composition of electronic watt-hour meter error.
structural features of electronic watt-hour meter.
The multiplier used in the hardware system of the increasingly widely used electronic watt-hour meter includes time division multiplier and AC/DC direct sampling multiplier.
The time division multiplier uses field effect transistor(FETs) to control amplitude modulation circuits,which easily suffers interference from the spike effect of FETs.
The production of a high-precision time division multiplier imposes quite high requirements on components and entails complicated auxiliary circuits and higher costs.
Complicated auxiliary circuts are generally not set for the electronic watt-hour meter which is largely used for civil purpose with low precision, so its anti-interference capability is rather weak.