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5.4.6. Standard fittings for withdrawable circuit-breakers for UniSafe switchgear
The basic versions of the withdrawable circuit-breakers are always three-pole and fitted with:
– EL type manual operating mechanism
– mechanical signalling device for closing springs charged/discharged
– mechanical signalling device for circuit-breaker open/closed
– closing pushbutton
– opening pushbutton
– operation counter
– set of ten circuit-breaker open/closed auxiliary contacts.
Note
With the group of ten auxiliary contacts, as standard, and the maximum of the requested applications, the
following are available: three opening contacts (signalling circuit-breaker open) and five closing contacts
(signalling circuit-breaker closed).
– lever for manually charging the closing springs
– isolating contacts
– cord with connector (only plug) for auxiliary circuits, with striker pin which does not allow
connection of the plug in the socket if the rated current of the circuit-breaker is different from
the rated current of the panel
– racking-in/out lever (the quantity must be defined according to the number of pieces of appara-
tus ordered)
– locking electromagnet in the truck. It prevents racking-in of the circuit-breaker in the panel with
auxiliary circuits not connected (plug not inserted in the socket).
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