Product Features

• The solid-insulation-embedded pole vacuum interrupter is used to realize maintenance-free of products;
• The level of salt spray resistance test is up to 300 hrs;
• Use the German INA customized copper-based high-pressure alloy oil-free bearings;
• The passivation surface treatment process of zinc-cobalt alloy hexavalent chromium in Malaysia is introduced;
• The design of mechanism is optimized, with comprehensive strength and rigidity at leading level;
• Mechanical life of 30,000 cycles;
• The spring mechanism is self-contained with energy-storage lever, both convenient and expedient.

Structural Characteristics

Overview

• The main circuits of ZN139-12/G-type vacuum circuit breakers are in form of solid-insulation-embedded pole. The operating mechanisms are divided into two types: spring-operated type and permanent magnet type.
• The ZN139-12 / G-type vacuum circuit breaker products can be used separately, or used in the mid-set switchgear and fixed switchgear.

Insulation Form

• The ZN139-12/G vacuum circuit breaker is in overall structure of front-and-rear arrangement of the actuator and the primary conductive circuit. The main electrical circuit part is in three-phase floor-type structure.