Controlled Switching — Buyer´s Guide
D-4
Edition 2, 2006-09
Application
Capacitor Banks and Harmonic Filters
Switching of Capacitor Banks and Harmonic Filters
Suitable Switchsync
TM
Controllers
Only closing: Switchsync™ E113
Three-pole Operated and Mechanically Staggered Circuit Breakers
Single-pole Operated Circuit Breakers
Only closing: Switchsync™ F236
Legend:
R,S,T
Three-phase busbar
C
in
Closing command input
O
in
Opening command input
U
ref
Reference voltage input
C
out
Closing command output
O
out
Opening command output
Both closing and opening: Switchsync™ F236
Both closing and opening: Switchsync™ E213
Suitable conditions for combined controlled open-
ing and controlled closing exist for ungrounded
capacitor banks. The need for controlled opening of
grounded capacitor banks is low.
R
S
T
Switchsync
F236
O
in
C
in
O
out
C
out
U
ref
Load:
Shunt Capacitor or
Harmonic Filter
R
S
T
Load:
Shunt Capacitor or
Harmonic Filter
Switchsync
E113
C
in
C
out
U
ref
R
S
T
Switchsync
E213
O
in
C
in
O
out
C
out
Load:
Shunt Capacitor or
Harmonic Filter
U
ref
The purpose of the CT secondary feedback signal is
for adaptation control.
All examples are shown with reference in phase T.
However, any voltage with a known phase shift can
be used as a reference.
R
S
T
Switchsync
F236
C
in
C
out
U
ref
Load:
Shunt Capacitor or
Harmonic Filter
