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D-14
Electrical diagrams
Electrical interlocking with lockout after a fault and emergency off by shunt release
DB401817
ATTENTION
(1)
Not to be wired on fixed version.
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
KA3
time delay for genset startup order to avoid starting
the genset for transient UN disturbances
QN
“Normal” source Masterpact NT or NW
QR
“Replacement” source Masterpact NT or 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
MX2
shunt release
BP
emergency off button with latching
ON
“Normal” source opening order
OR
“Replacement” source opening order
FN
“Normal” source closing order (0.25 second delay)
FR
“Replacement” source closing order (0.25 second delay)
BP
emergency off button with latching
States permitted by mechanical interlocking system
Normal
Replacement
0
0
1
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...).
2 Masterpact NT or NW devices
Diagram no. 51201140