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D-32
Electrical diagrams
Source-changeover system with BA controller
Coupling
DB101751
DB101753
Transfer conditions
DB101755
Terminals 20 and 21:
additional control contact (not part of
controller).
Tests on “Normal” and “Replacement”
source voltages
The single-phase check for UN and UR
is implemented across terminals 1 and 5
of circuit breakers Q1 and Q2.
Legends
Q1
circuit breaker supplying and protecting the automatic-
control circuits for the “Normal” source
Q2
circuit breaker supplying and protecting the automatic-
control circuits for the “Replacement” source
ACP
control plate
BA
automatic controller
IVE
electrical interlocking and terminal block unit
Note:
diagram shown with circuits de-energised, circuit breakers open
and relays in normal position.
Source-changeover systems
with automatic controllers
2 Compact NSX100/630, NS630b/1600
or Masterpact NT/NW devices