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D-3
Electrical diagrams
Source-changeover system without automatic-control system
With emergency off by MN release and automatic reset
DB401806
Automatic reset
(1)
Prefabricated wiring supplied.
(2)
Independent auxiliary source.
Legends
QN
“Normal” source Compact NSX equipped with
motormechanism
QR
“Replacement” source Compact NSX equipped with motor
mechanism
MN
undervoltage release
OF2
breaker ON/OFF indication contact
SDE
“fault-trip” indication contact
MT
motor mechanism
IVE
electrical interlocking and terminal block unit
BP
emergency off button with latching
KA3
auxiliary relay
F1
auxiliary power supply circuit breaker
States permitted by mechanical interlocking system
Normal
Replacement
0
0
1
0
0
1
Note:
after a fault trip, the breaker must be reset manually by pressing
its reset button.
Diagram shown with circuits de-energised, circuit breakers open
and relays in normal position.
Remote-operated
source-changeover systems
2 Compact NSX100/630 devices
Diagram no. 51201178