![Rockwell Automation Allen-Bradley PowerFlex 700AFE Скачать руководство пользователя страница 63](http://html.mh-extra.com/html/rockwell-automation/allen-bradley-powerflex-700afe/allen-bradley-powerflex-700afe_user-manual_1475494063.webp)
Rockwell Automation Publication 20Y-UM001F-EN-P - April 2017
63
AFE in IP21 Rittal Enclosure – Installation/Wiring
Chapter 2
Shielded Cable
Shielded cable contains the benefits of multi-conductor cable with the added
benefit of a copper braided shield that can contain much of the noise that is
generated by a typical AC drive. Consider shielded cable in installations with
sensitive equipment such as weigh scales, capacitive proximity switches, and
other devices affected by electrical noise in the distribution system.
Applications with large numbers of drives in a similar location, imposed EMC
regulations, or a high degree of communication and networking are also good
candidates for shielded cable.
Consider the general specifications that are dictated by the environment of the
installation, including temperature, flexibility, moisture characteristics, and
chemical resistance. Also, include a braided shield that is specified by the
manufacturer as having coverage of at least 75%. An additional foil shield can
improve noise containment.
A good example of recommended cable is Belden 29528 - 29532 (AWG-1
through AWG-410). This cable has three XLPE insulated conductors plus
ground with a spiral copper shield that is surrounded by a PVC jacket.
Armored Cable
Cable with continuous aluminum armor is often recommended in drive system
applications or specific industries. It offers most of the advantages of standard
shielded cable and also combines considerable mechanical strength and
resistance to moisture. It can be installed in concealed and exposed manners,
and removes the requirement for conduit (EMT) in the installation. It can also
be directly buried or embedded in concrete.
Because noise containment is affected by incidental grounding of the armor to
building steel when the cable is mounted, we recommend that the armored
cable has an overall PVC jacket. See Chapter 2, ‘Wire Types’ in Wiring and
Grounding Guidelines for Pulse Width Modulated (PWM) AC Drives,
publication
Interlocked armor is acceptable for shorter cable runs, but continuous welded
armor is preferred.
Best performance is achieved with three spaced ground conductors, but
acceptable performance below 200 Hp is provided by use of one ground
conductor.
Содержание Allen-Bradley PowerFlex 700AFE
Страница 8: ...8 Rockwell Automation Publication 20Y UM001F EN P April 2017 Table of Contents Notes ...
Страница 124: ...124 Rockwell Automation Publication 20Y UM001F EN P April 2017 Chapter 4 Programming and Parameters Notes ...
Страница 136: ...136 Rockwell Automation Publication 20Y UM001F EN P April 2017 Chapter 5 Troubleshooting Notes ...
Страница 158: ...158 Rockwell Automation Publication 20Y UM001F EN P April 2017 Appendix A Supplemental Information Notes ...
Страница 164: ...164 Rockwell Automation Publication 20Y UM001F EN P April 2017 Appendix B HIM Overview Notes ...
Страница 180: ...180 Rockwell Automation Publication 20Y UM001F EN P April 2017 Index by number 120 linear list 120 viewing 163 ...
Страница 184: ...184 Rockwell Automation Publication 20Y UM001F EN P April 2017 Index Notes ...
Страница 185: ......