ABB ConVac Installation And Operation Instruction Manual page 21

I N S T A L L A T I O N
- BS 2692 Standard with maximum distance L
=454 mm
5.7.3 Interlock of withdrawable version
• Electrical lock which prevents the contactor from
being closed when the truck is not in the racked-in
and isolated positions
• Mechanical lock which prevents the contactor
from being racked-in and out when it is closed
and closing of the contactor when the truck is
not in the racked-in and isolated positions
• Electrical lock which prevents closing of the
contactor when any one fuse is missing or blown
• Lock which prevents insertion of the plug-socket
and therefore apparatus (Fig 5c,interlock of
contactors with different rated current)
—
Fig 5b
5.8 Operation of the Contactors
5.8.1 Two operation modes for ConVac contactor:
electrical latching and mechanical latching
Type
Closing
Description
Inputs
Opening
Description
Inputs
• Locking electromagnet on the truck to prevent
racking-in/out when dis-energised. (Fig 5b-1)
• Mechanical lock which prevents contactor from
racking-in if the enclosure door is not closed
(Fig 5b-2)
• Mechanical interlock with earthing switch placed
on the enclosure ： with earthing switch closed
the contactor cannot be racked-in and with the
contactor racked-in or in intermediate positions
between racked-in and isolated, it is not possible
to close the earthing switch (Fig 5b-3)
5b-3
—
Fig 5c
5b-1
5b-2
Electrical latching
Closing takes place by supplying auxiliary
power to the feeder. The minimum duration
of closing impulse signal is 300 ms (a short
impulse signal will make the contactor
immediately opens after the closing
operation)
Fixed version: XDB1:1 - XDB1:3
Withdrawable version: XDB:31 - XDB:30
opening occurs when the auxiliary power
is interrupted either intentionally
Fixed version: XDB1:1 - XDB1:3
Withdrawable version: XDB:31 - XDB:30
Mechanical latching
Closing takes place when the opening coil
is Supplied. The minimum duration of
closing impulse signal is 300 ms
Fixed version: XDB1:1 - XDB1:3
Withdrawable version: XDB:4 - XDB:14
Opening takes place when the opening
coil is supplied. The minimum duration of
opening impulse signal is 300 ms
Fixed version: XDB3:1 - XDB3:3
Withdrawable version: XDB:31 - XDB:30
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