Page 203 - B_ELSB_Cat_2022_01_MCBs

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MCBs technical details
Performances at different ambient temperatures

Max. operating current depending on the ambient temperature of S800U
U-K, Ambient temperature T (°C)
Z,
UCZ
I (A) –25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40 45 50 55 60
e
10 11,8 11,7 11,5 11,3 11,1 10,9 10,7 10,6 10,4 10,2 10 9,8 9,6 10 9,3 9,1 8,9 8,7
13 15,4 15,1 14,9 14,7 14,4 14,2 14 13,7 13,5 13,2 13 12,8 12,5 13 12 11,8 11,6 11,3
16 19 18,5 18,5 18 18 17,5 17 17 16,5 16,5 16 15,5 15,5 16 15 14,5 14 14
20 23,5 23,5 23 22,5 22 22 21,5 21 20,5 20,5 20 19,5 19,5 20 18,5 18 18 17,5
25 29,5 29 28,5 28 28 27,5 27 26,5 26 25,5 25 24,5 24 25 23 22,5 22 22
32 38 37,5 36,5 36 35,5 35 34,5 34 33 32,5 32 31,5 31 32 29,5 29 28,5 28
40 47,5 46,5 46 45 44,5 43,5 43 42 41,5 40,5 40 39,5 38,5 40 37 36,5 35,5 35
50 59 58,5 57,5 56,5 55,5 54,5 53,5 53 52 51 50 49 48 50 46,5 45,5 44,5 43,5
63 74,5 73,5 72 71 70 69 67,5 66,5 65,5 64 63 62 60,5 63 58,5 57 56 55
80 95 93 92 90 89 87 86 84 83 82 84 79 77 76 74 73 71 70
100 118 117 115 113 111 109 107 106 104 102 100 98 96 95 93 91 89 87

Max. operating current depending on the ambient temperature of S804U - PVSP5, - PVS5
- PVSP5, - PVS5 Ambient temperature T (°C)
I (A) –25 –20 –15 –10 –5 0 5 10 15 20 25 30 35 40 45 50 55 60
n
5 6,50 6,40 6,30 6,20 6,10 6,00 5,90 5,80 5,70 5,60 5,50 5,40 5,30 5,2 5,10 5,00 4,90 4,80
Influence of mounting distances between the devices
Multiply the rated current referring to your max. occurrent temperature with the factor of “influence of mounting distances”.
Example: 2 x S802B-B125 at T = 40 °C with distance
I = 120.4 A x 92.1 % = 110.9 A
n
100.0%

Percentage of operating current I
90.0% 6 A to 32 A
95.0%

40 A to 63 A
80 A to 125 A

85.0%

80.0%
0 5 10 15 20 25
Influence of mounting distances [mm]
Further influencing factors, which can lead to a reduction of the maximum operating current, are:
- Shortening the cable lenght compared to IEC 60947-1/2
- Reducing the cable cross section compared to IEC 60947-1/2
- Accumulation of cables