ZW30-40.5 Series Outdoor High-Voltage Vacuum Circuit Breaker

ZW30-40.5 40.5kV Outdoor <a href="https://www.weishoelec.com/product/vacuum-circuit-breaker/">Vacuum Circuit Breaker</a> | Weisho Electric

Weisho Electric’s ZW30-40.5 is a high-performance 40.5kV circuit breaker built for outdoor power systems. With a CT17-IVB spring mechanism, it ensures reliable control and protection for substations, power plants, and industrial grids, even under frequent operations.

Sealed with 0.02MPa nitrogen or SF6 gas, this breaker maintains excellent insulation in harsh weather. Its compact design supports up to six current transformers for customized setups, meeting GB1984 and IEC56 standards. In 2024, a Jiangsu substation adopted the ZW30-40.5, reducing downtime by 20% with its rapid reclosing capability.

Parameter	Value
Rated Voltage	40.5kV
Rated Current	2000A
Short-Circuit Breaking Current	31.5kA
Frequency	Three-Phase AC 50Hz
Mechanical Life	10,000 operations
Operating Mechanism	CT17-IVB Spring Mechanism
Ambient Temperature	-40°C to +40°C
Altitude	≤1000m (≤4000m for plateau type)
Protection Level	IP65