Installation guide

C-24
Electrical diagrams
2 Normal sources and 1 Replacement source: electrical interlocking without lockout after a fault
DB101734
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
PF “ready-to-close” contact
CE
“connected-position” indication contact (carriage switch)
CH
“springs charged” indication contact
F1 auxiliary
power supply circuit breaker
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. minimum)
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. 51156906
Livre 1.indb 24 08/10/2008 18:39:59