Page 191 - B_ELSB_Cat_2022_01_MCBs

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MCBs technical details
MCBs internal resistance, power loss and max. permissible earth-fault
loop impedance

S800S - S800N - S800C
Maximum permissible earth-fault loop impedance Z at U 230 V* to ensure compliance with
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the requirements of IEC 60364-4.
The instantaneous release of the MCB ensures an operating time of max. 0.1 s (TN system).
Determined according to IEC 60364-5-52 / VDE 0100-520 and DIN VDE 0100-520 sheet 2:2002
(source impedance 300 mW, c = 0.95 and conductor temperature 70 °C = factor 0.8).
The internal resistance of the MCB is included. Values below 10 A are available upon request.

* U : rated voltage against earthed conductor; for U : AC 240 V multiply Z by 1.04, for U : AC 254 V multiply Z by 1.10,
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for U : AC 400 V multiply Z by 1.74
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Rated current (A) B C D K
max. Zs (Ω)
10 4.8 2.4 1.5 1.5
13 3.7 1.8 1.1 1.1
16 3.0 1.5 0.9 0.9
20 2.4 1.2 0.7 0.7
25 1.9 1.0 0.6 0.6
32 1.5 0.7 0.5 0.5
40 1.2 0.6 0.4 0.4
50 1.0 0.5 0.3 0.3
63 0.8 0.4 0.2 0.2
80 0.6 0.3 0.2 0.2
100 0.5 0.2 0.1 0.1
125 0.4 0.2 0.1 0.1