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6. Instructions for operating the circuit-
breaker
6.1.
Safety indications
The VD4 circuit-breakers guarantee a minimum
IP2X degree of protection when installed in the
following conditions:
– fixed circuit-breaker, installed behind a protective
metal net
– withdrawable circuit-breaker, installed in
switchgear.
Under these conditions the operator is totally
guaranteed against accidental contact with moving
parts.
1
2
3
Caption
1 Key lock (if provided) (*)
2 Lever for manually charging the closing spring
3 Coupling lever for racking-out operation (only VD4/ZS2 version)
4 Opening pushbutton
5 Closing pushbutton
6 Signalling device for circuit-breaker open/closed
7 Signalling device for closing springs charged/discharged
8 Operation counter.
9 Handles for operating the truck locks (only for withdrawable circuit-breakers)
10 Operating lever for circuit-breaker racking-in/out (there is a special version for VD4/ZS2)
11 Mechanical undervoltage release override (on request).
(*) Warning! To activate the key lock: open the circuit-breaker, keep the opening pushbutton depressed, then turn the key and remove it from the housing.
Fig. 6
Should mechanical operations be carried out on the
circuit-breaker outside of the switchgear, take great
care of the moving parts.
If the operations are prevented, do not force the
mechanical interlocks and check that the operating
sequence is correct.
Racking the circuit-breaker in and out of the
switchgear must be done gradually to avoid shocks
which may deform the mechanical interlocks.
6.2.
Switching and signalling parts
VD4 circuit-breakers for UniGear switchgear and
PowerCube modules (fig. 6)
4
5
6
11
7
8
9
Mechanical override of the
undervoltage release
(on request)
Undervoltage release ena -
bled. The circuit-breaker
can only be closed i f the
undervoltage release is sup -
plied with power.
Undervoltage release disa-
bled. The circuit-breaker
can also be closed i f the
undervoltage release is not
supplied with power.
10
14
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