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Installation
Electrical
The following requirements and conditions must be met to connect the
connection
NEA/NEG electrically:
• The permissible operating conditions must be met. Please refer to
• A suitable overload protection (1) must be
•
•
• Only suitable, flexible supply cables must be used for connecting the
• All electrical cables must be carefully laid and must be protected from
•
16
chap. Technical data, page 11 for operating conditions.
pre-connected to each vibrator. The motor
protection switches must be interlocked with
each other in pairs, so that in the event of a
motor failure, the power supply from both
motors is interrupted at the same time in or-
der not to cause uncontrolled vibrations
which can damage the system.
In zone 21/22 the motor protection
switches must be approved for applications
in potentially explosive areas.
If the vibrator is operated in areas with potentially explosive dust
(zone 21/22), it is compulsory to connect the PTC-thermistor. This reg-
ulation does not apply for NEA/NEG without a PTC-thermistor.
In areas with potentially explosive
dust (zone 21/22), an external
grounding must also be made via the
earth connection on the housing foot.
NEA/NEG. The conductors in the supply cable for the connection of the
NEA/NEG to the mains must be temperature-resistant and have a suf-
ficiently large cross-section, which is adapted to the cable length used.
The temperature resistance of the cables depends on the maximum
surface temperature (temperature class T) stated on the type plate.
When selecting the connection cables, consider that the cables are
mechanically stressed by vibration. Recommended cable types for
mains operation at 400 V, in potentially non-explosive atmosphere:
rubber hose line H07 RN-F or oil flex cable 110 CY.
For other voltages or other ambient conditions, the cables must be
adapted to the respective conditions and designed accordingly.
high temperatures, lubricants and sharp edges. Care must be taken to
ensure that the cables are not chafed through by vibrating parts. The
correct condition of the electrical cables with their plugs must be
checked at regular intervals (usually every six months). Detected er-
rors are to be eliminated immediately.
The cable fastening must be provided in close vicinity of the cable
entrance.
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