15
ANTRIEBSTECHNIK
2.5 Electrical Connection
Before any installation and connection work, the system must be switched off and
secured. After clearing the frequency inverter / servo drive the intermediate circuit
capacitors are still charged with high voltage for a short period of time. The unit can be
worked on again, after it has been switched off for 5 minutes.
The terminals of the control terminal strip and the transmitter inputs are securely
isolated in accordance with EN 50178. With existing or newly wired circuits the person
installing the units or machines must ensure the EN requirements are met.
With frequency inverters / servo drives that are not isolated from the supply circuit
(EN 50178) all control lines must be included in other protective measures (e.g. double
insulation or shielded, earthed and insulated). Further information is found in the
technical documentation part 3.
Connection of the frequency inverter / servo drive is only permissible on symmetrical
networks with a maximum line voltage (L1, L2, L3) with respect to earth (N/PE) of 300V.
An isolating transformer must be used for supply networks which exceed this value! The
units may be damaged if this is not observed.
The frequency inverter / servo drive can be connected to power systems with earthed
external conductors (e.g. delta power systems) if the following exceptions apply:
•
the control system is no longer regarded as “securely isolated circuit”, further
protection measures are therefore required (see “Connection of the Control Lines”)
•
with this type of power system, the max. voltage phase / earth must not exceed
500 V absolute
The frequency inverter / servo drives are designed for fixed connection only as
discharge currents of > 3.5 mA may occur especially when using EMI filters. It is
therefore necessary to lay a protective conductor with a section of at least 10mm
2
(copper) or a second protective conductor in compliance with EN 50178. Ground point-
to-point with the shortest connection possible to mains earth (avoid earth loops).
•
Stationarily install and earth frequency inverters / servo drives.
•
Maintain minimum spaces to surrounding elements when setting up (see Installati-
on of the Switch Cabinet in the Technical Documentation Part 2)
•
Rack devices are designed for vertical installation and can be placed one next to the
other. Maintain a minimum space of 50mm to previous elements. Ensure sufficient
cooling.
•
In regulated systems use original KEB cables as motor and transmitter cables only.
•
The device must not be permeated by mist or water.
•
Avoid dust permeating the device. Allow for sufficient heat dissipation if installed in a
dust-proof housing.
•
Do not operate the frequency inverter / servo drive in explosion-proof spaces!
Install the frequency inverter / servo drive in an appropriate housing in accordance
with the local regulations when operating it in explosion-proof spaces.
•
Protect the frequency inverter / servo drive against conductive and aggressive gases
and liquids.
2.4 Notes on installation
Note Capacitor
Discharge Time
Voltage with
respect to ground
Only Fixed
Connection
Control Lines
Secure isolation
Earthed external
conductor
Содержание COMBIVERT Series
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