State the use of Lux Meter and Tachometer in energy audit.

State the use of Lux Meter and Tachometer in energy audit.
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1 Answer

Answer :

Use of lux meter – to measure intensity of light

Use of tachometer – to measure speed
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State the function and shape of following parts used in induction type energy meter: i) Series magnet ii) Shunt magnet iii) Al disc iv) Brake magnet

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Which of the following is not a part of energy audit as per the Energy Conservation Act, 2001? a) monitoring and analysis of energy use b) verification of energy use c) submission of technical report with recommendations d) ensuring implementation of recommended measures followed by review

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Explain stepwise the “Detailed energy audit” procedure.

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Explain the “mitigation of power theft” and “faulty meter replacement” for energy conservation techniques to reduce commercial losses.

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Draw a block diagram of electronic energy meter. Write function of each block.

Description : Draw a block diagram of electronic energy meter. Write function of each block.

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Draw a neat sketch of 1-ph induction type energy meter and write operating principle of it.

Description : Draw a neat sketch of 1-ph induction type energy meter and write operating principle of it. 

Last Answer : Operating Principal:- The disc is placed between the two-flux due to pressure coil and flux due to current coil, which will set up torque on the disc which is proportional to power causing the ... is proportional to voltage, the second carries a current coil so its flux is proportional to current.

Draw and describe working of electronic energy meter.

Description : Draw and describe working of electronic energy meter.

Last Answer : working of electronic energy meter:- 1. CT reduces current to reasonable value for current scaling network. 2. Voltage & current scaling networks reduce proportionally the voltage & ... The ADC converts the square wave frequency analog output to display the energy in watthour. 

What is meant by energy meter constant?

Description : What is meant by energy meter constant?

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With neat diagram explain calibration of energy meter by direct loading method.

Description : With neat diagram explain calibration of energy meter by direct loading method.

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Why energy meter is integrating type measuring instrument?

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Write any two advantages of digital energy meter.

Description : Write any two advantages of digital energy meter.

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List any four errors in induction type energy meter. Give method of compensation for each.

Description : List any four errors in induction type energy meter. Give method of compensation for each.

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An induction type energy meter is found to run fast. Correction for this error can be made by

Description : An induction type energy meter is found to run fast. Correction for this error can be made by  (A) Over-load compensation. (B) Voltage compensation. (C) Moving the brake magnet away from the centre of the disc. (D) Moving the brake magnet towards the centre of the disc.

Last Answer : An induction type energy meter is found to run fast. Correction for this error can be made by Moving the brake magnet away from the centre of the disc.

A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω

Description : A 200 V, 5 A d.c. energy meter is tested at its marked ratings. The resistance of the pressure circuit is 8000 Ω and that of current coil is 0.1 Ω. The power consumed when testing the meter with phantom loading with current circuit excited by a 6 V battery is (A) 2.5 W (B) 5 W (C) 32.5 W (D) 35 W

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Phantom loading for testing of energy meter is used

Description : Phantom loading for testing of energy meter is used (A) to isolate the current and potential circuits (B) to increase power loss during testing (C) for meters having low current ratings (D) to test meters having a large current rating for which loads may not be available

Last Answer : B

The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is

Description : The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is (A) 1.2 kW (B) 1 kW (C) 600 W (D) 500 W

Last Answer : The disc of a single phase Induction-type energy meter makes 60 revolutions in 6 minutes. Meter Constant is 1200 rev/kWh. Power consumption in the load is 500 W