Product

ZN□(SMR6)- 12/630-25 Air cabinet circuit breaker Switchgear

Product Overview The ZN□(SMR6)-12/630-25 gas-insulated switchgear circuit breaker features the advantages of easy installation, low maintenance, long service life, small size, cost-effectiveness, safety and reliability. This product complies with the technical requirements specified in GB/T 1984 High-voltage Alternating Current Circuit Breakers. The main circuit is rated for 630 A, 20 kA (4 s), 25 kA (3 s) with a mechanical endurance of 10,000 operations. The earthing circuit is rated for 20 kA (2 s) with a mechanical endurance of 2,000 operations. Share:

Notes on Ambient Operating Conditions
Altitude shall not exceed 2000 m; seismic intensity shall not exceed Grade 8.
The ambient temperature for product operation shall range from -40℃ to +50℃; the daily average relative humidity shall not be greater than 90%, and the monthly average relative humidity shall not be greater than 90%.
The product is not suitable for installation sites subject to frequent severe vibrations, nor for sites with water vapor, gaseous chemical corrosive deposits, salt mist, dust and dirt that obviously affect the performance of the mechanism, as well as sites with fire or explosion hazards.
Main Technical Parameters

Item	Unit	Parameters
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	0-0.3s-CO-180s-CO