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2021-07-15 / V1.0
Hazards and safety precautions
Contactors C320K/C320S – Installation and Maintenance Manual
3. Hazards and safety precautions
3.1 Electrical hazards
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:
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Disconnect on all sides
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Secure to prevent switching back on
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Clearly identify the working area
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Check that a voltage-free state exists
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Earth and short circuit; this includes discharging any capacitors in the main circuit
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Besides the main power circuits, also disconnect additional and auxiliary circuits
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Cover or insulate adjacent live parts
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The presence of a voltage-free state can only be clearly identified by a qualified electrician.
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When the work has been concluded, follow the procedure in reverse.
3.2 Other hazards
WARNING
Contactors must only be used for the purposes specified in the specifications and data sheets. Incor-
rect use can cause accidents and severe personal injury.
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The manufacturer will not be responsible for accidents arising from improper use of the product.
CAUTION
During continuous operation the contactors may become hot. Risk of burns!
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Before beginning any checks or maintenance on the contactors ensure that the heated com-
ponents have cooled down.
CAUTION
The contactors contain sharp-edged parts. Risk of injuries!
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Use appropriate tools for installation and maintenance work on the contactors.
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Wear safety gloves when handling sharp-edged components.
