57
2021-02-10 / V1.0
Contactors C195 Series – Installation and Maintenance Instructions
Maintenance
8.4.6 Replacing the contact bridge unit –
type C195 A/, B/, S/, T/, W/
Spare parts required
-
Contact bridge unit, 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
„Di-
sassembling/assembling the contact unit –
type C195 A/, B/, S/, T/, W/“ on page 46.
X
Remove the armature at the bottom of the con-
tact unit, see section
“Disassembling/assembling
the armature – type C195 A/, B/, S/, T/, W/” on page
48.
X
Remove the cover, see section
“Removing/attach-
ing the cover – type C195 A/, B/, S/, T/, W/” on page
50.
X
Disassemble the contact bridge unit, see section
“Disassembling/assembling the contact bridge
unit – type C195 A/, B/, S/, T/, W/” on page 51.
Assembly
X
Insert the new contact bridge unit into the contact
unit. See section
“Disassembling/assembling the
contact bridge unit – type C195 A/, B/, S/, T/, W/”
on page 51.
X
Install the armature at the bottom side of the con-
tact unit. See section
“Disassembling/assembling
the armature – type C195 A/, B/, S/, T/, W/” on page
48.
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
Carefully place the contact unit on the magnetic
drive.
X
Place the cover on the contact unit
“Removing/at-
taching the cover – type C195 A/, B/, S/, T/, W/” on
page 50.
X
Tighten the contact unit including cover to a
torque of 0.8-1 Nm. See section
“Disassembling/
assembling the contact unit – type C195 A/, B/, S/,
T/, W/” on page 46.
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
.
