Electromagnetic Contactor, Relay; Fuse - KITO ER2 Serie Manuel Du Propriétaire

Electromagnetic Contactor, Relay

Symptom Cause
Electric chain hoist Electromagnetic
does not stop Contact point
welding, or fusing
Electric chain hoist Burnout or
does not operate. breakage of relay
coil or contactor coil
Damaged moving
parts

Fuse

Symptom Cause
Electric chain hoist
Blown out
does not operate.
(Electromagnetic
Contactor does not
operate.)
Remedy
Operate the contactor manually to check
the conduction.
When the contact point is welded or
fused, replace the contactor.
When the device is a miniature relay,
check the contact point visually.
Measure the resistance of relay coil or
contactor coil. If it is infinity, replace the
relay or the contactor.
Operate the Electromagnetic contactor
by its manual operation part. Replace the
contactor if it does not move smoothly.
Check the miniature relay visually if it
does not have damaged part.
Remedy
Check the conduction of the fuse. When
no conduction, check the cause and then
replace the fuse.
Main factor Countermeasure
Excessive inching or Do not perform excessive
plugging operation operation.
(consecutive
impression of start
rush current)
Over voltage Operate the electric chain
hoist with the rated voltage.
Over current due to Use the electric chain hoist
over load with a load less than the
capacity.
Excessive inching or Do not perform excessive
plugging operation operation.
(consecutive
impression of start
rush current)
Over voltage Operate the electric chain
hoist with the rated voltage.
Chattering due to low Operate the electric chain
voltage (consecutive hoist with the rated voltage.
impression of start
rush current)
Vibration, impact Use the electric chain hoist
avoiding the impact.
Main factor Countermeasure
Short circuit of the Refer to the items related
control circuit, burnout to the electrical part in
of electrical part failure.
Over current due to Refer to the items of
defective operation Electromagnetic Contactor.
of Electromagnetic
contactor
3
(to be continued)
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