Mathcad - 05-24

Mathcad - 05-24 - = V prated 7200 V = Problem 5-24: kVAR kW...

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The transformer is rated 12.47 kV -- 120 V V x 120V = V x V srated = Since the low side is connected delta, the line voltage will be equal to the coil rating of each phase V h 12.471kV = V h 3 V hLN = The line voltage on the primary will the the square root of three times the line to neutral voltage, so V hLN 7.2kV = V hLN V prated = Since the high side is connected wye the line to neutral voltage will be equal to the coil rating of each phase b. H1 H2 X1 X2 Delta-Delta Connection H1 H2 X1 X2 H1 H2 X1 X2 A C B a b c a. Solution S rated 10 kVA = V srated 120 volt
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Unformatted text preview: = V prated 7200 V = Problem 5-24: kVAR kW kVA kW c. The total three phase power rating is simply three times the individual phase S rated3ph 3 S rated = S rated3ph 30kVA = d. The phase ratio is the ratio of the voltage ratings for one of the single-phase transformers that comprise the bank PR V prated V srated = PR 60 = The bank ratio is the ratio of the rated line voltages found in part b: BR V h V x = BR 103.923 =...
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Mathcad - 05-24 - = V prated 7200 V = Problem 5-24: kVAR kW...

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