Assuming a secondary system consisting of step down distribution transformer (DT) with line to line input output voltages 20KV - 380V respectively (220V line-neutral). Two low voltage electric motors M1 (single phase with S1=15KVA and PF1=0.8 lag) and M2 (three phase- balanced with S2=30KVA and PF2=0.8 lag) are fed directly from the secondary main and located at distances from the DT as shown in the figure. Assuming that the secondary feeder main has R=0.50/km and X=0.20/km.

Assuming a secondary system consisting of step down distribution transformer (DT) with line to line input output voltages 20KV - 380V respectively (220V line-neutral). Two low voltage electric motors M1 (single phase with S1=15KVA and PF1=0.8 lag) and M2 (three phase- balanced with S2=30KVA and PF2=0.8 lag) are fed directly from the secondary main and located at distances from the DT as shown in the figure. Assuming that the secondary feeder main has R=0.50/km and X=0.20/km.

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...

See similar textbooks

Similar questions

Two transformers A and B of ratings 500 KVA and 250 KVA are supplying a load KVA of 750 at e.8 Pflagging, their open circuit voltages are 400 volt and 410 volt respectively. Transformer A has 1% resistance and 5% reactance and transformer B has 1.5% resistance and 4% reactance. Find ( a ) Cross - current in the secondaries on no - load , ( b ) the load shared by each transformer .
A single phase 9.6 kVA, 500 V / 1.5 kV transformer has an impedance of 1.302 Ω with respect to primary side. and secondary sides. Find its per-unit impedance with respect to primary side only a. 0.02 b. 0.03 c. 0.04 d. 0.05
Two transformers are to be operated in parallel such that they share load in proportion to their KVA rating. The rating of the first transformer is 500 kVA and its pu leakage impedance is 0.05 pu. If the rating of second transformer is 250 kVA, then its pu leakage impedance is A 0.20 B 0.10 C 0.05 D 0.025
3) A three-phase transformer of 60 kVA (three-phase power), 13200/480 V (line A line) in delta-strella connection has a resistance of 0.02 PU and a reactance of 0.08 PU. For this transformer, calculate: a) The voltage regulation at full load and F.P. 0.85 in delay. (b) The regulation of voltage voltage to full cargo and F.P. Unitarian. c) The voltage regulation at full load and F.P. 0.85 in advance.
A 120 kVA, 1350/330 V single phase transformer has the following parameters: R1 = 0.34 Q, X1 = 0.59 0, R2 = 0.014 Q, X1 = 0.029 Q, Rc = 380 and Xm = 320 Q. The no load current is 4.7 A at a power factor of 0.36 lagging and the no load losses are 4.6 kW. For a full load and 0.9 power factor lagging with 300 V load terminal voltage, determine (a) equivalent circuit parameters referred to primary side, (b) percentage regulation and (c) full load efficiency. O:01 AM
Ql-phase step down transformer 1250 KVA, 11000/2200 V, 50 Hz . The resistance /phase and leakage reactance/phase of the primary winding are 0.78 N and 4.80 and the corresponding values for the secondary winding are 0.012 and 0.062 respectively if the primary winding is connected in delta and secondary in star calculate: i)The voltage to be applied at normal frequency to the primary to circulate full-load through it when the secondary is short-circuited Ii) The full load copper loss
Q/A single-phase transformer with a capacity of 100 kVA and a voltage of 2000/400 and the equivalent circuit elements are: As follows R1 = 0.1 02 x1 = 0.2 2 R2 = 0.25 2 X2 = 0.75 2 RO = 500 XO = 150 Q and feeds a load of 90 kVA at a voltage of 2000 volts and a power factor of 8.0 in delay. Calculate voltage and current Primary Royl ww JX eql
4. 100 kVA, 6800-240 V, 50 Hz single phase step down transformer has the following parameters: RLs-0.008Ω RHs-2.6Ω Ri-HS-500 0Ω XLS-0.015Ω XHs=5.22 Xm,HS=88002 Transformer is delivering 80% of rated load at rated voltage and 0.95 lagging power factor. Determine the following: a) The equivalent impedance of the transformer referred to primary. b) Input impedance of the combined transformer and load. c) Actual input voltage at HV side. d) Input impedance if load is disconnected. e) Exciting current at no load.
a 50kVa, 11.5kV/2.3kV, two-widing transformer is to be connected as an autotransformer having an input voltage of 13.8 kV and an output voltage of 11.5kV. a) determine the current in the common winding in amperes. b) determine the new kVa rating as an autotransformer. c) Determine the power inductivity transferred in kVa. d)determine the power conductivity transfer in kVa. BOX THE FINAL ANSWER AND USE 4-5 DECIMAL PLACES FOR THE ANSWER subject: ELECTRICAL APPARATUS AND DEVICES
It is bartleybe's policy that if questions objective than you need to solve at least first 3 questions.