Page 216 - B_ELSB_Cat_2022_01_MCBs

1/216 ELECTRICAL INSTALL ATION SOLUTIONS FOR BUILDINGS - TECHNICAL DETAILS 9AKK 107991 A8329
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MCBs technical details
Particular supply sources and loads

Single-phase transformer (primary voltage 230 V)-1P and 1P+N MCBs
P [kVA] I [A] u (%) Circuit-breaker on primary
n n cc
side (1) and (2)
0.1 0.4 13 S 2* D1 o K1
0.16 0.7 10.5 S 2* D2 o K2
0.25 1.1 9.5 S 2* D3 o K3
0.4 1.7 7.5 S 2* D4 o K4
0.63 2.7 7 S 2* D6 o K6
1 4.2 5.2 S 2* D10 o K10
1.6 6.8 4 S 2* D16 o K16
2 8.4 2.9 S 2* D16 o K16
2.5 10.5 3 S 2* D20 o K20
4 16.9 2.1 S 2* D40 o K40
5 21.1 4.5 S 2* D50 o K50
6.3 27 4.5 S 2* D63 o K63

Single-phase transformer (primary voltage 400 V)-2P MCBs
P [kVA] I [A] u (%) Circuit-breaker on primary
n n cc
side (1) and (2)
1 2.44 8 S 2* D6 o K6
1.6 3.9 8 S 2* D10 o K10
2.5 6.1 3 S 2* D16 o K16
4 9.8 2.1 S 2* D20 o K20
5 12.2 4.5 S 2* D32 o K32
6.3 15.4 4.5 S 2* D40 o K40
8 19.5 5 S 2* D50 o K50
10 24 5 S 2* D63 o K63
12.5 30 5 S 2* D63 o K63

Three-phase transformer (primary voltage 400 V)-3P, 3P+N and 4P MCBs
P [kVA] I [A] u (%) Circuit-breaker on primary
n n cc
side (1) and (2)
5 7 4.5 S 2* D20 o K20
6.3 8.8 4.5 S 2* D20 o K20
8 11.6 4.5 S 2* D32 o K32
10 14 5.5 S 2* D32 o K32
12.5 17.6 5.5 S 2* D40 o K40
16 23 5.5 S 2* D63 o K63
20 28 5.5 S 2* D63 o K63
S 2*.. = S 200, S 200 M, S 200 P
(1) With modular or magnetic only circuit-breakers, without thermal adjustment, thermal protection is required for the transformer’s secondary winding.
(2) Breaking capacity selected according to estimated Icc at the point where the breaker is installed.