Introductory Circuit Analysis (13th Edition)
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ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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The ohmic value of impedance to be connected in the neutral to ground circuit of a 2000 kVA transformer with Earth fault relay set to 40%, with respect to 400 V side calculate ohmic value of impedance?
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- What does 11kV mean in this question?arrow_forward3.Draw the connections for three (3) phase transformers configurations listed below using single phase transformers (use transformer can symbol. DO NOT USE WINDING REPRESENTSTION): a.Star/Star - using two (2) subtractive and one (1) additive transformers b.Star/Delta – using two (2) subtractive and one (1) additive transformers c.Delta/Delta – using subtractive transformers d.Delta/Star – using two (2) additive and one (1) subtractive transformers e.Edison/Delta - using two (2) subtractive and one (1) additive transformers f.Open/delta - using two (2) additive.arrow_forwardDescribe the process of fault current analysis in power systems and its significance in protecting electrical equipment from damage.arrow_forward
- 3.8. Three identical 9-MVA, 7.2-kV/4.16-kV, single-phase transformers are con- nected in wye on the high-voltage side and delta on the low voltage side. The equivalent series impedance of each transformer referred to the high-voltage side is 0.12 + j0.82 S per phase. The transformer supplies a balanced three- phase load of 18 MVA, 0.8 power factor lagging at 4.16 kV. Determine the line-to-line voltage at the high-voltage terminals of the transformer.arrow_forwardA 220-kVA transformer with .2% resistance and 4% reactance and another 120-kVA transformer with 3% reactance and .15% resistance with the same voltage ratio. the phase angle is 33 degree and the total load .25 MVA. How much the load of each transformer. what are the load currents of each transformer if a1 =20 and a2=25?arrow_forwardA 112.5 kva, 480v primary to 120/240v secondary, three-phase transformer with a 300 amp secondary overcurrent device will require at least _______ size secondary conductors a. 750 kcmil b. 300 kcmil c. 500 kcmil d. 350 kcmilarrow_forward
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