Installation guide

C-31
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...).
Remote-operated
source-changeover systems
3 Masterpact NW devices
Diagram no. 51156913
Livre 1.indb 31 08/10/2008 18:40:08