Hager General Catalogue 2017-18

1.76

Data is subject to errors and technical modifications.

Miniature Circuit Breakers

Technical Data

Commercial

Distribution

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.

Diversity Factor - Commercial Distribution boards to BS EN 61439-3

Consideration should be given to the proximity heating effect of the breakers when fully loaded and mounted together in groups.

Adjacent circuit breakers having a load 'on' time exceeding 30 minutes or where the load not exceeding 30 minutes has an 'off' time less than the 'on' time, will

need to have the rated diversity factor applied.

No. of Outgoing Circuits

Assumed Loading Factor

2 and 3

0.8

4 and 5

0.7

6 to 9 inclusive

0.6

10 and above

0.5

Frequency

Circuit breakers are designed to operate at a frequency of 50-60Hz. Should the supply differ from this then the following factors should be applied

Thermal – unchanged

Magnetic – value multiplied by coefficient K

F (Hz)

17Hz - 60Hz

100Hz

200Hz

400Hz

1.1

1.2

1.5

Consideration should be given to the proximity heating effect of the breakers when fully loaded and mounted together in groups. (continuously & simultaneously

loaded).

(A) -25ºC -20ºC -15ºC -10ºC -5ºC 0ºC 5ºC 10ºC 15ºC 20ºC 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC 55ºC 60ºC

0.5 0.72 0.7 0.68 0.66 0.64 0.62 0.6 0.58 0.56 0.54 0.52 0.5 0.48 0.46 0.44 0.42 -

1.44 1.4 1.36 1.32 1.28 1.24 1.2 1.16 1.12 1.08 1.04 1

0.96 0.92 0.88 0.84 0.8 0.76

2.88 2.8 2.72 2.64 2.56 2.48 2.4 2.32 2.24 2.16 2.08 2

1.92 1.84 1.76 1.68 1.6 1.52

4.32 4.2 4.08 3.96 3.84 3.72 3.6 3.48 3.36 3.24 3.12 3

2.88 2.76 2.64 2.52 2.4 2.28

5.76 5.6 5.44 5.28 5.12 4.96 4.8 4.64 4.48 4.32 4.16 4

3.84 3.68 3.52 3.36 3.2 3.04

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

13 18.7 18.2 17.7 17.2 16.6 16.1 15.6 15.1 14.6 14.0 13.5 13 12.5 12 11.4 10.9 10.4 9.9

15 21.6 21 20.4 19.8 19.2 18.6 18 17.4 16.8 16.2 15.6 15 14.4 13.8 13.2 12.6 12 11.4

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