Product

ZN□ (SRM6)-12(V)/630-20 Inflatable cabinet circuit breaker (with isolation whithout grounding)

Product Overview This circuit breaker is mainly used in gas-insulated switchgear. Adopting a clamping plate structure, it features easy and convenient installation, reliable breaking performance, long service life and maintenance-free operation. It is an ideal alternative product to vacuum circuit breakers for gas-insulated switchgear. The product performance complies with the requirements for Class E2-M2-C2 circuit breakers specified in GB1984-2014 AC High-Voltage Circuit Breakers. Share:

Model and Its Designation

Precautions for Service Environment Conditions
● Altitude: Not exceeding 2000 m; Seismic intensity: Not exceeding Grade 8
● Ambient air temperature: Ranging from -45°C to +50°C. Relative humidity: Daily average not exceeding 95%, monthly average not exceeding 90%
● Not suitable for installation sites with frequent severe vibrations, nor for sites where water vapor, gases, chemically corrosive deposits, salt mist, dust and dirt that obviously affect the performance of the mechanism exist, as well as sites with fire or explosion hazards
● Rated SF₆ gas pressure: 0.04 MPa. The SF₆ gas complies with the requirements specified in GB/T12022-2014 Industrial Sulfur Hexafluoride
Technical Parameters

Item	Unit	Technical Parameters
Rated Voltage	KV	12
Rated Frequency	Hz	50
Rated Current	A	630
Rated Short-Time Withstand Current	KA	20/25
Rated Peak Withstand Current	KA	50
Rated Short-Circuit Duration	s	4
Rated Short-Circuit Making Current	KA	50
Theoretical Operation	Times	10000
Main Circuit Resistance	μΩ	≤60
1-minute Power-Frequency Withstand Voltage	KV	38（in the air）