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2019-03-06 / V1.0
Dangers and security measures
Contactors CT/CU Series – Installation and Maintenance Instructions
3. Dangers and security measures
3.1 Electrical dangers
DANGER
The contactors are high voltage switches. 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:
X
Disconnect on all sides
X
Ensure that it is not possible to reconnect unintentionally
X
Clearly mark your work area
X
Make sure that there is no voltage present
X
Earth and short circuit the installation; this also includes the discharging of any capacitors in
the main circuit
X
Besides the main electric circuit, also disconnect additional and auxiliary circuits
X
Cover or insulate adjacent energized parts
X
Only an electrically skilled person may determine if there is no voltage present
X
When the work has been concluded, proceed the other way round.
DANGER
The contactors are equipped with two protective caps for the coil terminal and auxiliary switches.
The protective caps are parts of the insulation system. Operation of the contactors without the pro-
tective cups may result in serious injuries or even death!
X
Never operate the contactors without the 2 protective caps.
X
When removing the protective caps during installation or maintenance works, make sure that
the protective caps are re-installed before the contactors are put into service.
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 specic short circuit
conditions.
DANGER
In the case of a failure of the equipment;
X
don‘t use it anymore
X
immediately contact the manufacturer.
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