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D-15
Electrical diagrams
Electrical interlocking with lockout after a fault and emergency off by undervoltage release
DB401819
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
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
MN
undervoltage 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
BP
emergency off button with latching
S1
control switches
KA3
auxiliary relay
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)
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...).
Remote-operated
source-changeover systems
0
2 Masterpact NT or NW devices
Diagram no. 51201141