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D-19
Electrical diagrams
Automatic-control system without IVE unit for permanent replacement source with lockout after a fault
DB401823
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
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
F2/F3
circuit breaker (high breaking capacity)
S1
control switches
KA1
auxiliary relays - UN presence detection
KA2
auxiliary relays - UR presence detection
KM1
contactors with 0.25 second delay (for transfer to
“Replacement” source)
KM2
contactors with 0.25 second delay (for transfer to “Normal”
source)
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
2 Masterpact NT or NW devices
Diagram no. 51156226