1 1. Three non-inductive resistances, each of 100 Q, are connected in star to a three-phase, abc-sequence, 440-V supply. Three inductive coils, each of reactance100 Q connected in delta are also connected to the supply. Three wattmetersare connected as in Example 2.1.18. Calculate the reading indicated by eachwattmeter. 8:13Module 2 Unit 1 Anal...Q, = V3E¸I¸ sin 0̟= V3WEXAMPLE 2.1.18Calculate the average power indicated by each wattmeter and the total powerconsumed by the load. Phase sequence is EAB-EBc-ECA. Line-to-line voltage is 100 V.leellAaw,-j10nj102llbW2lellW3Property of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by anymeans, electronic, mechanical, photocopying, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited.237MODULE 2Polyphase CircuitsSolutionW = EI, cos 0W, = EI, cos 0̟/w Ea and IIN E and IW, = E I cos 0IN Ea and IeUsing Ean as the reference phasor, the phase voltages are:E =10020° v100E2 - 120° V100E, =Z120° vThe line voltages are:E = 100230° vE = 1002 - 90° vE, = 1002150° vBy nodal method, we determine the line currents.Aa-j10nBj102llbN► 102Property of and for the exclusive use of SLU. Reproduction, storing in a retrieval system, distributing, uploading or posting online, or transmitting in any form or by anymeans, electronic, mechanical, photocopying, recording, or otherwise of any part of this document, without the prior written permission of SLU, is strictly prohibited.238NERSIT

Given,Three non-inductive resistances are connected in star to a three- phase, abc-sequence.andThree…

1. Three non-inductive resistances, each of 100 Q, are connected in star to a three- phase, abc-sequence, 440-V supply. Three inductive coils, each of reactance 100 Q connected in delta are also connected to the supply. Three wattmeters are connected as in Example 2.1.18. Calculate the reading indicated by each wattmeter.