Product Overview

This operating mechanism is mainly used for the ZW20-12 outdoor pole-mounted high-voltage vacuum circuit breaker and can also be applied to other outdoor or indoor vacuum circuit breakers with equivalent closing power. Its performance complies with GB1984 "AC High-voltage Circuit Breakers."

Performance Features

Mechanism lifespan: 12,000 operations

Voltage levels: AC220V, DC220V, AC110V, DC110V, DC48V, DC24V

Closing parameters: Reliable closing at 85%–110% of rated voltage; no closing in 5 attempts at 30% of rated voltage

Electrical anti-pumping function and manual soft closing/opening function

Opening parameters: Reliable opening at 65%–110% of rated voltage; no opening in 5 attempts at 30% of rated voltage

Operating Environment

Ambient air temperature: Maximum +60°C; Minimum –40°C

Altitude: ≤4,000 m; Wind speed: ≤35 m/s

Relative humidity: Daily average ≤95%; Monthly average ≤90%

Installation site: Free from fire, severe pollution, corrosion, or violent vibration