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2019-08-07 / V1.0
Installation
Contactors C193/C294 – Installation and Maintenance Instructions
Safety
DANGER
The contactors are used to switch voltage. The touching of electrically conducting parts may result
in serious injuries or even death!
Energized parts are all metal parts belonging directly to one of the circuits or wires leading there. All
other visible metal parts and wires may also be energized in the case of a failure.
Before beginning any work on the contactors, always observe the following safety regulations:
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Disconnect on all sides
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Ensure that it is not possible to reconnect unintentionally
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Clearly mark your work area
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Make sure that there is no voltage present
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Earth and short circuit the installation; this also includes the discharging of any capacitors in
the main circuit
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Besides the main electric circuit, also disconnect additional and auxiliary circuits
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Cover or insulate adjacent energized parts
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Only an electrically skilled person may determine if there is no voltage present
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When the work has been concluded, proceed the other way round.
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.
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Record the frequency of screw opening in the work log.
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After 3 times opening of screws, replace detent-edged rings or detent-edged washers by new ones.
Required tools and auxiliaries
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Socket wrench set, hexagon nuts
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Open-end wrench set
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Torque wrench
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Continuity tester
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Cable ties
