The ZN21 circuit breaker originates from Houthalen-Helchteren, Limburg Province, Belgium, incorporating the latest technology at an international advanced level. It is widely used in power plants, grids, metallurgy, petrochemicals, and infrastructure projects such as railways, highways, and airports. The ZN21 complies with IEC standards and fully meets Chinese national standards and industry standards.

Main Features:

The full ZN21 series has passed complete type tests at the National High-voltage Apparatus Quality Supervision and Inspection Center and successfully completed type tests under severe special conditions

ZN21 is an E2-C2-M2 level circuit breaker, with over 30,000 units operating safely in power grids for more than 10 years

High DC component and closing capability: 75% DC component for rated short-circuit breaking current ≤31.5kA; 60% DC component for ≥40kA

Rated insulation level: 1min power frequency withstand voltage 49kV across open contacts, lightning impulse withstand voltage 95kV

High-efficiency CRR1000 spring operating mechanism with 50,000 operations lifespan, ensuring maintenance-free and extremely high reliability throughout the breaker's life (CRR1000 uses German INA bearings and oil-free self-lubricating bearings for smooth operation and low noise)

Professionally designed unsaturated resin insulation cover provides superior insulation performance

The only domestic breaker with contact wear indicator, enabling effective monitoring of operational status

For high-current ZN21 vacuum circuit breakers, rolling connection between the moving end and outgoing arm reduces motion resistance and contact resistance