16
2021-07-15 / V1.0
Installation
Contactors C320K/C320S – Installation and Maintenance Manual
Safety
DANGER
The contactors are used for high voltage switching. Contact with live electrical parts can result in
serious injuries or even death!
Live parts are all metal parts belonging directly to one of the circuits or wires connecting to them.
All other visible metal parts and wiring may also be live if a fault exists.
Before starting any work on the contactors, always comply with the following safety rules:
X
Disconnect on all sides
X
Secure to prevent switching back on
X
Clearly identify the working area
X
Check that a voltage-free state exists
X
Earth and short circuit; this includes discharging any capacitors in the main circuit
X
Besides the main power circuits, also disconnect additional and auxiliary circuits
X
Cover or insulate adjacent live parts
X
The presence of a voltage-free state can only be clearly identified by a qualified electrician.
X
When the work has been concluded, follow the procedure in reverse.
ATTENTION
Detent-edged rings and detent-edged washers have
a limited life time. After screws secured with detent-
edged rings or detent-edged washers have been
undone three times, the rings or washers must be
replaced by new ones.
X
Record the frequency of undoing of the screws
in the work log.
X
Replace detent-edged rings or detent-edged
washers with new ones after the screws have
been undone three times.
Tools required
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Socket spanner set, hexagon nuts
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Open-ended spanner set
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Torque wrench
X
Continuity tester
X
Cable ties
