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5.5.9. Standard fittings for withdrawable circuit-breakers for ZS8.4 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 spring charged/discharged
– mechanical signalling device for circuit-breaker open/closed
– closing pushbutton
– opening pushbutton
– operation counter
– set of ten auxiliary circuit-breaker open/closed contacts
Note:
with the set of ten auxiliary contacts supplied as standard and the maximum number of electrical applica-
tions possible, three make contacts (signalling circuit-breaker open) and four break contacts (signalling circuit-
breaker closed) are available.
– lever for manually charging the closing springs incorporated in the operating mechanism for VD4/Z8 and VD4/
ZT8, external with rotary movement for VD4/ZS8
– 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 apparatus ordered)
5.5.10. VD4/ZS8 (Preussen Elektra-EON version)
– Device for recharging the closing spring, with door closed, by means of removable rotary handle and outside the
operating mechanism and the switchgear
– 64-pin Harting socket with mechanical interlock which prevents traverse of the circuit-breaker when the plug is
not inserted in the socket
– Interlock with the door which prevents insertion of the spring charging lever when the circuit-breaker is closed
– Interlock with the door and the 64-pin Harting socket which prevents door closure when the plug is not inserted
in the socket.
5.5.11. VD4/Z8 - VD4/ZT8
– Harting 64-pin socket with mechanical interlock which prevents traverse of the circuit-breaker when the plug is
not inserted in the socket.
Caption
1) Device for spring charging with rotary handle
2) Harting 64-pin socket with mechanical interlock which prevents traverse when the socket is not inserted
3) Door-socket-spring charging device interlock (only VD4/ZS8 version)
