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2021-04-12 / V1.1
Contactors CP Series – Installation and Maintenance Instructions
Maintenance
NOTICE
Detent-edged rings and detent-edged washers have
a limited life time. After 3 times opening of screws
secured with detent-edged rings or detent-edged
washers, the rings or washers must be replaced by
new ones.
X
Record the frequency of screw opening in the
work log.
X
After 3 times opening of screws, replace detent-
edged rings or detent-edged washers by new
ones.
9.2.2 Regular check activities
All of the maintenance activities that may be carried out
on the contactors by skilled personnel are listed below:
Component Visual inspection Measures
High voltage cables
or busbars
Check for:
X
dirt
X
damage or wear
X
corrosion
X
broken cables, ring terminals
X
damaged insulation
X
damaged busbars
X
kinked or crushed cables
X
loose or missing fastening elements
X
correct torque of the terminal screws
In case of faults:
X
remove any existent dirt
X
replace damaged cables or ring terminals
immediately
X
remove corrosion and replace corroded
parts
X
replace damaged busbars immediately
X
tighten loose fastening elements and
replace missing fastening elements im-
mediately
X
tighten the terminal screws with the
rated torque
Earthing cable/strap
and ring terminal
Check for:
X
dirt
X
damage or wear
X
corrosion
X
broken cable/strap, ring terminals
X
damaged insulation
X
kinked or crushed cable/strap
X
loose or missing fastening elements
X
correct torque of the earthing terminal screw
In case of faults:
X
remove any existent dirt
X
replace a damaged earthing cable/strap
or damaged ring terminals immediately
X
remove corrosion and replace corroded
parts
X
tighten loose fastening elements and
replace missing fastening elements im-
mediately
X
tighten the earthing terminal screw with
the rated torque
Contactor/base plate
mounting
Check for:
X
loose or missing fastening elements
In case of faults:
X
tighten loose fastening elements and
replace missing fastening elements im-
mediately
X
x a loose contactor