Overview

The ZN63A-12 type indoor high-voltage vacuum circuit breaker is an indoor switchgear for three-phase AC 50Hz power systems with a rated voltage of 12kV, serving as a protection and control unit for power grid equipment and power equipment in industrial and mining enterprises. It is suitable for applications requiring frequent operation or multiple AC short-circuit current interruption at rated operating current.

The circuit breaker adopts an integrated design of the operating mechanism and the circuit breaker body, which can be used as a fixed installation unit or equipped with a dedicated propulsion mechanism to form a handcart unit.

Model Meaning

Conditions of Use

Ambient temperature: not higher than +40℃ and not lower than -15℃ (storage and transportation are not allowed at -30℃);

Altitude: Not exceeding 1000m;

Relative humidity: daily average not exceeding 95%, monthly average not exceeding 90%; average saturated vapor pressure not exceeding 2.2 x 10⁻³ MPa; monthly average not exceeding 1.8 x 10⁻³ MPa.

Earthquake intensity: not exceeding magnitude 8;

Locations free from fire, explosion, severe pollution, chemical corrosion, and violent vibration.

Main technical parameters

Appearance and installation dimensions (mm)