Description
38/121 Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DJH • 500-8067.9
Transformer protection table
The following table shows the recommended HV HRC fuse-links make SIBA and Mersen for the
fuse protection of transformers.
The electrical values are valid for ambient air temperatures of up to 40 °C.
NOTE
• For switchgear with a rated voltage of up to 12 kV, observe the design of the fuse slide
supplied (reference dimension e=292 mm, optionally e=442 mm)
• Impermissible fuse-links:
- 7.2 kV fuse-links with reference dimension 192 mm
- 24 kV fuse-links with reference dimension 292 mm
System operating
voltage
Transformer HV HRC fuse-link Order number for HV HRC fuse-link
U
n
[kV] S
r
[kVA] u
K
[%] I
r
[A] I
r
[A] U
r
[kV] e [mm] Make SIBA Make Mersen
3.3…3.6 20 4 3.5 6.3 3…7.2 292 30 098 13.6,3 –
10 3…7.2 292 30 098 13.10 –
30 4 5.25 10 3…7.2 292 30 098 13.10 –
16 3…7.2 292 30 098 13.16 –
50 4 8.75 16 3…7.2 292 30 098 13.16 –
20 3…7.2 292 30 098 13.20 –
75 4 13.1 20 3…7.2 292 30 098 13.20 –
25 3…7.2 292 30 098 13.25 –
100 4 17.5 31.5 3…7.2 292 30 098 13.31,5 –
40 3…7.2 292 30 098 13.40 –
125 4 21.87 31.5 3…7.2 292 30 098 13.31,5 –
40 3…7.2 292 30 098 13.40 –
160 4 28 40 3…7.2 292 30 098 13.40 –
50 3…7.2 292 30 098 13.50 –
200 4 35 50 3…7.2 292 30 098 13.50 –
63 3…7.2 292 30 099 13.63 –
250 4 43.74 63 3…7.2 292 30 099 13.63 –
80 3…7.2 292 30 099 13.80 –
4.16…4.8 20 4 2.78 6.3 3…7.2 292 30 098 13.6,3 –
30 4 4.16 10 3…7.2 292 30 098 13.10 –
50 4 6.93 16 3…7.2 292 30 098 13.16 –
75 4 10.4 16 3…7.2 292 30 098 13.16 –
20 3…7.2 292 30 098 13.20 –
100 4 13.87 20 3…7.2 292 30 098 13.20 –
25 3…7.2 292 30 098 13.25 –
125 4 17.35 25 3…7.2 292 30 098 13.25 –
31.5 3…7.2 292 30 098 13.31,5 –
160 4 22.2 31.5 3…7.2 292 30 098 13.31,5 –
40 3…7.2 292 30 098 13.40 –
200 4 27.75 40 3…7.2 292 30 098 13.40 –
50 3…7.2 292 30 098 13.50 –
250 4 34.7 50 3…7.2 292 30 098 13.50 –
63 3…7.2 292 30 099 13.63 –
315 4 43.7 63 3…7.2 292 30 099 13.63 –
80 3…7.2 292 30 099 13.80 –
5.0…5.5 20 4 2.3 6.3 3…7.2 292 30 098 13.6,3 –
30 4 3.4 6.3 3…7.2 292 30 098 13.6,3 –
10 3…7.2 292 30 098 13.10 –
50 4 5.7 10 3…7.2 292 30 098 13.10 –
16 3…7.2 292 30 098 13.16 –
75 4 8.6 16 3…7.2 292 30 098 13.16 –
20 3…7.2 292 30 098 13.20 –
100 4 11.5 16 3…7.2 292 30 098 13.16 –
20 3…7.2 292 30 098 13.20 –
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