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2021-06-09 / V1.0
Hazards and safety precautions
Contactors CPP series – 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:
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.
DANGER
The contactors are equipped with a protective earth terminal. Without earth connection, metal
parts and wires may be energized in the case of a failure. Risk of serious injuries or even death!
X
Make sure that the contactors are connected to earth.
X
Make sure that the wire gauge of the earthing cables complies with the specific short circuit
conditions.
DANGER
In the case of a failure of the equipment;
X
don‘t use it anymore
X
immediately contact the manufacturer.
DANGER
Interventions in the equipment may cause serious impairments to the safety of men and constructi-
ons. They are not permissible and lead to an exclusion of liability and warranty.
DANGER
All checks and the raplacement of components or groups of components may only be carried out
by qualified personnel according to the instructions of Schaltbau. All spare parts must be parts deli-
vered by or released by Schaltbau..
