EPower Fo­cus

Smart en­ergy me­ters are now more tech­ni­cally ad­vanced

Electronics Bazaar - - Contents - By Baishakhi Dutta

En­ergy me­ters are avail­able in sin­gle phase and three phase ver­sions, at dif­fer­ent cur­rent rat­ings, as per the cus­tomer’s re­quire­ment. Of late, newly de­vel­oped elec­tronic en­ergy me­ters are also avail­able in the mar­ket. Since the tech­nol­ogy in­volved to man­u­fac­ture this prod­uct is fairly sim­ple and re­place­ment of spare parts is easy, the present de­mand and fu­ture prospects for this prod­uct are rea­son­ably good.

Types of en­ergy me­ters

There are three ba­sic types of en­ergy me­ters, as listed here.

• Elec­trome­chan­i­cal/stan­dard me­ters: These are the most com­mon type—the age old watt hour me­ters. They con­sist of a ro­tat­ing alu­minium disc mounted on a spin­dle be­tween two elec­tro-mag­nets, the ro­ta­tion speed of which is pro­por­tional to the power that is in­te­grated by the use of a counter mech­a­nism and gear trains.

• Elec­tronic me­ters: These are ac­cu­rate and highly pre­cise. They are avail­able as ana­logue or dig­i­tal mea­sur­ing in­stru­ments, and are more de­pend­able than con­ven­tional me­chan­i­cal me­ters. They con­sume less power and start mea­sur­ing

in­stan­ta­neously when con­nected to a load. An ana­logue me­ter con­verts power to a pro­por­tional fre­quency or pulse rate, and in­te­grates it through coun­ters placed in­side it. In a dig­i­tal elec­tronic me­ter, power is di­rectly mea­sured by a high-end pro­ces­sor. Dig­i­tal me­ters are straight­for­ward as all you need to do to take a read­ing is to note down the first five fig­ures on the dig­i­tal dis­play.

• Smart me­ters: These use ad­vanced me­ter­ing tech­nol­ogy, which in­volves plac­ing in­tel­li­gent me­ters that mea­sure en­ergy con­sump­tion, re­motely switch on the sup­ply to cus­tomers and even con­trol the max­i­mum elec­tric­ity con­sump­tion pos­si­ble, thus read­ing, pro­cess­ing and send­ing feed­back to users.

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