MARTINDALE ET4500 - Type B Circuit-Breakers to BS en 60898 and Rcbos to BS en 61009-1

Martindale ET4000 / ET4500 Appendix A – Impedance tables
82
Type B circuit-breakers to BS EN 60898
and RCBO’s to BS EN 61009-1
Disconnection time 0.4 & 5 s
Type C circuit-breakers to BS EN 60898
and RCBO’s to BS EN 61009-1
Disconnection time 0.4 & 5 s
Rated
current
(A)
Z factor
setting
Rated
current
(A)
Z factor
setting
1.0 0.8 1.0 0.8
Max. loop
impedance ()
Max. loop
impedance ()
3
14.57 11.66
6
3.64 2.91
6
7.28 5.82
10
2.19 1.75
10
4.37 3.50
16
1.37 1.10
16
2.73 2.18
20
1.09 0.87
20
2.19 1.75
25
0.87 0.70
25
1.75 1.40
32
0.68 0.54
32
1.37 1.10
40
0.55 0.44
40
1.09 0.87
50
0.44 0.35
50
0.87 0.70
63
0.35 0.28
63
0.69 0.55
80
0.27 0.22
80
0.55 0.44
100
0.22 0.18
100
0.44 0.35
125
0.17 0.14
125
0.35 0.28
Type D circuit-breakers to BS EN 60898
and RCBO’s to BS EN 61009-1
Rated
current
(A)
Z factor setting
1.0 0.8
Disconnection time (s)
0.4 5 0.4 5
Max. loop impedance ()
6
1.82 3.64 1.46 2.91
10
1.09 2.19 0.87 1.75
16
0.68 1.37 0.54 1.10
20
0.55 1.09 0.44 0.87
25
0.44 0.87 0.35 0.70
32
0.34 0.68 0.27 0.54
40
0.27 0.55 0.22 0.44
50
0.22 0.44 0.18 0.35
63
0.17 0.35 0.14 0.28
80
0.14 0.27 0.11 0.22
100
0.11 0.22 0.09 0.18
125
0.09 0.17 0.07 0.14