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B-8
Compact NS630b to NS1600
(1)
The table below indicates the maximum rated-current value for each type of connection, depending on the ambient temperature.
For mixed connections, use the same derating values as for horizontal connections.
Version
Fixed device
Connection Front or horizontal rear
Vertical rear
temp. Ti
(2)
40 45 50 55 60 65 70 40 45 50 55 60 65 70
NS630b N/L
630 630 630 630 630 630 630 630 630 630 630 630 630 630
NS800 N/L
800 800 800 800 800 800 800 800 800 800 800 800 800 800
NS1000 N/L
1000 1000 1000 1000 1000
1000 1000 1000 1000 1000 1000 1000 1000 1000
NS1250 N
1250 1250 1250 1250 1250 1240 1090 1250 1250 1250 1250 1250 1250 1180
NS1600 N
1600 1600 1560 1510 1470 1420 1360 1600 1600 1600 1600 1600 1510 1460
Version
Withdrawable device
Connection Front or horizontal rear
Vertical rear
temp. Ti
(2)
40 45 50 55 60 65 70 40 45 50 55 60 65 70
NS630b N/L
630 630 630 630 630 630 630 630 630 630 630 630 630 630
NS800 N/L
800 800 800 800 800 800 800 800 800 800 800 800 800 800
NS1000 N/L
1000 1000 1000 1000 1000 1000 920 1000 1000 1000 1000 1000 1000 990
NS1250 N
1250 1250 1250 1250 1250 1170 1000 1250 1250 1250 1250 1250 1250 1090
NS1600 N
1600 1600 1520 1480 1430 1330 1160 1600 1600 1600 1560 1510 1420 1250
Compact NS1600b to 3200
Version
Fixed device
Connection Front or horizontal rear
Vertical rear
temp. Ti
(2)
40 45 50 55 60 65 70 40 45 50 55 60 65 70
NS1600b N
1600 1600 1600 1600 1500 1450 1400 1600 1600 1600 1600 1600 1550 1500
NS2000 N
2000 2000 2000 2000 1900 1800 1700 2000 2000 2000 2000 2000 1900 1800
NS2500 N
2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500 2500
NS3200 N
-
-
-
-
-
-
-
3200 3200 3200 3180 3080 2970 2860
(1)
For a circuit breaker mounted in horizontal position, the derating to be applied is equivalent to that of a front or horizontal rear connected circuit breaker.
(2)
Ti: temperature around the circuit breaker and its connections.
Temperature derating
Compact NS devices equipped
with electronic trip units
Installation
recommendations
Compact circuit breakers have been tested for
operation in industrial atmospheres.
It is recommended that the equipment be cooled or
heated to the proper operating temperature and kept
free of excessive vibration and dust.