Electrical Installation; Safety Precautions; Emc-Compatible Installation; Motor Cable - Helios FU-BS Series Installation And Operating Specification

Installation and Operating Specification FU Basic

5 Electrical installation

5.1

Safety precautions

Danger due to electric current
Work on electric components may only be carried out by trained electricians or by persons
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instructed in electricity under the supervision of an electrician in accordance with electrical
engineering regulations.
The 5 electrical safety rules must be observed!
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• It is forbidden to carry out work on electrically live parts. Even after disconnection, the dc-link is still
live. Always wait at least 3 minutes.
Cover neighbouring electrical equipment during installation work.
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Other measures may be necessary to achieve safe electrical isolation.
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• A second person must always be present when working on energized parts or lines who
disconnects in case of emergency.
Inspect electrical equipment periodically: retighten loose connections – immediately replace
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damaged lines and cables.
Always keep switch cabinets and all electrical supply facilities locked. Access is only allowed for
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authorized persons using a key or special tool.
• Operating the device with the housing cover removed is prohibited because energized, exposed
parts are present inside the device. Disregarding this regulation can lead to severe personal injury.
For metal cable inlets the necessary protective earth connection to the bottom of the housing is
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made by screws. The device may only be started up when these screws are fitted properly.
• The required protective earth connection is established using screws between the housing parts in
metal terminal space covers and housing casings. Commissioning is only permissible after these
screws have been properly attached!
• Metal screwed-connections are not permitted in plastic housing parts because there is no potential
equalization.
The device owner is responsible for the EMC of the entire plant according to the locally applicable
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standards.
• Never clean electrical equipment with water or similar liquids.
Information
The respective connections are represented in the enclosure of this manual (
5.2

EMC-compatible installation

5.2.1

Motor cable

The applicable standard for interference emissions is EN 61000-6-3. Compliance with this standard is
achieved through the use of an unscreened motor feed cable.
5.2.2

Control cables

Pay attention to sufficient distance from powerlines and motor wires to prevent interferences. The
control cable may not be longer than 30 m. Screened control cables must be used when the cable
length is longer than 20 m. When using a shielded cable connect the shielding to one side only, i.e.
only to the control unit with the protective ground (keep cable short and with as little inductance as
possible!).
5.2.3 Harmonics current for devices ≤ 16 A
According to EN 61000-3-2 these devices are to be classified as "professional" devices.
Connection to a low voltage supply (public networks) is allowed insofar as this has been clarified with
the respective energy supply company responsible.
L-BAL-E187-GB 1703 Index 002 Part.-No.
9/22
Electrical installation
Connection diagram)!