Comparative tests of induction wattmeters . ype K. Shunt Loss = watts at 110 volts and 60 cycles per Jioss = watts at 10 amperes and 60 cycles/second. Deterrainatmon of Flux QuadratureAmperes Volts Watts Cos -9- .00442 89° 44 40. Si ??if: ? - ? &- COlIPARATIVE TESTS OF IlIDUCTICN The oblect of this thesis was to obtain ia set of datashowing the effect on various comTncrcial induction watt-meters of variation in force., temperature,freqa3ncy, end pov/er factor at vn,rici:s lords. This data was obtained or, five T-rlT knoi^vn ty
Comparative tests of induction wattmeters . ype K. Shunt Loss = watts at 110 volts and 60 cycles per Jioss = watts at 10 amperes and 60 cycles/second. Deterrainatmon of Flux QuadratureAmperes Volts Watts Cos -9- .00442 89° 44 40. Si ??if: ? - ? &- COlIPARATIVE TESTS OF IlIDUCTICN The oblect of this thesis was to obtain ia set of datashowing the effect on various comTncrcial induction watt-meters of variation in force., temperature,freqa3ncy, end pov/er factor at vn,rici:s lords. This data was obtained or, five T-rlT knoi^vn types, namejrFort Wayne, Types K and vi, Duncari Type A, V/estinghouseType C and Schaeffer Type E. The apparatus and method are best shovn by tine ,tin? blue-print. A 5 Lincoln, variable-speedmotor \ used to drive a F KV/. single phase Wood alter-nator. As the voltage obtained was only ^0 volts on noload, it had to be stepped up. For this purpose a F KV:. transforiTier was used, using the four secondary coilsas an anto-transformer. Two Thomson ammeters, (0 ~ ^)and (0 — TP) amperes, used i^o mie^.sure the current:two V/eston wattmeters, (0 - F^ and (0 - F)amperes capacity, were used to measure the true ratts;acomparativetests00sigw
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