How To Calculate The Power Of Capacitors - Alpes Technologies Page 3
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3How to calculate the power of capacitors
(continued)
rEaCTivE COmPENSaTiON Of TraNSfOrmErS
KVAr power to be provided for the internal
When defining a reactive energy compensation
Nominal
consumption of the transformer
installation, it is advisable to provide a fixed
power of the
capacitor corresponding to the internal reactive
Operation
transformer
consumption of the transformer at 75% load.
kVA
off-load
75% load
100% load
100
3
5
6
In order to operate correctly, a transformer requires
160
4
7.5
10
internal reactive energy to magnetise its windings.
200
4
9
12
250
5
11
15
The table opposite gives, for information purposes
315
6
15
20
only, the value of the fixed capacitor bank to be
400
8
20
25
installed according to the powers and loads of the
500
25
10
30
transformer. These values may change, depending on
630
12
30
40
the technology of the device. Each manufacturer can
800
20
40
55
1000
50
25
70
provide their own precise values.
1250
30
70
90
2000
50
100
150
2500
150
60
200
3150
90
200
250
4000
160
250
320
5000
200
300
425
14
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