. Journal of electricity, power, and gas . thecurrent coils. P, and that the currents set up by thecurrent coils flow past the pole of the potential currents set up in the disc are in phase with thevoltages producing them, since the circuit offered bythe disc itself is non-inductive. The voltages in the discwhich produce these currents, however, lag 90 degreesbehind the fluxes set up by the coils on the stationaryelement, as an induced voltage is always 90 degreesbehind the inducing flux. The flux is in phase with thecurrent which produces it, the angle of hysteretic lagbeing neglig
. Journal of electricity, power, and gas . thecurrent coils. P, and that the currents set up by thecurrent coils flow past the pole of the potential currents set up in the disc are in phase with thevoltages producing them, since the circuit offered bythe disc itself is non-inductive. The voltages in the discwhich produce these currents, however, lag 90 degreesbehind the fluxes set up by the coils on the stationaryelement, as an induced voltage is always 90 degreesbehind the inducing flux. The flux is in phase with thecurrent which produces it, the angle of hysteretic lagbeing negligible, so that we have currents flowing inthe disc lagging 90 degrees behind the currents flowingin the meter windings. The potential coil is wound with many turns offine wire, and is therefore highly inductive, so that thecurrent flowing in this coil is practically 90 degrees be-hind the impressed , and the flux from the poleof the potential coil is brought to exactly 90 degreesbehind the impressed by use of the lagging coil,. as will be explained later. The flux from the poles ofthe current coils will be in phase with the current, andtherefore in the case of a load of unity power factorwill be in phase with the impressed It can bereadil} seen from this that in the case of unity powerfactor the current set up in the disc by the potentialcoil (which lags 90 degrees behind the flux from thepotential coil), will be in phase with the flux from thecurrent coils, and also that the current set up in thedisc by the current coils will be in phase with the fluxfrom the potential coil. It will further be seen byreferring to Fig. 1(1 that the disc currents set up bythe potential coil will flow past the center of the cur-rent coil poles, and that the disc current set up by thecurrent coils will flow past the center of the potentialcoil pole. This will gi\-e rise to a mechanical forcetending to cause the- disc tu re\(il\e, since any con-ductor carrying current at right ang
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Keywords: ., bookcentury1800, bookdecade1890, bookidjo, booksubjectelectricity
