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If the resistors of star connected system are ZR, ZY, ZB then the impedanceZRY in delta connected system will be?(a) (ZRZY + ZYZB + ZBZR)/ZB(b) (ZRZY + ZYZB + ZBZR)/ZY(c) (ZRZY + ZYZB + ZBZR)/ZR(d) (ZRZY + ZYZB + ZBZR)/(ZR+ZY)This question was addressed to me during a job interview.The query is from Star to Delta and Delta to Star Transformation in division Polyphase Circuits of Network Theory |
Answer» RIGHT OPTION is (a) (ZRZY + ZYZB + ZBZR)/ZB The explanation is: After transformation to DELTA, the impedance ZRY in delta connected system will be (ZRZY + ZYZB + ZBZR)/ZB. |
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