Siemens 7SJ82 Manual page 987

2b) Internal Structure of a Can
The internal structure of a can must be known or must be determined. This information can be requested
from the manufacturer of the capacitor bank.
This example assumes the following internal structure of the can:
- 14 parallel capacitances
- Internal fuses (one internal fuse per capacitance)
- 7 capacitance levels in series
[dwintauka-120314-01, 2, en_US]
Figure 7-12
2c) Capacitance of a Can
The capacitance of a can must be known or must be determined. This information can be requested from the
manufacturer of the capacitor bank.
•
Capacitance per can: C
2d) Current per Phase
The unbalanced current is derived under the assumption of a certain phase current.
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017
Internal Structure of a Can
= 19.67 μF
K
7.4 Current-Unbalance Protection for Capacitors, 3-Phase
Capacitor Bank Protection
987