Industrial ZW32-12/1250-25 Outdoor Vacuum Circuit Breaker 12kV

ZW32-12/1250-25 Outdoor High Voltage Vacuum Circuit Breaker

The ZW32-12/1250-25 is an upgraded outdoor pole-mounted vacuum circuit breaker strictly engineered for heavier distribution loads. Built on the proven pole-column platform of the 630A model, this unit delivers a higher continuous current rating and stronger interruption capability. It stands as the recommended choice for infrastructure projects requiring higher fault current capacity without transitioning to larger frame sizes.

Core Applications

Rated at 1250A continuous current with a 25kA short-circuit breaking capacity, this breaker is engineered for rigorous industrial environments. It serves as a reliable protective solution for main feeders, industrial distribution networks, and substation exit protection where higher fault current handling is mandatory.

Key Technical Specifications

• Rated voltage: 12 kV

• Rated current: 1250 A

• Rated short-circuit breaking current: 25 kA

• Rated peak withstand current: 63 kA

• Rated short-time withstand current (4s): 25 kA

• Rated insulation level: 1min power frequency 42kV / lightning impulse 75kV

• Mechanical life: 10,000 operations

• Rated short-circuit breaking current interrupting times: 30 times

• Mounting type: Pole-mounted (outdoor)

• Standards compliance: IEC 62271-100, GB/T 1984

Design and Operational Advantages

The breaker utilizes silicone rubber insulated poles to provide robust outdoor insulation performance, while an integrated isolation switch ensures safe maintenance access for technicians. For environments demanding extended durability, an optional permanent magnetic operating mechanism is available, extending the mechanical life up to 20,000 operations. Capable of withstanding harsh environments, the ZW32-12/1250-25 delivers uninterrupted service across a wide operating temperature range of -40°C to +45°C and altitudes up to 2000m.

FAQ

Q1: What is the ZW32-12/1250-25 vacuum circuit breaker used for?

The ZW32-12/1250-25 is specifically designed for heavier distribution loads. It serves as a protective solution for main feeders, industrial distribution networks, and substation exits that require a higher 25kA fault current capacity without utilizing larger frame sizes.

Q2: ZW32-12/1250-25 vs 630A Vacuum Circuit Breaker

Q3: How to safely isolate the ZW32-12/1250-25 for maintenance?

• Verify the breaker is completely open to interrupt the 1250A continuous current.

• Engage the integrated isolation switch to guarantee a visible break for safe maintenance access.

• Ensure the silicone rubber insulated poles are clear of debris.

• Follow IEC 62271-100 safety protocols strictly.