ABB REG316 4 Series Operating Instructions Manual page 275

REG 316*4 1MRB520049-Uen / Rev. F
Design example:
U = 8 kV
Gen
£
Assumed: I
Emax
Determination of the grounding resistors:
+
Condition 1: R
Es
³
Condition 2: R
Ps
Assumed: R
Ps
³
Condition 3: R
Es
³
Condition 4: R
Es
In order to fulfil conditions 1, 3 and 4: R
Determination of the v.t.:
N
12
Assumed: =
N
3
11
Condition 5 is fulfilled because:
N
12
´ ³
1.2 n
N
11
8 kV
=
n
´
3 100
The following values are permissible:
W
R = 150
Ps
W
R = 800
Es
=
N N 8 kV
12 11
Design instructions:
When supplied from a 110 V battery, the maximum power in-
jected into the stator circuit is 110 VA. The injection unit is
equipped with a converter to accommodate battery voltages
between 48 V and 250 V. The peak injection voltage is ±96 V.
5 A
8 kV
³ ³
R 924
Ps
´
3 5 A
W
130
W
= 150
´ W = W
4.5 150 675
W
700
8 kV
= 46 188
.
´
100 V
³ ´ ³
0.8 n = 46.7 31.1
800 Ω
´ =
+
800 Ω 150 Ω
V
3 100 V
ABB Switzerland Ltd
W
W
= 800
Es
where
38.9
3-237