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2021-02-10 / V1.0
Maintenance
Contactors C195 Series – Installation and Maintenance Instructions
8.3.2 Replacing the auxiliary switches –
type C195 X/
Under normal working condition (there have been no
short circuits in the control circuit) the life time of the
auxiliary switches exceeds those of the contactor.
However, in the event of a short circuit in the control
circuit, it is possible that the auxiliary switches may be
damaged and need to be replaced.
Spare parts required
-
Auxiliary switch assembly (2 auxiliary switches with
self-tapping screws), see chapter
“9. Spare parts”.
Tools required
-
Phillips screwdriver set
-
Continuity tester
-
Torque spanner
Disassembly
DANGER
Before beginning any work on the con-
tactors, make sure that
X
there is no voltage present,
X
all safety regulations are fully ob-
served.
X
Be sure to observe section
“8.1 Safety” on page 32
.
X
Remove the control wires from the auxiliary
switches.
X
Loosen the self-tapping screws (1) on the auxiliary
switches (2) and remove them.
X
Remove the auxiliary switches (2) from the contac-
tor top.
Assembly
X
Place new auxiliary switches (2) (with printed label
facing upwards) so that the locking pin (3) engag-
es in the second hole of the auxiliary switch.
X
Lightly screw on both auxiliary switches (2) with
new self-tapping screws (1).
X
If necessary, align the auxiliary switches (2) slightly.
-
The auxiliary switches must switch reliably!
X
Tighten the new self-tapping screws (1) to a torque
of 0.65-0.8 Nm.
X
Connect the control wires to the new auxiliary
switches (2), see section
“7.2 Electrical connec-
tion”/
“7.2.5 Connecting the auxiliary switches” on
page 23
.
X
Check the correct connection of the control wires-
to the auxiliary switches.
X
Use a continuity tester to check the correct assign-
ment and correct function of the auxiliary switch-
es.
X
Finally, subject the contactor to a complete check
as described in section
“7.4 Checks” on page 31
.
0.65-0.8 Nm
1
2
3
Fig. 50: C195 X/: Replacing the auxiliary switches
