10.1 Truck cannot enter cubicle.
10.1.1 Current interlock code of the contactor
truck.
Solution: Select contactor truck of correct
current rating.
10.1.2 Racking mechanism not closed against
the front of the truck.
Rotate racking handle to the anti-clockwise stop.
10.1.3 Truck on service trolley
Truck is not parallel with the rails, adjust the
height on the service trolley.
10.2 Truck cannot be locked in cubicle.
10.2.1 Earth switch is at the open position.
Close earth switch.
10.2.2 Truck on service trolley.
Push truck inside panel and using inertia, turn
truck lock clockwise using double-bit key.
10.3 Truck cannot be racked in.
10.3.1 Handle not fully engaging the racking
screw shaft.
Push firmly on the handle. Maintain positive
forward pressure on the handle during rotation.
10.3.2 Truck locking bars not fully extended.
Rattle the truck in position and make sure the
key spindle pops out at the clockwise stop.
10.3.3 Shutters padlocked.
Remove padlocks.
10.3.4 Front door not completely closed.
Tighten door screws.
10.3.5 Earth switch is closed.
Open earth switch.
10.3.6 Racking hole padlocked.
Remove padlock.
10.3.7 Contactor on.
Open contactor.
10.3.8 Truck with blocking coil.
Energise blocking coil.
10.4 Truck cannot be removed from cubicle.
10.4.1 Truck not fully in isolated/test position
Rotate racking handle to anti-clockwise stop.
10.4.2 Truck locked in cubicle
Unlock truck.
Caution!
It is strongly recommended the main
busbar is shut down before opening the
panel front door.
10.4.3 Racking blocking coil defective when
truck is in SERVICE position.
Switch the contactor OFF.
Open the panel first door in accordance with the
site safety procedures.
Use a screw driver to defeat the racking interlock
as shown in the picture.
Close the front door.
Withdraw the contactor from SERVICE to
TEST/ISOLATED position.
Replace the racking blocking coil as described
at 9.4.3.4.
10.4.4 Contactor on.
Open contactor.
10.5 Vacuum contactor cannot be closed.
10.5.1 Racking operation not completed.
(mechanical and electrical block)
Rotate handle fully to stop.
10.5.2 Secondary control plug damaged.
Check secondary control plug for damage.
10.5.3 No control supply available.
Check control fuses.
10.5.4 Fuse blown auxiliary switch not reset.
10.5.5 Vacuum contactor auxiliary switches
inoperative.
Check operation of auxiliary switches. Replace
if necessary.
10.5.6 Open circuit close coil.
Contact ABB to replace close coil.
10.6 Earth switch cannot be closed.
10.6.1 Earth switch operating hole cover is
padlocked.
Remove padlock.
10.6.2 Truck in service or intermediate position.
Rack truck out to hard stop in ISOLATED
position.
T R O U B L E S H O O T I N G
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