Installation guide

C-26
Electrical diagrams
2 Normal sources and 1 Replacement source: automatic-control system for generator set without lockout
after a fault (with MN)
DB101737
Legends
QN... “Normal”
source Masterpact NW
QR “Replacement” source Masterpact NW
MCH spring-charging
motor
XF standard closing voltage release
MN
undervoltage 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
F2/F3 circuit
breaker (high breaking capacity)
S1 control switches
S2 source
selection switches
KA1 auxiliary
relay
KA2 auxiliary
relays with 10 to 180 sec. time delay
KA3 auxiliary
relays with 0.1 to 30 sec. time delay
KA4 auxiliary
relay
KA5 auxiliary
relays with 0.25 sec. time delay
KA6 auxiliary
relays with 0.25 sec. time delay
States permitted by mechanical interlocking system
and with associated automatism
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. 51156908
Livre 1.indb 26 08/10/2008 18:40:01