ABB Vmax - Page 13

11
16
4
5
17
9
1
2
3
6
7
12
10
14
13
15
11
8
8
18
Caption
1 Lever for manually charging the closing springs
2 Signalling device for circuit-breaker open/closed
3 Rating plate
4 Opening pushbutton
5 Closing pushbutton
6 Signalling device for closing springs charged/discharged
7 Operation counter
8 Isolating contacts
Fig. 7
9 Slide for operating the switchgear shutters
10 Truck
11 Tab for hooking into the fixed part
12 Undervoltage release mechanical override (on request)
13 Strikers for activating the contacts placed in the enclosure
14 Connector (plug)
15 Cabling connection
16 Operating lever of circuit-breaker racking-in/out.
17 Handles for activating the locks (11)
18 Truck locator channel
4.3.2. Withdrawable circuit-breaker
The withdrawable circuit-breakers (see fig. 7) are available for
ABB PowerCube modules.
They consist of a truck on which the supporting structure of
the circuit-breaker is fixed.
The cord with the connector (14) (plug) for connection of the
operating mechanism electrical accessories comes out of the
connection (15).
The strikers for operating the contacts (racked-in/isolated)
placed in the switchgear are fixed in the top part of the
circuit-breaker.
The slides (9) for operating the segregation shutters of
the medium voltage contacts of the enclosure or of the
switchgear are fixed on the sides of the circuit-breaker.
On the front part of the circuit-breaker truck, the crosspiece
is mounted with the handles (17) for hooking up the circuit-
breaker for the racking-in/out operations by means of the
special operating lever (16). 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.
4.6.6. - 4.6.7.). A lock prevents the truck from advancing into
the enclosure or fixed part when the earthing switch is closed.
Another lock prevents racking-in and racking-out with the
circuit-breaker closed. With the truck in an intermediate
position between isolated and racked-in, a further lock
prevents circuit-breaker closing (either mechanical or
electrical).
A locking magnet is also mounted, on request, on the truck
which, when de-energised, prevents the truck racking-in
operation.
On request, an interlock is also available which prevents
circuit-breaker racking-in with the door open, and door
opening with the circuit-breaker closed.