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2021-04-12 / V1.1
Contactors CP Series – Installation and Maintenance Instructions
Maintenance
9.3 Corrective maintenance
The contactors are maintenance-free within the rated
mechanical life time. The electrical life time depends on
the number of switchings under heavy load conditions
and may vary for dierent applications. In normal use,
this corresponds to a decade-long operating period.
However, in case of permanent heavy load switchings,
failures, short-circuit switchings or in similar cases cor-
rective maintenance may be necessary.
WARNING
The use of unsuitable parts can lead to
accidents and serious personal injury
due to malfunctions.
X
Only use original spare parts!
X
Do not combine single parts from
dierent contactors!
9.3.1 Replacing the complete arc
chamber unit
Safety
DANGER
Before beginning any work on the contac-
tors, make sure that
X
there is no voltage present,
X
all safety regulations are fully ob-
served.
X
Refer also to section „Dangers and
security measures“ on page 6.
Spare parts required
- Arc chamber complete, see chapter “10. Spare parts”
Tools required
- No tools required.
Removing the arc chamber unit
X
Press and hold the 4 locking brackets at the top
towards the unit (1) so that they release from the
locking knobs (3) at the bottom.
X
Remove the complete arc chamber unit (2) up-
wards from the magnetic drive unit (4).
2
1
4
3
Fig. 29: Remove and install the arc chamber unit (large arc
chamber)
2
1
4
3
Fig. 30: Remove and install the arc chamber unit (medium arc
chamber)
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