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2019-08-07 / V1.0
Contactors C193/C294 – Installation and Maintenance Instructions
Installation
Correct mounting positions
The contactors are designed for horizontal or vertical
mounting positions.
Examples for intended mounting positions are shown
in
Fig. 5/(A).
Not permissible are suspended or inverted mounting
position as shown in
Fig. 5/(B).
A
B
Fig. 5:
Examples for intended mounting positions (A) and
not permissible mounting positions (B)
(the figure shows the C193 series, the intended
mounting positions for the C294 series are the same)
Required minimum clearance
NOTICE
Switching electrical currents at high voltages will
produce arcing and plasma may exit out of the arc
chute. It is essential to observe the minimum clear-
ance towards earthed and live parts to avoid the risk
of a flash-over.
X
Observe the minimum clearance towards earthed
and live parts to plasma exits! Refer to the dimen-
sion drawings in our
catalogues B193
and
B294
for
minimum clearance upwards and to all sides.
The
catalogues
are available under:
https://www.schaltbau.com/en/media-library/
Ventilation requirements
X
Ensure sufficient ventilation, especially in the case
of heavy arc switching. Allow the exchange of sur-
rounding atmosphere to avoid the risk of flash-
overs and excessive corrosion.
Safety
X
The installation has to be carried out by qualified
trained personnel.
NOTICE
During installation, ensure that dirt caused by sur-
rounding construction activities does not get into
the contactor.
NOTICE
Detent-edged rings and detent-edged washers have
a limited life time. After 3 times opening of screws
secured with detent-edged rings or detent-edged
washers, the rings or washers must be replaced by
new ones.
X
Record the frequency of screw opening in the
work log.
X
After 3 times opening of screws, replace detent-
edged rings or detent-edged washers by new
ones.
Required tools and auxiliaries
-
Socket wrench set, hexagon nuts
-
Hexagon socket wrench set
-
Torque wrench
