ABB VD4 Installation And Service Instructions Manual page 18

The circuit-breaker is completed with the isolating contacts (8).
The withdrawable circuit-breaker is fitted with special locks on the
front crosspiece, which allow hooking up into the corresponding
couplings of the switchgear. The locks can only be activated by the
handles with the truck fully resting against the crosspiece.
The operating lever (16) must be fully inserted (also see par. 7.5.). A
lock prevents the truck from advancing into the enclosure or fixed
part when the earthing switch is closed.
1
2
3
Caption
1 Lever for manually charging the closing spring
2 Signalling device for circuit-breaker open/closed
3 Rating plate
4 Opening pushbutton
5 Closing pushbutton
6 Signalling device for closing spring charged/discharged
7 Operation counter
8 Isolating contacts
Fig. 5a
13
2
3
1
10
Caption
1 Coupling for the manual closing spring charging lever
2 Signalling device for circuit-breaker open/closed
3 Rating plate
4 Opening pushbutton
5 Closing pushbutton
6 Signalling device for closing spring charged/discharged
7 Operation counter
8 Isolating contacts
Fig. 5b
16
Another lock prevents racking-in and racking-out with the circuit-
breaker closed. With the truck in an intermediate position between
isolated and connected, a further lock prevents circuit-breaker closing
(either mechanical or electrical).
A locking magnet is also mounted on the truck which, when de-
energised, prevents the truck racking-in operation.
On request, an interlock is available which prevents racking-in of the
circuit-breaker with the door open, and door opening with the circuit-
breaker closed.
13
14
15
4
5
6
12
7
9
8
17
10
9 Slide for operating the switchgear shutters
10 Truck
11 Locks for hooking into the fixed part
12 Mechanical override of the undervoltage release (on request)
13 Strikers for activating the contacts placed in the enclosure
14 Connector (plug)
15 Cabling connection
16 Operating lever for circuit-breaker racking-in/out
17 Handles for activating the locks (11).
8
4
5
6
7
9
17
9 Slide for operating the switchgear shutters
10 Truck
11 Locks for hooking into the fixed part
13 Connector (plug)
16 Operating lever for circuit-breaker racking-in/out (a special version is provided
17 Handles for activating the locks (11).
(*) Only VD4/ZS8 Preussen - Elektra EON version.
for VD4/ZS8 Preussen Elektra EON circuit-breakers)
16
11
13
16
11