configuration.
Published Ratings
- Rated voltage: 12 kV
- Rated frequency: 50 Hz
- Rated current: 630 A
- Opening time: 5 ms
Operating Conditions
- Maximum altitude: 2,000 m
- Ambient temperature: -40°C to 45°C
- Maximum wind speed: 34 m/s
- Maximum earthquake intensity: 8
- Maximum monthly average relative humidity: 90%
- Maximum daily average relative humidity: 95%
- Maximum ice thickness: 10 mm
- Pollution degree: Class IV
- Condensation may occur when temperature drops rapidly
Selection Guidance
Confirm the rated current and short-circuit configuration, controller and reclosing requirements, operating sequence, auxiliary supply, mounting arrangement, and site conditions.
Model and Installation Information
FAQ
What voltage and current are listed?
12 kV and 630 A.
What opening time is listed?
5 ms.
Can reclosing be configured?
The existing page describes controller-based reclosing as a configuration.
What outdoor temperature range is listed?
-40°C to 45°C.
What is needed for selection?
Provide fault level, controller functions, sequence, auxiliary supply, mounting, and site conditions.
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