32
15.6.2 FUSE SELECTION TABLE - CEF-S
Transformer rated
voltage (kV)
Transformer rating (kVA)
Fuse-link rated
voltage (kV)
Fuse-link length
„e“ (mm)
25
50
75
100 125 160 200 250 315 400 500 630
Catalogue No. CEF-S
Catalogue No.
CEF-S-TCU
Fuse-link rating In (A)
3
16
25
40
50
6/12
292
3.3
16
25
40
50
50
4.15
16
20
40
40
50
10A:1YMB531011M0001
10A:1YMB531861M0001
5
10
20
25
40
40
50
16A:1YMB531011M0002
16A:1YMB531861M0002
5.5
10
20
20
40
40
40
50
20A:1YMB531011M0003
20A:1YMB531861M0003
6
10
16
20
25
40
40
50
25A:1YMB531011M0004
25A:1YMB531861M0004
6.6 10*
16
20
25
40
40
50
50
40A:1YMB531011M0005
40A:1YMB531861M0005
10 10*
10
16
20
20
25
40
40
50
50A:1YMB531011M0006
50A:1YMB531861M0006
11 10*
10
16
20
20
25
40
40
40
50
12 10*
10
16
16
20
20
25
40
40
50
13.8 10*
10*
16
16
16
20
20
40
40
40
10/24
442
15 10*
10*
10
16
16
20
20
25
40
40
10A:1YMB531012M0001
10A:1YMB531862M0001
17.5 10*
10*
10
16
16
20
20
20
40
40
40
16A:1YMB531012M0002
16A:1YMB531862M0002
20 10*
10*
10*
10
16
16
20
20
25
40
40
20A:1YMB531012M0003
20A:1YMB531862M0003
22 10*
10*
10*
10
16
16
20
20
20
40
40
40
25A:1YMB531012M0004
25A:1YMB531862M0004
24 10*
10*
10*
10
16
16
16
20
20
25
40
40
40A:1YMB531012M0005
40A:1YMB531862M0005
Max.gG fuse-link
at L
V side (A)
40
80
125 160 160 200 250 250 300 400 400 800
The table was calculated according to standards IEC 60787
and IEC 62271-105. The following transformer and switch-
gear work conditions were assumed:
– Maximum long-lasting transformer overload - 120%
– Magnetizing inrush current for transformers up to and
including 630kVA - 12 x In during 100ms
– Magnetizing inrush current for transformers above
630kVA - 10 x In during 100ms
– Standard ambient working conditions for SafeRing /
SafePlus
switchgear
(most important: ambient temperature -25 ºC to +40 ºC),
For ratings marked with “*” transformer maximum short-circuit
current at LV side, transferred to HV side, is below fuse-link
minimum breaking current I3.
The table above details the rated current of a particular fuse-
link for a given line voltage and transformer rating. For differ-
ent criteria, the fuse selection must be recalculated.
