Specifications

90
Electrical diagrams
Remote-operated
source-changeover systems 0
3 Masterpact NW devices
Diagram no. 51156914
2 sources and 1 coupling: automatic-control system with lockout after a fault
DB101749
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
F2/F3 circuit breaker (high breaking capacity)
S1 control switches
S2 source selection switches
KA1 auxiliary relays with 10 to 180 sec. time delay
KA2 auxiliary relays with 0.1 to 30 sec. time delay
KA3 auxiliary relays with 10 to 180 sec. time delay
KA4 auxiliary relays with 0.1 to 30 sec. time delay
KA5 auxiliary relays with 0.25 sec. time delay
KA6 auxiliary relays with 0.25 sec. time delay
KA7 auxiliary relays with 0.25 sec. time delay
States permitted by mechanical interlocking system
and with associated automatism
Source 1 Source 2 Coupling
000
110
101
011
100
010
001
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...).