close
    what are elecrtic power measurments and the ratio between them

    0  Views: 150 Answers: 1 Posted: 9 years ago

    1 Answer

    Power is an expression of an amount of work, or energy transferred, in a unit of time. Power itself is not directly measured, but instead can be calculated using a number of formulas that use other values that are directly measured. The result of these calculations is expressed in energy units divided by time units, the international standard unit of power being the Watt. Horsepower is often used to express power in the U.S.

    Difficulty:
    Moderate

    Instructions

    1.
    * 1

    Record the value for the current in Amperes, and call this value "A."
    * 2

    Record the value for the voltage in Volts, and call this value "V."
    * 3

    Record the value for the efficiency as a decimal and call this value "E."
    * 4

    Substitute the values into the following equation that yields power as its result.
    P = V * A * E
    * 5

    For example, for a motor that operates at 85% efficiency, and runs at 220 volts with a current of 30 amperes, the equation would be as follows:
    P = 220*30*.85 = 5610 Watts

    References

    * Motor formulas

    Resources

    * How to Calculate Power

    * Print
    * Email
    * Share

    Read Next Article
    Comments

    * Print
    * Email
    * Share

    Related Ads
    Related Articles & Videos

    *
    How to Measure a Lens Magnification
    *
    How to Measure UHF Antenna Output Power
    *
    How to Calculate Decibels
    *
    How to Measure Power Using an Ammeter
    *
    What Does the Torque Rating on Small Engines Mean?
    *
    How to Measure Electric Energy
    *
    How to Convert Thrust to HP
    *
    How to Calculate Footcandles
    *
    How to Calculate Noise Power
    *
    How to Estimate the Power of a Generator


    Read more: How is Power Measured? | eHow.com http://www.ehow.com/how_5317728_power-measured.html#ixzz1LmOKuWJR


    Top contributors in Uncategorized category

     
    ROMOS
    Answers: 18066 / Questions: 153
    Karma: 1101K
     
    Colleen
    Answers: 47274 / Questions: 115
    Karma: 953K
     
    country bumpkin
    Answers: 11317 / Questions: 160
    Karma: 838K
     
    Benthere
    Answers: 2380 / Questions: 30
    Karma: 759K
    > Top contributors chart

    Unanswered Questions

    446092
    questions
    716543
    answers
    655713
    users