re disc of this meter constitutes thepressure element, and receives constantly from the trans-former a large alternating current I, proportional inamount to the line of pressure E but lagging Q8o° f (&- ^) Jbehind the latter* 6 is the angle of lag of the primary cup-rent of the transfornjer, ^… … Now the load current I which lags behind e produces aflux $ thru the magnet which varies with the value of thesaid current. Due to the iron core $ lags behind I by thehysteretic angle oc , whose value depends upon the magneticdensity and the quality of iron in the core. Since the current I passing…
Electric meters · Electricity · Watt-hour meter · Theses
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