HHD
Applications
Protection of Transformers Type B
Recommendation for the protection of transformer mains with HHD fuse and using SIBA LV NH fuses* operating class gG/gL on the low voltage side.
HV Fuse Selection Guide
System Voltage( Line - Line) [kV]
6 - 7.2
10 - 12
20 - 24
30 - 36
Transformer
Secondary Fusing with NH - gG/gL
Rating
Rated Current of Fuse
50 [kVA]
[A]
[A]
[A]
10 [A]
[A]
16
-
6.3
6.3 - 10 4 - 6.3
63
80 63 50 40 20 25 10
16
10
630 500 315 400 250 200 125 160 800
- 20
800 630 400 500 315 250 125 160 100 200
- 31.5
- - 10 10 -
16
- - - -
40 50
20 - 25 20
31.5
- 16
20 20 25 25
10
20 20 80 16 16
- 31.5
16
63
25 -
25 50 50 40
-
80
- -
16
50 50 40 25 25 20
31.5
- - -
- 100
40 - 31.5 25 - 20 - 20 - -
50 63 40
40 - - 63 63 - 80 31.5 - 50 40
160 125 100
-
- 80
31.5
100 -
125
-
125
125 80 100
-
- 125
160
1 250 1 000
-
160
40
-
63
200
160
-
1 000 1 600 2 000 1 250
50
250
100 80 125
160 200 250
63 2x40
2X200 2X160
*Use of the recommended HV fuses in connection with LV fuse of other manufacturers must be checked before installation.
portal: www.siballc.net e-mail: info@sibafuse.com
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