46
Caption
= Reference number of diagram figure.
*
= See note indicated by the letter.
-qb
= Circuit-breaker accessories.
-bM
= Device for the supervision of shunt opening release
and shunt closing release coil continuity (see note D).
-MS
= Motor for the closing springs charging (see note C).
-bb1..2-3 = Circuit-breaker auxiliary contacts.
-bS1 = Limit switches of the spring-charging motor.
-bS2 = Limit switches signalling closing spring charged or
discharged.
-bD
= Position contact of the enclosure door.
-bT1
= Contacts signalling circuit-breaker in the
connected position (see note E).
-bT2
= Contacts signalling circuit-breaker in the removed
position (see note E).
-bT3
= Circuit-breaker position contact. It is open during
the travel of the breaker (see note H).
-SC
= Pushbutton or contact for the circuit-breaker
closing.
-SO
= Pushbutton or contact for the circuit-breaker
opening.
-Xb
= Connector for the circuit-breaker circuits.
-Xb2..9 = Connectors of accessories.
-Xb1
= Switchboard terminal board (mounted externally to
the circuit-breaker).
-RL1
= Locking magnet. If de-energized it prevents the
circuit-breaker closing mechanically ( it is possible
to limit it consumption by connecting in series a
delaying pushbutton enabling the operation).
-RL2
= Locking magnet. If de-energized it prevents
the circuit-breaker racking-in and racking-out
mechanically (it is possible to limit its consumption
by connecting in series a delaying pushbutton
enabling the operation).
-MC
= Shunt closing release (see note D).
-MO1 = First shunt opening release (see note D).
-MO2 = Second shunt opening release (see note D)
-MO3
= Opening solenoid for release external to the circuit-
breaker.
-Mu
= undervoltage release (see note b).
