Ormazabal cpg.0 - Page 72

IG-123-EN version 11; 23/07/2021
72
Operations sequence General instructions
cpg.0: GIS medium-voltage switchgear,
gas insulated, up to 40.5 kV,
in accordance with IEC Standard
Recommended fuses
The fuses recommended for use in cpg.0-f and cpg.0-
 cubicles are dened according to tests carried out
by the manufacturers. The following table shows the
recommended fuse ratings according to the U
n
/P
trafo
ratio:
U
n
(Network)
(kV)
U
n
(Cubicle)
(kV)
Transformer power (kVA)
100 125 160 200 250 315 400 500 630 800 1000 1250
10
24 16 25 25 40 40 40 63 63 100 100 125 160
13.8
24 10 16 16 25 25 40 40 63 63 100 100 125
15
24 10 16 16 25 25 40 40 40 63 63 100 100
20
24 10 16 16 25 25 25 40 40 63 63 63 100
25
36 10 10 16 25 25 25 40 40 40 40 40 63
30
36 10 10 16 16 25 25 40 40 40 40 40 63
General operating conditions: Overload < 20% and Temperature < 40ºC.
Shaded areas: Overload < 30% and Temperature < 50ºC Maximum fuse losses admitted: < 75 W (55 W for U = 10 kV).
Table 7.1. Recommended fuse calibres
Transfer currents according to IEC 62271-105
The transfer currents have been tested in accordance with
the following parameters:
U
n
Fuse
(kV)
U
n
Cubicle
(kV)
I
n
Fuse
(A)
I
Transfer
(A)
Up to 36 Up to 36 40 820
Table 7.2. Transfer current