ABB SafeRing User Manual

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 LV 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.

ABB SafeRing Specifications

General

Rated voltage	Up to 24 kV
Insulation type	SF6 gas
Application	Secondary distribution networks
Frequency	50 Hz, 60 Hz
Operating temperature range	-25°C to +40°C
Dimensions	Varies
Enclosure	Metal enclosure
Protection degree	IP67