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Reciprocal of impedence is know as

With the help of a schematic diagram explain how a overcurrent relay protects a line during short circuit fault.

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in Lesson 2 Generation, Transmission and Distribution of Electric Power an Overview by
With the help of a schematic diagram explain how a overcurrent relay protects a line during short circuit fault. 

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With the help of a neat circuit diagram explain the working principle of Digital to Analog converters.(DAC)

With the help of a neat circuit diagram explain the working principle of Digital to Analog converters.(DAC)

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With the help of suitable diagram, explain how humidity is measured with dry and wet bulb thermometer.

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Explain Center-tapped full wave rectifier with the help of circuit diagram and draw input output waveforms. 

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Explain full wave bridged rectifier with the help of circuit diagram and input output waveform.

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Explain with necessary diagram the earth fault protection of power and auxiliary circuit.

Explain with necessary diagram the earth fault protection of power and auxiliary circuit.

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To limit the short circuit current during fault conditions:

To limit the short circuit current during fault conditions: (1) Reactors are used (2) Capacitors are used (3) A coil of high inductive reactance as compared to its resistance is used (4) Both (a) and (c) 

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Explain concept of capacitive type proximity switch with neat schematic diagram.

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Explain with schematic diagram direct distribution of solar energy.

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With the help of neat diagram, explain the construction of current transformer. 

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Explain working of 'hot wire anemometer with the help of diagram. 

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With the help of neat diagram, explain the method to obtain unidirectional polarity in train lighting.

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What is solenoid valve ? Explain its working with the help of diagram.

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Explain the leakage flux and its effect with the help of neat diagram.

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Explain space vector transformation and space vector switching with the help of diagram. What are the advantages of SVM?

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Draw schematic diagram of welding transformer showing constructional features of a welding transformer. Also explain its working.

Draw schematic diagram of welding transformer showing constructional features of a welding transformer. Also explain its working.

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Draw a neat sketch of earth fault protection of auxiliary circuit of electric loco. State the function of relay and isolating resistance.

Draw a neat sketch of earth fault protection of auxiliary circuit of electric loco. State the function of relay and isolating resistance.

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In case of a 3-phase short-circuit fault in a system, the power fed into the system is

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Explain with circuit diagram operation of zener diode as a voltage regulator.

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During 3-phase short circuit on a unloaded alternator, the dc component may be zero in

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In the induction type directional over current relay, when a short-circuit occurs in the circuit

In the induction type directional over current relay, when a short-circuit occurs in the circuit (A) power flows in reverse direction (B) power flows in normal direction (C) directional power element does not operate (D) over current element is not energized

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The power in a 3phase circuit is measured with the help of 2 wattmeters. The reading of one of wattmeters is...

The power in a 3phase circuit is measured with the help of 2 wattmeters. The reading of one of wattmeters is positive and that of the others is negative. The magnitude of readings is different. It can be concluded that the power factor of the circuit is  (A) Unity (B) 2 (lagging) (C) 5 (lagging) (D) Less than 0.5 (lagging)

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The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and...

The magnitude of the open-circuit and short circuit input impedance of a transmission line are 100 ohm and 25 ohm respectively. The characteristic impedance of line is:  (1) 25 ohm (2) 50 ohm (3) 75 ohm (4) 100 ohm

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For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is

For a short transmission line with r/x ratio of is 1.0, the regulation will be zero when the load power factor is

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If the % reactance upto the fault point is 20%, then the short circuit current will be

If the % reactance upto the fault point is 20%, then the short circuit current will be

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In which fault the maximum short circuit current occurs?

In which fault the maximum short circuit current occurs?

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A lightening arrester connected between the line and earth in a power system protects the terminal equipment

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With the help of neat diagrams,explain the following methods of speed control in DC series motor. i) Field diverter method. ii) Armature diverter method.

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With the help of necessary sketch, explain in brief the working of brushless DC motor.

With the help of necessary sketch, explain in brief the working of brushless DC motor. 

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During short circuit test iron losses are negligible because?

During short circuit test iron losses are negligible because?

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State what is the significance of conducting phasing out test on a 3-phase transformer? Explain its procedure with a suitable connection diagram.

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Explain the construction and working of a photoelectric cell with a neat diagram. 

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Explain the hysteresis loop of a magnetic material with neat diagram.

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The ratio of air-gap line voltage from open-circuit characteristic and armature current from short-circuit

The ratio of air-gap line voltage from open-circuit characteristic and armature current from short-circuit characteristic for a particular value of the field current in a synchronous generator is (A) synchronous reactance (B) synchronous impedance (C) unsaturated synchronous reactance (D) unsaturated synchronous impedance 

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The steady-state fault current during a 3 phase terminal fault on a generator is limited by:

The steady-state fault current during a 3 phase terminal fault on a generator is limited by: (1) Transient reactance of the generator (2) Sub-transient reactance of the generator (3) Synchronous reactance of the generator (4) DC off—set during the instant of the fault

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Describe with neat circuit diagram the method of measurement of power in a High voltage, high current a.c circuit.

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For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic

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asked May 29, 2018 in Electric Power Transmission by Shimroz123
1 answer 29 views
If the fault current is 6000 A, the relay plug setting is 150% and the CT ratio is 400/5, the plug

If the fault current is 6000 A, the relay plug setting is 150% and the CT ratio is 400/5, the plug setting multiplier will be

asked May 8, 2018 in Switchgear And Protection by Shimroz123
1 answer 14 views
If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400:5, the plug setting multiplier will be

If the fault current is 2000 A, the relay setting is 50% and CT ratio is 400:5, the plug setting multiplier will be

asked Apr 29, 2018 in Power system by Shimroz123
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Explain the term self induced EMF with a neat diagram.

Explain the term self induced EMF with a neat diagram.

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Draw the circuit diagram of crystal oscillator and explain its working.

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Explain the construction of three phase induction motor with neat diagram.

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With neat diagram, explain the working of clip-on ammeter.

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Explain working of pressure switch with suitable diagram. State the function of differential setting in pressure switch.

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Explain the operation of pneumatic cylinder with neat diagram.

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Explain the basic operation of an oscilloscope with necessary diagram for each section in detail.

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What is watchdog timer ? Explain the implementation of time out for ATM with block diagram and program.

What is watchdog timer ? Explain the implementation of time out for ATM with block diagram and program.

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The zero sequence current of a generator for line to ground fault is j 2.4 p.u. The current through the neutral

The zero sequence current of a generator for line to ground fault is j 2.4 p.u. The current through the neutral during the fault is (a) j 0.8 p.u (b) j 2.4 p.u. (c) j 0.24 p.u. (d) j 7.2 p.u. 

asked May 25, 2018 in Power system by Shimroz123

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