Instructions For Operating The Circuit-Breaker; Safety Indications; Switching And Signalling Parts - ABB VD4 Installation And Service Instructions Manual

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.
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. 6a)
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/ZS8 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/ZS8)
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. 6a
36
4
5
6
11
8
9
7
Mechanical override of the
undervoltage release
(on request)
Undervoltage release ena-
bled. The circuit-breaker
can only be closed if the
undervoltage release is
supplied with power.
Undervoltage release disa-
bled. The circuit-breaker
can also be closed if the
undervoltage release is not
supplied with power.
10