Vacuum circuit breaker ZW64-145

gas-insulatedvoltageautomatic

Overview
ZW64-145 vacuum circuit breaker provides three-pole trip, close and fast automatic reclosing operations. It is designed to make and break no-load, load and fault currents. The device uses a vacuum interrupter and supports operation in low-temperature environments down to -40°C. External insulation uses pure N2 enabling a fluorine-free design. Seismic rating AG5. Mechanical life 10,000 operations. Primary and secondary interfaces match existing SF6-filled AC circuit breakers for high interchangeability.

Categories

• High-voltage solutions
• Circuit breakers

Main features

• Three-pole trip, close and fast automatic reclosing
• Capable of breaking and making no-load, load and fault currents
• Vacuum interrupter suitable for -40°C operation
• Pure N2 external insulation for fluorine-free design
• Seismic rating AG5
• Mechanical life up to 10,000 operations
• Primary and secondary interfaces compatible with SF6-filled AC circuit breakers

Projects & applications

• Awarded August 2022: procurement project for the Italian national power company
• Commissioned November 2023 at Southern Grid Zhaoqing Shengyuan substation

Technical specifications

• Model: ZW64-145
• Interruption medium: vacuum interrupter
• External insulation: pure N2 (fluorine-free)
• Operating ambient temperature: down to -40°C
• Seismic rating: AG5
• Mechanical life: 10,000 operations
• Interfaces: primary and secondary interfaces same as SF6-filled AC circuit breakers