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2021-02-10 / V1.0
Contactors C195 Series – Installation and Maintenance Instructions
Maintenance
8.3.3 Replacing the complete contact
unit – type C195 X/
Spare parts required
-
Contact unit complete
(housing with contact bridge unit, main contacts,
arcing chambers and blowout unit with permanent
magnets) see chapter
“9. Spare parts”.
Tools required
-
Set of Torx bits or Torx 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 all connecting cables or busbars from the
main contacts, auxiliary switches and coil connec-
tions.
ATTENTION
Incorrect installation of the contact unit due to two
possible installation positions leads to malfunctions
and destruction of the contactor.
X
Before disassembling, note the orientation of
the old contact unit in relation to the base plate.
X
Disassemble the contact unit, see section
“Disas-
sembling/assembling the contact unit – type C195
X/” on page 36.
Assembly
ATTENTION
Incorrect installation of the contact unit due to two
possible installation positions leads to malfunctions
and destruction of the contactor.
X
Before installing the contact unit on the mag-
netic drive, observe the previously noted cor-
rect orientation in relation to the base plate.
X
Screw the new contact unit to the magnetic drive
using the two new screws supplied and tighten to
a torque of 0.8-1 Nm.
See section .
“Disassembling/assembling the
contact unit – type C195 X/“ on page 36.
X
Reconnect all connecting cables or busbars (main
contacts, auxiliary switches and coil connections),
see
“7.2 Electrical connection” on page 21.
X
Finally, subject the contactor to a complete check
as described in section
“7.4 Checks” on page 31
.
