ABB VD4/R Installation And Maintenance Instructions Manual page 11

5.4. Circuit-breakers for ABB switchgear
Circuit-breakers (see fig. 5) available for UniSwitch, UniAir and UniMix
switchgear.
They are basically derived from a fixed circuit-breaker to which the
wheels, isolating contacts, locking lever and connector are applied.
3
4
Caption
1 Isolating contacts
2 Wheels
3 Release lever
4 Connector
Fig. 5
Standard fittings for ABB switchgear circuit-breaker
1. Circuit-breakers for UniSwitch switchgear with right
lateral operating mechanism (centre distance 210 mm)
The basic coded version of the VD4/S circuit-breakers for UniSwitch
switchgear is the same as that of the fixed circuit-breakers with the
following exceptions and specific fittings:
– base fitted with wheels to facilitate handling and racking into the
compartment of the UniSwitch switchgear,
– top and bottom terminals prepared for connection to the busbars of
the UniSwitch switchgear
– insulating caps to be installed on the upper part of the poles (after
having connected the busbars to the top terminals)
– special connector (58-pole male socket) fixed onto the right side of
the operating mechanism casing. The connector is fitted with a lock
which does not allow manual operation unless the plug fitted with the
special insulating release pin is inserted
– insulating release pin to be inserted in the plug (58-pole female) to
disable the lock which does not allow manual operation unless the
plug is inserted in the socket on the operating mechanism.
On request and on payment, a set of 12 auxiliary contacts is available,
alternatively to the group of 5 open/closed auxiliary contacts. Each shunt
opening release uses one NO auxiliary contact to de-energise after
having carried out circuit-breaker opening, therefore for each shunt
opening release installed there is one NO auxiliary contact less available.
1 1 1
1
2
1
2
2. Circuit-breakers for switchgear UniMix with right lateral
operating mechanism (centre distance 230 mm)
The basic coded version of the circuit-breakers for UniSwitch switchgear
is the same as that of the fixed circuit-breakers. The operating mechanism
casing is fitted with a side frame specific to the UniMix unit which the
circuit-breaker must be racked into. In particular:
– type VD4/UniMix-F has the top and bottom terminals prepared for
connection to the busbars of the UniMix switchgear P1/F unit.
Alternatively and on payment, 10 or 15 auxiliary contacts are available.
Each shunt opening release uses one NO auxiliary contact to de-
energise after having carried out circuit-breaker opening, therefore
for each shunt opening release installed there is one NO auxiliary
contact less available
– type VD4/UniMix-R has a base fitted with wheels to facilitate handling
and racking into the switchgear compartment, a power cord with 58-
pole plug for the auxiliary circuits, and the top and bottom terminals
prepared for connection to the busbars of the UniMix switchgear P1/
F unit. Alternatively and on payment, 12 auxiliary contacts are available.
Each shunt opening release uses one NO auxiliary contact to de-
energise after having carried out circuit-breaker opening, therefore
for each shunt opening release installed there is one NO auxiliary
contact less available.
3. Circuit-breakers for switchgear UniAir with right lateral
operating mechanism (centre distance 300 mm)
The basic coded version of the circuit-breakers for UniAir switchgear is
the same as the one for the fixed circuit-breakers. The operating
mechanism casing is fitted with a side frame specific to the UniAir unit
which the circuit-breaker must be racked into. In particular:
– type VD4/UniAir has the base fitted with wheels to facilitate handling
and racking into the switchgear compartment, a power cord with 58-
pole plug for the auxiliary circuits, the top and bottom terminals pre-
pared with flat contacts for connection to the isolator on the supply
side and to the busbars (or DIN CT) on the load side of the UniAir
switchgear P1/E unit, and the release lever which keeps the circuit-
breaker locked in the unit.
Alternatively and on payment, 12 auxiliary contacts are available.
Each shunt opening release uses one NO auxiliary contact to de-
energise after having carried out circuit-breaker opening, therefore
for each shunt opening release installed there is one NO auxiliary
contact less available
– type VD4/UniAir-2R has the base fitted with wheels to facilitate han-
dling and racking into the switchgear compartment, a power cord with
58-pole plug for the auxiliary circuits and the top and bottom terminals
prepared with pliers for connection to the isolator on the supply and
load side of the UniAir switchgear P1E/2R unit, and the release lever
which keeps the circuit-breaker locked in the unit. Alternatively and
on payment, 12 auxiliary contacts are available. Each shunt opening
release uses one NO auxiliary contact to de-energise after having
carried out circuit-breaker opening, therefore for each shunt opening
release installed there is one NO auxiliary contact less available
– type VD4/UniAir-A has the base fitted with wheels to facilitate handling
and racking into the switchgear compartment, a power cord with 58-
pole plug for the auxiliary circuits, the top fixed terminals and the
bottom terminals are prepared with pliers for connection to the
busbars/CT on the supply side and to the isolator on the load side of
the UniAir switchgear P1/A unit, and the release lever which keeps
the circuit-breaker locked in the unit. Alternatively and on payment, 12
auxiliary contacts are available. Each shunt opening release uses a
NO auxiliary contact to de-energise after having carried out circuit-
breaker opening, therefore for each shunt opening release installed
there is one NO auxiliary contact less available
– type VD4/UniAir-F is without wheels and power cord and only has the
fixed bottom and top terminals prepared with pliers for connection to
the busbars/CT on the load side of the UniAir switchgear P1/F unit.
Alternatively and on payment, 10 or 15 auxiliary contacts are avail-
able. Each shunt opening release uses one NO auxiliary contact for
de-energise after having carried out circuit-breaker opening, there-
fore for each shunt opening release installed there is one NO auxiliary
contact less available.
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