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 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.