Circuit-Breaker Closing And Opening Operations; Electrical Spring Charging Operation; Vd4 Circuit-Breakers For Zs8.4 Switchgear - ABB VD4 Installation And Service Instructions Manual

6.3.

Circuit-breaker closing and opening operations

Circuit-breaker operation can be either manual or electrical (fig. 6 -
fig. 7).
a1) Manual closing spring charging for VD4 circuit-breakers for
UniGear switchgear and PowerCube modules (fig. 7a)
Repeatedly activate the charging lever (2) (maximum rotation angle of
the lever: about 90°) until the yellow indicator (7) appears.
The maximum forces which can normally be applied to the lever are
<150 N for the EL1operating mechanism, <200 N for the EL2 operating
mechanism and <250 N for EL3 operating mechanism.
VD4 circuit-breakers for ZS8.4 switchgear (fig. 6b)
10
2a
Fig. 6b
1
2
1
Caption
1 Key lock (if provided)
2 Lever for manually charging the closing spring
2a Coupling for manual closing spring charging (when lever 2 is not provided)
3 Coupling for racking-out operation lever (only for withdrawable circuit-breakers)
4 Opening pushbutton
5 Closing pushbutton
6 Signalling device for circuit-breaker open/closed
7 Signalling device for closing spring 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.
a2) Manual closing spring charging for VD4/ZS8 circuit-breakers
(fig. 7b)
Rotate the charging lever (2) (rotate about 12 times) until the yellow
indicator (7) appears. The maximum force which can normally be
applied to the lever is <150 N for the EL1 operating mechanism.
The operation can be carried out with the door open, with the door
closed, with the circuit-breaker racked-out and with the circuit-breaker
racked-in.
b)

Electrical spring charging operation

On request, the circuit-breaker can be fitted with the following
accessories for electrical operation:
– geared motor for automatic closing spring charging
– shunt closing release
– shunt opening release.
9 3 6
2
4
5
7
8
37