1 4 4

: LED

  1. #1

    Dec 2007
    Thessaloniki, , Greece.
    :
    35

    LED



    ,

    (150cm 58w).

    LED Watt. :
    - 60cm -> 18w -> 10w LED
    - 120cm -> 36w -> 18w LED
    - 150cm -> 58w -> 22w LED

    (LED) ballast.

    .

    .

    40 58w . 40*58/230*1,8= 18.2 A .

    1,8 ballast ( ?).

    ballast ?

    .

    60% 7,5A.

    ?

    .
    Last edited by Jungle_Groove; 27-01-2014 at 21:21:31.
    <div align=\"right\">A</div id=\"right\">

  2. #2
    monachus's Avatar
    May 2001
    :
    2,950
    Blog Entries
    1
    P = V x I x cos()

    P = (W)
    V = = 230V
    I = A
    cos() .

    ballast, cos() = 95 (~), (40x58)/(230*0.95) = 10.61A

    40x22 / 230 = 3,82A ( 1 led).

    , cos() 0,55 (!) (40x58)/(230x0,55) = 18,33A,

    ( ) " " , 0,55 = 1/0,55 , , , .

    , 60%, .
    " .
    , ."

    St Francis of Assisi

  3. #3

    Dec 2007
    Thessaloniki, , Greece.
    :
    35
    K,

    .

    4 , 2 ballast 58w .
    3,94.

    8 LED 22w . 0,88 (!). 75%!

    . .

    .
    <div align=\"right\">A</div id=\"right\">

  4. #4
    monachus's Avatar
    May 2001
    :
    2,950
    Blog Entries
    1


    cos() 95 , .

    .

    feedback.
    " .
    , ."

    St Francis of Assisi

  1. .
    skiace .
    : 54
    : 25-09-2012, 10:52:10
  2. altkon .
    : 20
    : 18-02-2011, 16:03:02
  3. apostan
    : 6
    : 24-01-2010, 02:02:03
  4. .
    GFON .
    : 23
    : 13-04-2006, 12:41:45
  5. abc9510gr
    : 3
    : 27-02-2006, 11:26:43

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