01
Purpose of Use
1
Key Technical Parameters
2
NXB-63 and NXB-63H series miniature circuit breakers are mainly used
for the circuit of AC 50Hz or 60Hz with rated voltage of 240V or 415V and
rated current of 63A, which provide overload and short-circuit protection
and are also used as the infrequent making/breaking operation of the circuit
under normal conditions.
Table 1 Key Technical Parameters
Altitude
Pollution level
Installation category
Rated operating voltage
Ue(V)
Rated short-circuit
breaking capacity I
cn
Enclosure protection class
≤
2000m
Level 2
Class II and III
AC 220V or 230V or 240V (1P, 1P+N, 2P)
AC 380V or 400V or 415V (2P, 3P, 3P+N, 4P)
6000A, 10000A (H Type)
IP20
