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Sine wave

Discussion in 'Home Power and Microgeneration' started by mark Ransley, Oct 10, 2003.

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  1. mark Ransley

    mark Ransley Guest

    I have a generator 7500 generac. How do i check sign wave, what do i
    need, What is sign wave and what is good sign and how can it damage
  2. Zathera

    Zathera Guest

    Do look at the sine wave your going to need an oscilloscope. That is really
    not necessary for the average guy. Because the sine wave looks different
    during different loads and situations.

    Get a meter (volt, ohm meter some times called a Vom) that reads hertz and
    set the gen set with 20-50% load to 60 hz and you will be fine assuming that
    your on North America. Europe is mostly 50hz. This will be done with the
    speed governer, check your manual for exactly how.

    If the cycles are not close to what the electronics need then they can draw
    more power. Clocks and items with clocks do not like hertz other that want
    they expect.
  3. A VOM will not set the frequency. An oscilloscope or frequency meter is
    required. If you calibrate the oscilloscope the frequency can be measured by
    the time period (on the horizontal axis). A time period is 1/F or 1/60 = 16.6

    On another subject anybody know how to test the system board on a Generac
    Generator ?


    Howard Epstein
  4. mark Ransley

    mark Ransley Guest

    A -- Kill A Watt -- , will ,, at radioshack, a monitoring devise of
    total kwa , hrs , watts etc in memory, made to figure
    appliance consumption. per month or longer
  5. Steve Spence

    Steve Spence Guest

    AC producing rotary generators produce sine wave of a certain frequency.
    that frequency is determined by rpm. you will need a frequency counter to
    tell if your governor is holding the generator at the correct frequency. The
    poles of the generator determine the speed that the engine needs to run at
    to provide a certain frequency. Most common are 2 pole and 4 pole. In the
    USA, it's 60hz (3600 or 1800 rpm), in many other countries it's 50hz (3000
    or 1500).

    Some inverters produce a modified square wave that approximates sine wave,
    others produce a square wave that can cause havoc with motors and some
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