|
● Capacitor Bank
Protected by Fuses |
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Where external protection of the capacitor
units from long-term overloading
or short-circuiting
is to be provided, a value between 1.43
and 1.8
times rated current should be adopted. The fuses should be of the slow-blowing
type owing to the high momentary current at
make. |
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|
Output Unit/ Equipment (kVAr) |
Rated
Capacitance (µF) |
Rated
Current (Amps) |
Cross
section for 4/C Cu cable (mm2) |
Fuse
Current Slow-blow (Amps) |
|
|
|
10 |
3
x 66.3 |
14.4 |
4 |
25 |
|
|
|
12.5 |
3
x 82.9 |
18.0 |
6 |
35 |
|
|
|
15 |
3
x 99.5 |
21.6 |
6 |
35 |
|
|
|
20 |
3
x 132.6 |
28.8 |
10 |
50 |
|
|
|
25 |
3
x 165.8 |
36.1 |
16 |
63 |
|
|
|
30 |
3
x 198.9 |
43.3 |
25 |
80 |
|
|
|
40 |
3x
265.3 |
57.7 |
35 |
100 |
|
|
|
50 |
3
x 331.6 |
72.1 |
50 |
125 |
|
|
|
60 |
3
x 397.6 |
86.6 |
70 |
160 |
|
|
|
70 |
3
x 464.2 |
101 |
70 |
160 |
|
|
|
90 |
3
x 596.8 |
130 |
120 |
250 |
|
|
|
100 |
3
x 663.1 |
144 |
120 |
250 |
|
|
|
125 |
3
x 828.9 |
180 |
185 |
300 |
|
|
|
150 |
3
x 994.7 |
217 |
240 |
315 |
|
|
|
180 |
3
x 1193.7 |
260 |
240 |
400 |
|
|
|
200 |
3
x 1326.3 |
280 |
240 |
400 |
|
|
|
250 |
3
x 1657.9 |
361 |
240 |
400 |
|
|
|
300 |
3
x 1989.4 |
433 |
400 |
630 |
|
|
|
Connecting
cables should be designed for 1.5 times the rated current
values and upwards. |
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The diameter for cables
and the fuse ratings are minimum values valid for operation under normal
conditions and at an ambient temperature of 300C;
higher values shall be selected if conditions differ from normal (e.g. in
case of harmonics). |
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