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2021-02-10 / V1.0
Maintenance
Contactors C195 Series – Installation and Maintenance Instructions
8.4.5 Replacing the arcing chamber –
type C195 A/ und C195 B/
Spare parts required
-
Arcing chamber complete (arcing chamber with ar-
cing plates), 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 the cover from the contac unit, see section
“Removing/attaching the cover – type C195 A/, B/,
S/, T/, W/” on page 50.
X
Hold the lower part of the contact unit (2) and pull
out the arcing chamber (13) upwards.
13
2
18
Fig. 73: C195 A/, C195 B/: Removing/attaching the arcing
chamber (the figure shows C195 A/, the procedure is
identical for C195 B/)
Assembly
ATTENTION
Incorrect installation of the arcing chamber due to
two possible installation positions can caus malfunc-
tions and destruction of the contactor.
X
Before installing the arcing chamber, make sure
that the open end of the U-shaped metal brack-
et (18) points upwards, see
Fig. 73
.
X
Push the new arcing chamber (13) into the contact
unit (2) as far as it will go.
X
Place the cover on the contact unit (2).
-
Make sure that the contact bridge does not
twist.
-
See also section
„Removing/attaching 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.
X
Finally, subject the contactor to a complete check
as described in section
“7.4 Checks” on page 31
.
