A specimen is tested for insulation resistance by the loss of charge method bydischarging a capacitor C=17 nF through it. The specimen capacitance is 3.4 nF. It isobserved that after charging the voltage falls from 260 V to 170 V in one minute. If thevoltmeter used has a resistance of 10 G2, and if the voltmeter was connected for onlythe last 10 seconds of the minute, answer the following:Determine the insulator resistance.Oa. 9.83 GOOb. 7.83 GnOc. 8.83 GOOd. 6.83 GNIf only conduction losses occur, find the operating frequency to obtain a complexrelative permittivity of e*-4.1-J0.0002Oa. 120.63 HzOb. 124.63 HzOc. 122.63 HzOd. 118.63 HzEE Committeeحلة الهندسة الكهربائية

To find specimen is tested for insulation resistance R and Capacitor C=17nF Cspecimen=3.4nF Initial…

Answered: A specimen is tested for insulation…

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter20: Capacitance In Ac Circuits

Section: Chapter Questions

Problem 2PA: You are working in an industrial plant. You have been instructed to double the capacitance connected...

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Similar questions

You find that a 25-F capacitor connected to 480 VAC is defective. The storeroom has no capacitors with a 480-VAC rating. However, you find two capacitors rated at 50 F and 370 VAC. Can these two capacitors be connected in such a manner that they can replace the defective capacitor? If yes, explain how they are connected and why the capacitors will not be damaged by the lower voltage rating. If no, explain why they cannot be used without damaging the capacitor.
You are working in an industrial plant. You have been instructed to double the capacitance connected to a machine. The markings on the capacitor, however, are not visible. The capacitor is connected to 560 volts and an ammeter indicates a current of 6 amperes flowing to the capacitor. What size capacitor should be connected in parallel with the existing capacitor? What is the minimum AC voltage rating of the new capacitor? What is the minimum DC voltage rating of the new capacitor? What is the minimum KVAR size that can be used in this installation?
You are a journeyman electrician working in an industrial plant. Your task is to connect an inductor to a 480-V, 60-Hz line. To determine the proper conductor and fuse size for this installation, you need to know the amount of current the inductor will draw from the line. The nameplate on the inductor indicates that it has an inductance of 0.1 H. An ohmmeter reveals that it has a wire resistance of 10 . How much current should this inductor draw when connected to the line?
A 15-F AC capacitor is connected in series with a 50 resistor. The capacitor has a voltage rating of 600 WVDC. The capacitor and resistor are connected to a 480-V, 60-Hz circuit. Is the voltage rating of the capacitor sufficient for this connection?
Three capacitors having capacitance values of 20F,40F, and 50F are connected in parallel to a 60 - Hz power line. An ammeter indicates a circuit current of 8.6 amperes. How much current is flowing through the 40F capacitor?
Three 20uF capacitors are connected in series with each other. A 1k ohm resistor and an LED connected in series to each other as well, but branched in parallel to all three capacitors. How long would the LED stay lit after power is removed? What current would flow through it during the charge cycle if VT=9v?
Calculate the voltage across the capacitor in the circuit in the figure and plot the charging curve on the graph.
1. 1-5 K 30v a. what is tue T CTime constant) ? b. How long will it take for the capacutor TO rtach s0% op charge? C. What is tne voltage of capa citor apter 1 seconds? d. How many tíme constants will it take for the soltage to reach 23 v? C. Gweng that the capacitor is fully changed, how will it take por it to be 20% ? long 120v + BF what is the. T ? b. what is the voltage capacitor apter 10 sec? a. C. How many time constants will it take for Tue Vo Itage to reach 80 v.? d. Given that the capaator is Fully charged, how time constants will it be to reau many GOV!
Web/Home F4 Search F8 F9 c) Some capacitors are marked 45micro farad save working voltage 25V. On a circuit diagram show how a number of these capacitors may be connected to show a capacitor of capacitance; 45 micro farads safe working voltage of 50 volts. 75 micro farads safe working voltage of 25 volts. 1. I.
What is the value of the induced voltage of the self-inductance when the rate of current is from 200 uA to 20 uA and the total time interval is 5 uS?
C) A 25 A electrodynamic ammeter is controlled by a spring having a constant of 5.7295x 10-6 Nm/rad. The full scale deflection is 110°. Determine the inductance of the instrument while measuring a current of 20 A. The mutual inductance at 0° deflection is 4 u H and the change in mutual inductance is linear with the deflection.
A capacitor of 1µF is charged to 100 volts and then disconnected from the power supply. A second but uncharged capacitor of 3µF is then connected across the first capacitor. What is the voltage across the parallel combination? O a. 110 volts O b. 45 volts O c. 66 volts O d. 25 volts

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