Siemens siprotec 7SA6 - Page 140

Configuration
5-16 7SA6 Manual
C53000-G1176-C133-1
Figure 5-9 Double command with double contacts (with 4 relays)
Figure 5-10 Double command with double and single contacts (with 3 relays)
For the motor control illustrated in Figure 5-11 the following can be realized:
− via CLOSE command anti-clockwise rotation
− via TRIP command clockwise rotation
− and in quiescient state TRIP
The power relays with 2 NO contacts (each) to be used for this purpose are interlocked
against eachother so that only
one relay can be connected.
When using the power relay for a motor controlled three-position disconnector
please observe the following:
For the disconnector and earth switch function the same output relays are controlled
by two different commands. Since both end positions are achieved by different rotation
of the motor, one of the two commands must be negated. Therefore the command
types e. g. &)B' and &)B'1are to be applied in this case.
CLOSE
Command
C+1
C+2
TRIP
Command
C–1
t
CLOSE TRIP
Switching
C+1 C–1
L+
L–
C+2
C–2
C–2
Matrix Configuration:
C+1
X
1
C–1
X
2
34
C+2
X
C–2
X
Device
CLOSE
Command
C+1
C+2
TRIP
Command
C–
t
CLOSE TRIP
Switching
Device
C+1 C–
L+
L–
C+2
Matrix Configuration:
C+1
X
1
C–
X
2
3
X
C+2