To upgrade a electrical equipment by using products suitable for the particular application or in special environmental conditions.
If it is considered as proper when the standard MCCB/ELCB is not chosen to use in a special characteristic of the load, or various environment conditions, the special breaker is needed.
These breakers include various types. In case of depending on a kind and a characteristic of the load, no standard MCCBs are used.
As a result of making a DSN switch by omitting the overcurrent tripping device of a MCCB, it is used as a switching device having high operating capacities.