Q4)A:Draw schematic diagram for protection of delta -star power transformer for internal LG faultin the winding of transformer.

Answered: Q4) A:Draw schematic diagram for…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...

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Three-phase, 50 Hz 34500/10500 /Y connected transformer single-phase visible on the high voltage (primary) windings side Equivalent circuit parameters are given below. Each of the low voltage (secondary) windings of this transformer When a 7.5 ohm star connected resistive load is connected and the rated voltage is applied to the high voltage windings Find the transformer efficiency. Total iron losses of three phases will be taken as 85000 W.
Quesion 2. Draw an open-delta transformer bank circuit diagram and identify the requirements of open delta transformer.
What happened to 3-phase delta configuration of transformer when any one of the phases is opened due to the fault. Also, explain a brief operation along with the appropriate phasor diagram. Draw the phasor diagram along with the connection for Dd6 and Ydi
Choose the correct answer 1)Arching is caused by switching: a) Capacitive loads; b) Inductive loads; c) Resistive loads; d) Mechanical loads
I need the answer as soon as possible
Q3) What are the elements finding from no-load test of single phase transformer? Q4) Why Transformer Rating in kVA? Q5) How can eddy current loss be minimized?
63/ Choose the incorrect statement of a no load single phase transformer from the following a. The primary induced emf (E1) is in phase with the secondary induced emf (E2) b. The no load current (Io) leads the core loss component of no load current (Ic) c. The no load current (Io) lags the core loss component of no load current (Ic) d. The secondary induced emf (E2) lags the magnetic flux by 90 degree
Select the correct statement for step down transformer. a. Primary number turns = Secondary number turns b. Primary number turns Secondary number turns d. Secondary number turns = 0
Write in Briefly about circuit breaker, current transformer and voltage transformer
A 36/240 V phase transformer, belonging to a phase measured from the no-load (idle) run and short-circuit test. values are given in the table below. High voltage by applying rated voltage to the low voltage winding (The winding ends were left unloaded and the results of the no-load test results were obtained. By applying nominal current to the high voltage windings, the low voltage windings were short-circuited, and the results of the short circuit test were obtained. In direct current test 1 V direct voltage is applied to the low voltage winding, and the transformer draws 500 A direct current. All equivalent Calculate the circuit elements as moved to the low voltage side. Idle run test: Voltage : 36V Power : 68W Current : 2,8A Short circuit test: Voltage : 15V Power : 325W Current : 42,2A
Choose the correct answer from the given alternative: 1. In an ideal transformer, (a) windings have no resistance (c) core has no losses (b) core has infinite permeability (d) all of the above. 2. The primary and secondary induced e.m.fs. El and E2 in a two-winding transformer are always: (a) equal in magnitude (b) in-phase with each other (c) antiphase with each other (d) determined by load on transformer secondary. 3. In relation to a transformer, the ratio 20: 1 indicates that (a) there are 20 turns on primary one turn on secondary (b) secondary voltage is 1/20th of primary voltage (c) primary current is 20 times greater than the secondary current. (d) for every 20 turns on primary, there is one turn on secondary. 4. A transformer has negative voltage regulation when its load power factor is: (a) zero (b) lagging. (d) unity (c) leading 5. During short-circuit test, the iron loss of a transformer is negligible because: (a) the entire input is just sufficient to meet Cu losses only…
Calculate the iron loss and copper losses of each transformer for full load condition in back to back test on two similar single phase transformer?

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Q4) A:Draw schematic diagram for protection of delta -star power transformer for internal LG fault in the winding of transformer.