ABB REG316 4 Series - Page 167

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-129
Example 3
U
GN
= 12 kV; I
C
= 10 A; grounding transformer specified accord-
ing to the rated voltage of the generator.
U
1n
= U
GN
= 12 kV
U
2n
= 230 V
I
1n
= I
Emax
= I
C
= 10 A
I
2n
= I
e
= I
Emax
U
U
A
n
n
1
2
10
12000
230
522==
R
e
=
´
æ
è
ç
ö
ø
÷
=
12000
310
230
12000
0 254
2
. W
S
n
= 12000 ´ 10 ³ 120 kVA
Specification:
1 grounding transformer 120 kVA; 10 s; 50 Hz
12000/230 V; 10/522 A
1 resistor 0.254
W; 522 A; 10 s
1 interposing v.t. 10 VA; 50 Hz; 230/100 V