Ormazabal cgmcosmos-p User Manual

5.4.1. Selecting recommended fuses
The fuses recommended for use in the fuse protection
functional units are dened according to the tests carried
out. The next
The following table shows the recommended fuse ratings
according to the U
r
/P
transf.
ratio:
U
r
network
[kV]
U
r
cubicle
[kV]
U
r
fuse
[kV]
Rated power of the transformer
WITHOUT OVERLOAD
[kVA]
25 50 75 100 125 160 200 250 315 400 500 630 800 1000 1250 1600 2000
Rated fuse current (A) IEC 60282-1
10 24 6/12 6.3 10 16 16 20 20 25 31.5 40 50 63 63 80 100 160 200 -
13.5 24 10/24 6.3 6.3 10 16 16 20 20 25 31.5 40 50 63 63 80 100 - -
15 24 10/24 6.3 6.3 10 16 16 16 20 20 25 31.5 40 50 63 80 80 - -
20 24 10/24 6.3 6.3 6.3 10 16 16 16 20 20 25 31.5 40 50 50 63 80 125
Table 5.1. Recommended fuse calibres
1. Fuses recommended: SIBA brand with medium type
striker, conforming to IEC 60282-1 (Low loss fuses).
2. The values for combined fuses, in accordance with IEC
62271-105 are greyed.
3. The fuse-switch assembly has been temperature-rise
tested under normal service conditions according to
IEC 62271-1.
4. A fuse-holder carriage adapted for 292 mm 6/12 kV
fuses is available.
5. For ratings not marked in bold the measurement is 442
mm.
6. If any of the fuses blows, we recommend changing all
three.
7. For overload conditions in the transformer or use of
other brands of fuse, please consult Ormazabal.
For the auxiliary services function, the recommended
fuse is "Back up" type 10/24 kV, 442mm, calibre 2 A.
Transfer current according to IEC 62271-105:
U
r
fuse
[kV]
U
r
cubicle
[kV]
I
transfer
[A]
12 12 2300
24 24 1600
Table 5.2. Transfer current
IG-296-EN version 01; 12/03/2020
50
Recommended sequence of operations General instructions
cgmcosmos: Medium voltage cubicles with full insulation
in SF
6
gas up to 24 kV in accordance with IEC Standard

Ormazabal cgmcosmos-p Specifications

General

Brand	Ormazabal
Model	cgmcosmos-p
Category	Control Systems
Language	English