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Why there is a difference in the Service breaking capacity (Ics) values of manually and electrically operated Compact NS>630.

Published date: 04 September 2020

The difference is due to the design of the Circuit Breakers. The Compact NS>630 manual basic frame (bloc cut) is different from NS electrical basic frame (bloc cut).
 
Ics depends on breaker type. Electrically operated Compact NS>630 is developed from Masterpact NT breaker because there is no option for adapting the motor mechanism on Compact NS>630.
 
The breaking performances of NT are less than Compact NS, hence it cannot be declared that the Ics values of electrically operated Compact NS>630 is same as manually operated Compact NS>630.
 
This is the reason why the service breaking capacity (Ics) values of manually operated and electrically operated Compact NS>630 MCCB are different.

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