Toshiba CV-1GAU Instruction Manual page 19

MAINTENANCE
Table 2 - Check Points for Periodic Inspection
Check Check Item
Point
Operating Loose bolts,
Mechanism nuts or
screws
Dust or
foreign
matter inside
Smooth
operation
Main Circuit Terminals
and movable
conductors.
Loose bolts,
nuts or
screws
Vacuum
contact wear.
Vacuum
level.
Lubrication
Check Method
Tighten using
screwdriver or wrench.
Visual inspection.
Visual inspection or
touch. Check
lubrication.
Visual inspection.
Tighten using
screwdriver or wrench.
Tighten using a
wrench.
See Electrical Service
Life (Page 22) and
Table 3.
Apply 10kV AC for 1
minute.
See Electrical Service
Life (Page 22).
Criteria
Make sure all bolts,
nuts and screws are
tight.
The contactor should
be clean and contain
no foreign matter.
Make sure moving
parts operate
smoothly.
Make sure there is no
discoloration or loose
fasteners.
Make sure all bolts,
nuts and screws are
tight.
Check contact wear,
wipe.
Check vacuum level
by withstand voltage
test.
Check grease on
interrupter shaft and
bearing washer
Page 17
Disposition
Tighten if loose.
See (Table 1) for
tightening torque
specifications.
Wipe with a clean
dry cloth.
Wipe with a clean
dry cloth. Lubricate if
necessary
Check the cause
and repair. Tighten
connections to
contactor. See
(Table 1 )for
tightening torque
specifications.
See (Table 1) for
tightening torque
specifications.
Contact factory.
If breakdown occurs,
contact Toshiba.
Lubricate if
necessary.