Construction and working of wattmeter pdf

The following figure shows the dynamometer wattmeter for measuring the power. If one uses one kilowatt in onehour duration, one unit of energy gets consumed. Before we study the internal construction of electrodynamometer type wattmeter, it is essential to know the working principle of electrodynamometer type wattmeter. If you dont see any interesting for you, use our search form on bottom v. Dynamometer type wattmeter works on very simple principle and this principle can be stated as when any current carrying conductor is placed inside. So we can say that the deflecting torque is directly proportional to the power delivered to the load. If two coils are connected such that, current proportional to the load voltage, flows through one coil and current proportional to the load current, flows through another coil, the meter can be calibrated directly in watts.

The other coil which is known as voltage coil, is wound from fine gauge wire. Dynamometer type wattmeter electrical technology s. The two coils are connected in different circuits for measurement of power. Their working depends on the theory that the current carrying conductor placed in a magnetic field experiences a mechanical force. One coil is fixed and is made in two identical parts. Explain in detail about construction woking of single. So energy meters measure the rapid voltage and currents, calculate their product and give instantaneous power. These instruments are similar in design and construction to electrodynamometer type ammeters and voltmeters. Dynamometer type wattmeter and its deflecting torque. The fixed coils, therefore, form the current coil or simply cc of the wattmeter. The instrument whose working depends on the reaction between the magnetic field of moving and fixed coils is known as the electrodynamometer wattmeter. As shown in the above figure, the wattmeter has two sets of coils. The wattmeter measures the electricity used in terms of the number of watts used. The basic unit of power is watts and it is measured by using a watt meter.

This power is integrated over a time interval, which gives the energy utilized over that time period. The current coil is connected in series with the load, carries the load current and the potential coil, connected in parallel with the load, carries the current proportional to the voltage across the load. Dynamometer type wattmeter working your electrical guide. Construction of dynamometer type wattmeter, dynamometer type wattmeter working. Electrodynamometer type wattmeter working principle. The series coils measure current flowing through the. It presents a detailed construction steps followed to achieve this feat. The product of current and voltage directly gives power, in the case of the dc measurement by dynamometer type wattmeter. To use it, plug it into an outlet, then plug in your electrical device into the wattmeter. The dynamometer wattmeter works on the motor principle. Wattmeter is an electric instrument which is used to measure the electric power of various electric circuits. Dynamometer type wattmeter construction and working. The movement of the needle is the result of a vector product between the magnetic fields of two coils, one carries the voltage and one carries the load current, producing a torque. We will discuss electrodynamometer type wattmeter working principle and its construction.

Wattmeter working principle construction types of wattmeter. Construction and working principle of energy meter duration. The wattmeter consists of a movable coil arranged between a pair of fixed coils in the form of a solenoid. When power is to be measured in a circuit, the wattmeter is connected in the circuit. One of the coil is in series and the other is connected in parallel. This mechanical force deflects the pointer which is mounted on the calibrated scale.

Since the induction phenomenon can only happen in the alternating current system, this instrument only measures ac power. Induction type wattmeter or simply induction wattmeter belongs to the family of induction type measuring instrument. A wattmeter is an instrument used to measure electrical power consumed i. The working principle of the electrodynamometer wattmeter is very simple and easy. Induction type wattmeter construction working and torque. Types of energy meters and their working principles elprocus. Dynamometer type wattmeter electrical technology youtube.