Electrical Installation; Cleaning And Maintenance - Kübler 924-6 Mode D'emploi

2.3

Electrical Installation

The device must be disconnected
from any power supply prior to any
installation or maintenance work.
Make sure that no more voltages
DANGER
LIABLE TO CAUSE AN ELECTROCUTION
are present.
AC-powered devices must only be
connected to the low-voltage
network via a switch or circuit
breaker installed close to the device
and marked as their disconnecting
device.
Installation or maintenance work
must only be carried out by qualified
personnel and in compliance with
the applicable national and
international standards.
Take care to separate all extra-low
voltages entering or exiting the
device from hazardous electrical
conductors by means of a double or
reinforced insulation (SELV
circuits).
The device must be protected
externally for its proper operation.
Information about the prescribed
fuses can be found in the technical
DANGER
information.
The relay outputs are not protected
internally in the device. Without
suitable protection of the relay
outputs, undesired heat development
or even fire may occur. The relay
outputs must be protected externally
by the manufacturer of the plant. It
must also be made sure that, even in
case of a malfunction, the values
stated in the technical data are under
no circumstances exceeded.
• During installation, make sure that the supply
voltage and the wiring of the output contacts
are both fed from the same mains phase, in
order not to exceed the maximum permitted
voltage of 250V.
• The cables and their insulation must be
designed for the planned temperature and
voltage ranges. Regarding the type of the
cables, adhere to the applicable standards of
the country and of the plant. The cross sections
allowed for the screw terminals can be found in
the technical data.
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Before starting the device, check the cables for
•
proper wiring and tightening. The screws of
unused screw terminals must be screwed to the
stop, so that they cannot loosen and get lost.
The device has been designed for overvoltage
•
category II. If higher transient voltages cannot
be excluded, additional protection measures
must be taken in order to limit the overvoltage
to the values of CAT II.
Advice on noise immunity
All connections are protected against external
sources of interference. The installation location
should be chosen so that inductive or capacitive
interference does not affect the device or its
connecting lines! Interference ( e.g. from switch-
mode power supplies, motors, clocked controllers
or contactors) can be reduced by means of
appropriate cable routing and wiring.
Measures to be taken:
Use only shielded cable and control lines.
•
Connect shield at both ends. The conductor
cross-section of the cables should be a
minimum of 0.14 mm².
The shield connection to the equipotential
•
bonding should be as short as possible and
with a contact area as large as possible (low-
impedance).
• Only connect the shields to the control panel, if
the latter is also earthed.
• Install the device as far away as possible from
noise-containing cables.
Avoid routing signal or control cables parallel to
•
power lines.
2.4

Cleaning and maintenance

The front side of the unit should only be cleaned
using a soft damp (water!) cloth. Cleaning of the
embedded rear side is not planned and is the
responsibility of the service personnel or of the
installer.
In normal operation, this device is maintenance-
free. Should the device nevertheless not operate
properly, it must be sent back to the manufacturer
or to the supplier. Opening and repairing the device
by the user is not allowed and can adversely affect
the original protection level.
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