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The pursuit of kVARh Metering, dates back to about 1915 and kVAh metering to about 1935. A lot of ground has been covered on these complex topics. However, it is only since the 1990’s that digital signal processing improvements have led to working meters implementing the principles proposed then. Exhaustive computer simulations have also helped polish some rough edges of the original work. This paper explains the properties of kVAh for metering and SUitability for applications.
Metering system