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B-13
Installation
recommendations
Temperature derating
The table below indicates the maximum current rating,
for each connection type, as a function of Ti around the
circuit breaker and the busbars.
Circuit breakers with mixed connections have the same
derating as horizontally connected breakers.
For Ti greater than 60 °C, consult us.
Ti: temperature around the circuit breaker and its
connection.
Version
Drawout
Fixed
Connection Front or rear horizontal
Rear vertical
Front or rear horizontal
Rear vertical
Temp. Ti
40 45 50 55 60 40 45 50 55 60 40 45 50 55 60 40 45 50 55 60
NT06 H1/H2/L1 630
630
630
630
NT08 H1/H2/L1 800
800
800
800
NT10 H1/H2/L1 1000
1000
1000
1000
NT12 H1/H2
1250
1250
1250
1250
NT16 H1/H2
1600
1520 1480 1430 1600
1560 1510 1600
1550 1600
NW08 N/H/L
800
800
800
800
NW10 N/H/L
1000
1000
1000
1000
NW12 N/H/L
1250
1250
1250
1250
NW16 N/H/L
1600
1600
1600
1600
NW20 H1/H2/H3 2000
1980 1890 2000
2000
1920 2000
NW20 L1
2000
1900 1850 1800 2000
– – – – –
– – – – –
NW25 H1/H2/H3 2500
2500
2500
2500
NW32 H1/H2/H3 3200
3100 3000 2900 3200
3200
3200
NW40 H1/H2/H3 4000
3900 3750 3650 4000
3850 4000
3900 3800 4000
NW40b H1/H2 4000
4000
4000
4000
NW50 H1/H2
5000
5000
5000
5000
NW63 H1/H2
– – – – –
6300
6200 – – – – –
6300
Power dissipation and input / output
resistance
Total power dissipation is the value measured at I
N
,
50/60 Hz, for a 3 pole or 4 pole breaker (values above
the power P = 3RI
2
).
The resistance between input / output is the value
measured per pole (cold state).
Version
Drawout
Fixed
Power dissipation (Watts)
Input/output resistance (µohm) Power dissipation (Watts)
Input/output resistance (µohm)
NT06 H1/H2/L1 55/115 (H1/L1)
38/72
30/45
26/39
NT08 H1/H2/L1 90/140 (H1/L1)
38/72
50/80
26/39
NT10 H1/H2/L1 150/230 (H1/L1)
38/72
80/110
26/39
NT12 H1/H2
250
36
130
26
NT16 H1/H2
460
36
220
26
NW08 N1
137
42
62
19
NW08 H/L
100
30
42
13
NW10 N1
220
42
100
19
NW10 H/L
150
30
70
13
NW12 N1
330
42
150
19
NW12 H/L
230
27
100
13
NW16 N1
480
37
220
19
NW16 H/L
390
27
170
13
NW20 H/L
470
27
250
13
NW25 H1/H2/H3 600
19
260
8
NW32 H1/H2/H3 670
13
420
8
NW40 H1/H2/H3 900
11
650
8
NW40b H1/H2 550
7
390
5
NW50 H1/H2 950
7
660
5
NW63 H1/H2 1200
7
1050
5
Temperature derating
Power dissipation and
input / output resistance
version: 8.3
207E3300.indd