Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 12 of 12
  1. #1
    Join Date
    Aug 2008
    Location
    Toowoomba
    Posts
    21

    Default Do I need shielded cable when connecting a Powtran PI8100

    In the "Guide to using a Powtran" page on the Clearvue Aus website it states "It is preferable to use a shielded cable for this linkto avoid any radio interference."
    How important is this given that the workshop is 50 metres from the house? What might cause interference for a Powtran?
    The reason I am asking is that there is a $100 cutting fee for Shielded Cable, wether you need 1m or 20m. Does that sound feasible? I am connecting to a 3kw motor about 2m from the Powtran.

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #2
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,757

    Default

    Give that distance and the length of the cable I wouldn't bother.


    There are 8 machines on inverters in my shed and it is not unusual to have a couple running at the same time - none are using shielded cable.
    The shed is ~ 10 m from our house and about the same distance from 5 other neighbour's houses.
    The radio interference caused by these inverters inside the shed is pretty bad and it interferes significantly with AM radio reception but the shed is Colourbond and seems to contain most of the interference inside the shed. It also kills WIFI reception from the house
    I can hear the interference immediately outside the shed on the AM band but it drops off rapidly with distance and I cannot hear the noise on the AM band up at the house.

    As far as radio reception inside the shed goes I switched to a digital radio and this works fine.

  4. #3
    Join Date
    Aug 2010
    Location
    ACT
    Age
    84
    Posts
    2,579

    Default

    Hi,
    You could install it in metal conduit, the flexible stuff known as Anaconda by the sparkies.
    Regards
    Hugh

    Enough is enough, more than enough is too much.

  5. #4
    Join Date
    Jan 2007
    Location
    Katoomba NSW
    Posts
    4,770

    Default

    Anaconda is around $300 for a 15m roll and $30 each for fittings.
    I wouldn't bother with screened cable for a short run.
    Those were the droids I was looking for.
    https://autoblastgates.com.au

  6. #5
    Join Date
    Jun 2005
    Location
    Helensburgh
    Posts
    7,696

    Default

    A filter can be used also, NC Archer would know more than me about this as I have no idea if they are a generic style of thing or not.
    CHRIS

  7. #6
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,757

    Default

    I wonder how well stainless steel shower hose would work as shielding?

  8. #7
    Join Date
    Aug 2008
    Location
    Toowoomba
    Posts
    21

    Default

    Thanks everyone for the advice. I will just use normal cable & if there is a problem later, then I can fix it.

  9. #8
    Join Date
    Sep 2014
    Location
    Australia
    Posts
    660

    Default

    I would not bother with the shielded stuff. I used unshielded on the CV and it does not cause any interference. My run is short and the cable length is only half a metre tops.

  10. #9
    Join Date
    Jan 2007
    Location
    Katoomba NSW
    Posts
    4,770

    Default

    Filters are used on the input side of the drive and prevent noise from being radiated via the power supply cables to other electrical equipment. Not usually a problem with such small drives.
    If RFI is a problem, the easiest things to do are to enclose the VFD in a metal cabinet and use a screened cable or a metal conduit from the VFD to the motor.
    As Bob said a small VFD at home may stuff up the radio reception or make your WIFI drop out in close proximity to the VFD but probably not much else.
    Any electronic controls you may have in other machinery will be enclosed in a metal case or protected from RFI in other ways.
    Those were the droids I was looking for.
    https://autoblastgates.com.au

  11. #10
    Join Date
    Jun 2005
    Location
    Helensburgh
    Posts
    7,696

    Default

    Mine was killing the neighbours' WiFi as well as ours, beyond that I have never had any feedback from other users during the time I was selling cyclones.
    CHRIS

  12. #11
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,757

    Default

    Quote Originally Posted by Chris Parks View Post
    Mine was killing the neighbours' WiFi as well as ours, beyond that I have never had any feedback from other users during the time I was selling cyclones.
    What is your shed construction material Chris?

  13. #12
    Join Date
    Jun 2005
    Location
    Helensburgh
    Posts
    7,696

    Default

    It is timber framed with Hardie Plank cladding and Cliplock roof and it is a lot further to neighbour's houses than a house usually is. The original VFD committed suicide for some reason a while ago so when I replaced it I put a filter in line as well and the problem went away.
    CHRIS

Similar Threads

  1. Powtran VFD Help Required
    By Chris Parks in forum DUST EXTRACTION
    Replies: 5
    Last Post: 10th October 2016, 05:53 PM
  2. Powtran VFD
    By thorens in forum METALWORK FORUM
    Replies: 14
    Last Post: 7th August 2015, 10:16 PM
  3. Shielded VFD Cable available
    By phomann in forum CNC Machines
    Replies: 0
    Last Post: 7th April 2013, 10:15 AM
  4. Replies: 9
    Last Post: 1st September 2012, 01:00 PM
  5. shielded power cable
    By rkreim in forum HI FI EQUIPMENT
    Replies: 15
    Last Post: 7th February 2007, 12:00 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •