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Additional information
Electrical characteristics
Designingconnections
y
630A
Compact circuit breakersNSX100 to630
Cables
Schneider Electric provides cabling recommendations according to the rating
of the circuit breaker.
The size of cables must be selected according to:
b
b
the level of current
b
b
the ambient temperature around the conductors
b
b
the degree of protection for the switchboard.
When mounting Schneider Electric prefabricated connections, short terminal shields
can be used or not if the function is already integrated in prefabricated connections.
Note:
For some devices, it is recommended to use Schneider Electric prefabricated connections.
If not, switchgears must be equipped with long terminal shields for personnel safety.
Compact NSX100 to NSX250
Copper cable, withstand temperature = 105 °C
Devices
Rated current of a circuit I
nc
(A)
Ambient temperature around the switchboard
25 °C
30 °C
35 °C
40 °C
45 °C
50 °C
IP
y
55
NSX100
TMD-TMG
Size
50 mm²
50 mm²
50 mm²
50 mm²
50 mm²
50 mm²
I
nc
(A)
100
97.5
95
92.5
90
85
NSX125
TMD-TMG
Size
70 mm²
70 mm²
70 mm²
70 mm²
70 mm²
70 mm²
I
nc
(A)
125
122
119
116
113
100
NSX160
(1)
TMD-TMG
Size
95 mm²
95 mm²
95 mm²
95 mm²
95 mm²
95 mm²
I
nc
(A)
160
156
152
147
144
140
NSX250
(1)
TMD-TMG
Size
120 mm²
120 mm²
120 mm²
120 mm²
120 mm²
120 mm²
I
nc
(A)
250
244
238
231
225
198
NSX100
STR
Size
50 mm²
50 mm²
50 mm²
50 mm²
50 mm²
50 mm²
I
nc
(A)
100
100
100
100
100
100
NSX160
STR
Size
95 mm²
95 mm²
95 mm²
95 mm²
95 mm²
95 mm²
I
nc
(A)
160
160
160
160
160
160
NSX250
(2)
STR
Size
120 mm²
120 mm²
120 mm²
120 mm²
120 mm²
120 mm²
I
nc
(A)
250
250
237.5
237.5
225
225
(1)
For a withdrawable NSX160 or NSX250 equipped with a Vigi or an insulation-monitoring
module, multiply the In values by 0.9.
(2)
For a withdrawable NSX250 equipped with a Vigi or an insulation-monitoring module, multiply
the In values by 0.86.
Compact NSX400 to NSX630
In case of cable connection
Cable connection is not recommended if the cable sizes are too large. Choose
insulated flexible bar (see table opposite and list of insulated flexible bars).