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4.18
Data is subject to errors and technical modifications.
Residential
Distribution
Miniature Circuit Breakers
Technical Information
Connection
The circuit breaker can have the line\load connected to either the top or bottom terminals
Temperature Derating
MCBs are designed and calibrated to carry their rated current and to operate within their designated thermal time/current zone at 30ºC. Testing is carried out with
the breaker mounted singly in a vertical plane in a controlled environment. Therefore if the circuit breaker is required to operate in conditions which differ from the
reference conditions, certain factors have to be applied to the standard data.
I
n
(A)
-25ºC -20ºC -15ºC -10ºC -5ºC 0ºC 5ºC 10ºC 15ºC 20ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC 55ºC 60ºC
6
8.64 8.4 8.16 7.92 7.68 7.44 7.2 6.96 6.72 6.48 6.24 6
5.76 5.52 5.28 5.04 4.8 4.56
10 14.4 14 13.6 13.2 12.8 12.4 12 11.6 11.2 10.8 10.4 10 9.6 9.2 8.8 8.4 8
7.6
16 23 22.4 21.8 21.1 20.5 19.8 19.2 18.6 17.9 17.3 16.6 16 15.4 14.7 14.1 13.4 12.8 12.2
20 28.8 28 27.2 26.4 25.6 24.8 24 23.2 22.4 21.6 20.8 20 19.2 18.4 17.6 16.8 16 15.2
25 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19
32 46.1 44.8 43.5 42.2 41 39.7 38.4 37.1 35.8 34.6 33.3 32 30.7 29.4 28.2 26.9 25.6 24.3
40 57.6 56 54.4 52.8 51.2 49.6 48 46.4 44.8 43.2 41.6 40 38.4 36.8 35.2 33.6 32 30.4
50 -
-
-
-
-
62 60 58 56 54 52 50 48 46 44 42 40 38
63 -
-
-
-
-
-
-
-
-
-
-
63 60.5 58 55.4 52.9 50.4 47.9