Installation guide

C-25
Electrical diagrams
2 Normal sources and 1 Replacement source: electrical interlocking with lockout after a fault
DB101766
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
QN... “Normal” source Masterpact NW
QR
“Replacement” source 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
CE1 “connected-position”
indication contact (carriage switch)
CH “springs charged” indication contact
F1
auxiliary power supply circuit breaker
S1
control switches
S2 source
selection switches
t1 order for transfer from “R” to “N1 + N2”
(QN1
and QN2 closing time delay = 0.25 sec. minimum)
t2 order for transfer from “N1 + N2”to “R”
(QR
closing time delay = 0.25 sec. minimumm)
States permitted by mechanical interlocking system
Normal 1 Normal 2 Replacement
0 0 0
1 1 0
0 0 1
1 0 0
0 1 0
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. 51156907
Livre 1.indb 25 08/10/2008 18:40:00