Multiple Factor

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hi,

u must be talking about Multiplication Factor (MF) of Energy Meters. It is the factor with which one need to multiply the energy meter differential reading (Closing reading minus opening reading) to arrive at the actual energy consumption over a given period of time. This is required particularly if CTs (Current Transformers) are used to connect an energy meter. If meter manufacturer does not specify MF for his meter, the connected CT Ratio will become MF for that meter.

eg.: When a 5Amps. rated Energy Meter is connected to a circuit through use of a 100/5Amps. CT to measure the energy in a circuit that will be carrying a current upto 100Amps., 100/5=20 is the MF for that meter. So, to arrive at the actual energy consumed by the circuit over a given period of time the difference in meter readings is to be multiplied by 20.

Hope this is what your question is about.

Regards,

sitaram.

If only CT is used consider CT ratio as the multiplication factor as pointed out by Mr.Sitaram. If the energy meter pressure coil is powered by a potential transformer, then the multiplication factor will be ...

Energy meter multiplication factor = CT ratio X PT ratio

I would suggest you to go to the posting http://cr4.globalspec.com/thread/36700

You will get your answers.

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