Power Factor Meter Working Principle

The power factor of a circuit can be found out from the wattmeter reading and voltmeter and ammeter readings suitably connected in the circuit.   Power factor = Wattmeter reading / (Voltmeter reading x ammeter reading).   Power factor = Read more…

• 8
•
•
•
•
•

Earth Tester Working Principle

Hi friends, in this article, I am going to describe the earth tester working principle and method of earth resistance measurement by it. I hope you will find it informative and helpful.   The Resistance of the earth can be Read more…

Megger Working Principle

The megger insulation tester is an instrument used for measuring high resistances of the order of mega ohms and for testing the insulation resistance.   Megger Working Principle   Megger working principle is based on the working principle of moving Read more…

Analog Multimeter Working Principle

An analog multimeter is the most commonly used instrument by technicians and engineers in the laboratory as well as other repair works. As it is clear from the name of this instrument, it can make many (multi) measurements with reasonable Read more…

Dynamometer Type Wattmeter Working Principle

Hi friends, in this article, I am discussing about dynamometer type wattmeter working principle and related information, if you are interested in it then you at the right place.   These are basically moving coil instruments. In these instruments, the Read more…

Range Extension of Ammeters | Voltmeters

There is no fundamental difference in the operating principles of ammeters and voltmeters. Both are current operated devices (except electrostatic type voltmeters) i.e. deflecting torque is produced when current flows through their operating coils.   In an ammeter, the deflecting Read more…

Moving Coil Instrument Working Principle

Hi friends, in this article, I am going to discuss about moving coil instrument working principle and other related information. You will appreciate my effort, I hope so.   The simple view of construction of moving coil instrument is shown Read more…

MI | Moving Iron Instrument Working Principle

Hi friends, in this article, I am discussing about moving iron instruments working principle and other necessary related information. If you are interested in it, keep reading.   The moving iron instruments or MI instruments are quite cheap in cost, Read more…

Deflecting | Controlling | Damping Torque

In order to ensure proper operation of indicating instruments, the following three torques are required: Deflecting torque. Controlling torque. Damping torque. What is deflecting torque in measuring instruments?   One important requirement in indicating instruments is the arrangement for producing Read more…

No Load Test of Induction Motor

The no load test and the blocked rotor test are two main induction motor tests, which are performed on induction motor to know the different losses, power factor and efficiency of the induction motor.   No Load Test of Induction Read more…