2. Table 1 gives the types and size of various loads that will be connected to a three-phase transformer. DEVICES Lamps 1 HP, 1ф Motor 10 HP, 30 Motor b) QUANTITY 20 10 5 VOLTS 120 120 240 AMPS/UNIT 1 9.8 3.5 Table 1 Determine the KVA capacity of the three-phase transformer required. Draw the connection the transformer connection and show how each load must be connected

2. Table 1 gives the types and size of various loads that will be connected to a three-phase transformer. DEVICES Lamps 1 HP, 1ф Motor 10 HP, 30 Motor b) QUANTITY 20 10 5 VOLTS 120 120 240 AMPS/UNIT 1 9.8 3.5 Table 1 Determine the KVA capacity of the three-phase transformer required. Draw the connection the transformer connection and show how each load must be connected

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter4: Symbols

Section: Chapter Questions

Problem 7SQ: The symbol shown is a(n) a. iron core transformer. b. auto transformer. c. current transformer. d....

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Similar questions

For a short-circuit test on a 2-winding transformer, with one winding shorted, can you apply the rated voltage on the other winding? (a) Yes (b) No
For the transformer in Problem 3.10. The open-circuit test with 11.5 kV applied results in a power input of 65 kW and a current of 30 A. Compute the values for GcandBm in siemens referred to the high-voltage winding. Compute the efficiency of the transformer for a load of 10 MW at 0.8 p.f. lagging at rated voltage.
A single-phase l0-kVA,2300/230-volt,60-Hz two-winding distribution transformer is connected as an autotransformer to step up the voltage from 2300 to 2530 volts (a) Draw a schematic diagram of this arrangement, showing all voltages and currents when delivering full load at rated voltage. (b) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the rated values as a two-winding transformer. How much of this kVA rating is transformed by magnetic induction? (C) The following data are obtained from tests carried out on the transformer when it is connected as a two-winding transformer: Open-circuit test with the low-voltage terminals excited: Applied voltage =230V, input current =0.45A, input power =70W. Short-circuit test with the high-voltage terminals excited: Applied voltage =120, input current =4.5A, input power =240W. Based on the data, compute the efficiency of the autotransformer corresponding to full load, rated voltage, and 0.8 power factor lagging. Comment on why the efficiency is higher as an autotransformer than as a two-winding transformer.
What is the purpose of a transformer? Draw the symbols for a transformer.
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Question 10 Not yet answered Marked out of Previous page BE The results from the DC test of a single phase transformer are: Vdc-14v and ldc 1.5A, the DC resistance are equal to: O a. O b. OC. O d. 12.50. 8.450 9.3302. 16.250. Time left 0:26:1 hp Next page
AC power of 100 volts and 1 ampere enters a transformer with 2 coils and exits the transformer with 20 coils. What is the exiting voltage and current? a.) 1000v/0.1amp b.) 0.1v/1000amp c.)1000v/1amp d.) 2v/20amp e.) No change
The core of a three phase, 60 Hz, 11000/750 V delta/star, 310 kVA, core-type transformer operates with a flux of 0.056 Wb. Find(i) number of H.V. and L.V. turns per phase.(ii) e.m.f. per turn(iii) full load H.V. and L.V. phase-currents
Explain the faults in transformer. Explain the construction and working principle of Buchhloz Relay
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A normal transformer has a nominal 60 kVA. The nominal primary and secondary voltages are 600 V and 120 V respectively. If this transformer is connected as an autotransformer at 600 Vac a-) What would be the output voltages available using different connections? b-) Calculate the load kVA that the transformer can supply for each of the output voltages. c-) Calculate the currents of the windings for each one of the output voltages, indicating if it exceeds the nominal values.
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