Technical data | 4
39/174
500-8384.9 • Version 11 • Installation and Operating Instructions • 8DJH
Allocation of HV HRC fuses and transformers
The three-position switch-disconnector in the transformer feeder (transformer switch) was
combined with HV HRC fuse-links and tested in accordance with IEC 62271-105.
The following protection table shows HV HRC fuse-links tested by Siemens, which are
recommended for transformer protection.
The
fuse protection tables
are valid for:
▪ Maximum ambient air temperature in the switchgear room of 40 °C according to
IEC 62271-1/VDE 0670-1000 considering the influence of the switchgear enclosure. The 24-
hour mean value is max. 35 °C (according to IEC 62271-1/VDE 0671-1)
▪ Requirements according to IEC 62271-105
▪ Protection of distribution transformers according to IEC 60787/VDE 0670-402
▪ Rated power of transformer (no overload operation)
The specified HV HRC fuse-links make SIBA are type-tested back-up fuses according to
IEC 60282-1. The dimensions conform to DIN 43625.
The HV HRC fuse-links have a thermal protection in form of a temperature-limiting striker
tripping operating in case of defective HV HRC fuse-links or high overload currents.
Please contact the Siemens Service Hotline if you want to use HV HRC fuse-links from other
manufacturers.
The selection of HV HRC fuse-links is based on:
▪ IEC 60282‑1
▪ IEC 62271‑105/VDE 0671‑105
▪ IEC 60787/VDE 0670‑402
▪ Recommendations and data sheets of fuse manufacturers
▪ Permissible power loss in the switchgear enclosure at an ambient air temperature of 40º C
NOTICE
HV HRC fuse-links with incorrect characteristic
Using HV HRC fuse-links with different characteristics for nominally equal rated normal
current can damage the switchgear.
⇨ Use specified HV HRC fuse-links from the protection table.
The following table shows HV HRC fuse-links of the makes SIBA and Mersen tested by Siemens,
which are recommended for transformer protection.
Tab. 35:
Transformer protection table
Transformer
HV HRC fuse-link
S
r
[kVA]
u
K
[%]
I
r
[A]
I
r
[A]
U
r
[kV]
e [mm]
Order number
Make SIBA
Make Mersen
System operating voltage U
n
3.3…3.6 kV
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
–
Summary of Contents for 8DJH
Page 173: ......
