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D-30
Electrical diagrams
2 sources and 1 coupling: electrical interlocking with lockout after a fault
DB101747
ATTENTION
The diagram shows the electrical wiring for circuit breakers.
When wiring the SDE with
switch-disconnectors, connect
the SDE to terminals 81 and 84.
Legends
QS...
“Source” Masterpact NW
QC
“Coupling” Masterpact NW
MCH
spring-charging motor
MX
standard opening voltage release
XF
standard closing voltage release
OF...
breaker ON/OFF indication contact
SDE1
“fault-trip” indication contact
PF
“ready-to-close” contact
CE...
“connected-position” indication contact (carriage switch)
CH
“springs charged” indication contact
F1
auxiliary power supply circuit breaker
t1
coupling order for “Source 1 failure”
(QC closing time delay = 0.25 sec. minimum)
t2
coupling order for “Source 2 failure”
(QC closing time delay = 0.25 sec. minimum)
t3
coupling order for “Source 1 restored”
(QS1 closing time delay = 0.25 sec. minimum)
t4
coupling order for “Source 2 restored “
(QS2 closing time delay = 0.25 sec. minimum)
KA1
auxiliary relays
KA2
auxiliary relays
KA3
auxiliary relays
States permitted by mechanical interlocking system
Source 1 Source 2 Coupling
0
0
0
1
1
0
1
0
1
0
1
1
1
0
0
0
1
0
0
0
1
Note:
diagram shown with circuit breakers in connected position, open,
charged, and ready to close.
Auxiliary power supply = supply voltage of auxiliary relays (KA...)
= supply voltage of electrical auxiliaries (electrical operation,
MCH, MX, MN...).
3 Masterpact NW devices
Diagram no. 51156913