Results 1 to 5 of 5
  1. #1
    Join Date
    Sep 2008
    Location
    india
    Age
    39
    Posts
    15
    Rep Power
    0

    About Heat Load of electrical Componant in air Conditioning



    Can Any one Suggest me What data is required to calculate Control Panel heat Rejection

    The Custmer says that the panels are of 2000Amps rating .

    Please guide me?



  2. #2
    Join Date
    May 2007
    Location
    Auckland
    Age
    74
    Posts
    3,362
    Rep Power
    37

    Re: About Heat Load of electrical Componant in air Conditioning

    Start with the control circuit power supply rating, example if control circuit in control panel is rated at 10 amps and draws around 8.00 amps. That is the power/ heat input to control panel. A ventilation fan usually is sufficient.

  3. #3
    Join Date
    Jul 2006
    Location
    USA
    Age
    73
    Posts
    867
    Rep Power
    26

    Re: About Heat Load of electrical Componant in air Conditioning

    This is a interesting problem. I must confess I have no idea.
    The heat generated by a panel varies according to the load. Under different load conditions the panel will generate a different amount of heat, The 2000 Amp capacity rating is of no direct significance.
    I goggled "heat load electrical panel" and found some interesting articles. Let us know if you find a good answer.

  4. #4
    TRASH101's Avatar
    TRASH101 is offline Veteran Poster I am starting to push the Mods: of RE
    Join Date
    Mar 2007
    Location
    england
    Posts
    397
    Rep Power
    18

    Re: About Heat Load of electrical Componant in air Conditioning

    Sagar your question depends on a great many things namely the maximum theoretical power consumption of the sum of the installed components within the panel. i.e. all the coils on the contactors and relays, transformers and then the big stuff ----- Any thyristors or invertors ((in fact anything that isn't a terminal block or a fuse)and even they and the wire could be argued)

    In real terms the following applies Total power in - Total power out = power dissipated by control panel

    Then you need to identify the maximum, min and ideal panel temperatures, then the a max and min for ambient, then the max figure for your ventilation volume and then you can think about rejecting the heat.
    Quidvis Recte Factum Quamvis Humile Praeclarum.

    Latine dictum, sit altum videtur.

    Si hoc comprehendere potes, gratias age magistro Latinae.

  5. #5
    Join Date
    Sep 2003
    Location
    ISRAEL
    Age
    72
    Posts
    4,266
    Rep Power
    46

    Re: About Heat Load of electrical Componant in air Conditioning

    If all is OK inside the cabinet, then only the contactors coils produce heat, about 10 watt per coil.
    In reality, there are always loose contacts and bad fuses, under size over loads.

    The companies that make electric boards coolers do not have so many models to chose from, so I think that the size of the cabinet is the main factor.
    Beware of using window ac unit cause it will cool the components inside under DPT and the moisture can be very dangerous.
    The temp inside should not be under 20°C.

Posting Permissions

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