Siemens siprotec 7SA6 User Manual page 140

Configuration
CLOSE
Command
C+1
C+2
C–1
C–2
Matrix Configuration:
Figure 5-9 Double command with double contacts (with 4 relays)
CLOSE
Command
C+1
C+2
C–
Matrix Configuration:
Figure 5-10 Double command with double and single contacts (with 3 relays)
5-16
TRIP
Command
1 2
3 4
X X X X
TRIP
Command
1 2 3
X X X
For the motor control illustrated in Figure 5-11 the following can be realized:
− via CLOSE command
− via TRIP command
− and in quiescient state
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.
C+1
CLOSE
C+2
t
C+1
CLOSE
C+2
t
anti-clockwise rotation
clockwise rotation
TRIP
L+
C–1
Switching
TRIP
Device
C–2
L–
L+
C–
Switching
TRIP
Device
L–
7SA6 Manual
C53000-G1176-C133-1