Page 204 - B_ELSB_Cat_2022_01_MCBs

1/204 ELECTRICAL INSTALL ATION SOLUTIONS FOR BUILDINGS - TECHNICAL DETAILS 9AKK 107991 A8329
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MCBs technical details
Performances at different ambient temperatures

2. Multiply the rated current (equivalent) referring to the new temperature by another factor only in case of presence
of several devices installed alongside each other; see table.

Example: S 202 C 16 with T=40 °C
Type of use Values to use Formula Calculation Result
Load at ambient temperature I (amb. t°) -see tables- I =15.5 A
n
n
Load at ambient temperature with 8 adj. I (amb. t°) -see tables- Fm I (amb. t°)x0.77 15.5x0.77 I =11.94 A
n
n
n
devices (0.77)
No. of adjacent devices Fm
S200, DS200, DDA200+S200 Influence of
adjacent devices Correction factor Fm 1 1.00
No. of adjacent devices Fm 2, 3 0.9
1 1 4, 5 0.8
2 0.95 > 6 0.75
3 0.9
SN201 Influence of adjacent devices Correction factor Fm
4 0.86
5 0.82 No. of adjacent devices Fm
6 0.8 1 1.00
7 0.78 2 0.99
8 0.77 3 0.97
4 0.96
9 0.76
>9 0.76 5 0.94
6 0.93
7 0.92
S300 Influence of adjacent devices Correction factor Fm
8 0.91
No. of adjacent devices Fm
9 0.90
1 1.00
> 9 0.90
2, 3 0.9
4, 5 0.8
≥ 6 0.75 DS201 Influence of adjacent devices Correction factor Fm
No. of adjacent devices Fm
1 1.00
SU200 M Influence of adjacent devices Correction factor Fm
2 0.95
No. of adjacent devices Fm
3 0.91
1 1.00 4 0.88
2, 3 0.9
5 0.87
4, 5 0.8 6 0.86
> 6 0.75
7 0.85
> 7 0.85
Influent of adjacent devices for S200C series
S200 80-100A Influence of adjacent devices Correction factor Fm
Number of devices Fm DS202CR Influence of adjacent devices Correction factor Fm
2 or 3 0.9
Number of devices Fm
4 or 5 0.8 2 or 3 0.9
6 to 9 0.7
4 or 5 0.8
> 10 0.6
6 to 9 0.7
> 10 0.6