How many types of instantaneous short-circuit integrated in Masterpact MTZ

MasterPact MTZ circuit breakers integrate two types of instantaneous short-circuit
protection :

1: A “DIN” (Instantaneous override protection) active when the circuit breaker is closed.
The DIN is activated above Icw. It operates on the instantaneous value of the current.

2: A “DINF”(Instantaneous making over-current voltage release) intended to
instantaneously trip the circuit breaker in case of closing on a short-circuit current higher
than its threshold. The DINF operates on the instantaneous value of the current. The
DINF is disabled around 50 ms after the circuit breaker closing.

Released for:Schneider Electric India