The field of the voltage coil is delayed by 90 degrees using a lag coil. If we use one kilowatt in one hour, it is considered as one unit of energy consumed.
It is to be noted that the spring control and pointer of the watt-meter have been replaced in the energy meter by a brake magnet which provides braking torque as explained above. Mechanism of rotation of an aluminum disc which is made to rotate at a speed proportional to the power.
The aluminum disc is supported by a spindle which has a worm gear which drives the register. Some multiple tariff meters use different tariffs for different amounts of demand. The register is a series of dials which record the amount of energy used. Battery is provided for RTC and other significant peripherals for backup power.
They have high torque is to weight ratio as compared to other instruments. Another type of smart meter uses nonintrusive load monitoring to automatically determine the number and type of appliances in a residence, how much energy each uses and when.
This voltage coil has many turns and is arranged to be as highly inductive as possible. Thus the total no. However, modern tamper-resistant meters can detect and bill it at standard rates.
Analog Electronic Energy Induction type energy meter In analog type meters, voltage and current values of each phase are obtained by voltage divider and current transformers respectively which are directly connected to the load as shown in figure.
As you start consuming power the disk slowly starts rotating and the several rotation of the disk displays the power consumption, in the particular interval of time.
A typical arrangement is a peak occurring during the day non-holiday days onlysuch as from 1 pm to 9 pm Monday through Friday during the summer and from 6: It should be noted that with the dial pointer type, adjacent pointers generally rotate in opposite directions due to the gearing mechanism.
Digital Electronic Energy Meters Digital signal processor or high performance microprocessors are used in digital electric meters. Electromechanical induction type Energy meter Induction type Energy meter It is the popularly known and most common type of age old watt hour meter.
It consists of rotating aluminum disc mounted on a spindle between two electro magnets. Now let us look at the working operation of the single phase induction meter. The upper electromagnet is called shunt magnet and it carries a voltage coil consisting of many turns of thin wire.
The disk passes between the magnet gaps. By a suitable system, a train of reduction gears the pinion on the rotor shaft drives a series of five or six pointers.
As a result of interference of eddy currents and two magnetic fields constitute a deflecting torque in the disk. Since it is typically not cost effective to store significant amounts of electricity during a period of low demand for use during a period of high demand, costs will vary significantly depending on the time of day.
To make the phase angle between flux produced by shunt magnet and supply voltage aboutsmall adjustments in the place of the ring is required. Vertical spindle or shaft of the aluminum disc is connected to gear arrangement which records a number, proportional to the number of revolutions of the disc.
In analog meters, power is converted to proportional frequency or pulse rate and it is integrated by counters placed inside it. In order to reduce friction to greater extent floating shaft energy meter is used, the friction is reduced to greater extinct because the rotating disc which is made up of very light material like aluminium is not in contact with any of the surface.
The current flowin in the pressure coil is Ip which lags behind voltage by an angle of 90 degrees. The dials may be of the cyclometer type, an odometer-like display that is easy to read where for each dial a single digit is shown through a window in the face of the meter, or of the pointer type where a pointer indicates each digit.
The processing and communication section has the responsibility of calculating the various derived quantities from the digital values generated by the metering engine.Single Phase Induction Type Energy Meter Construction,Working Principle,Operation,Creeping,Torque Equation The measurement of energy is the same process as measurement of power except that the instrument not merely indicates the power or rate of supply of energy but must take into account also the length of time for.
The most common type of electricity meter is the electromechanical watt-hour meter.   On a single-phase AC supply, the electromechanical induction meter operates through electromagnetic induction by counting the revolutions of a non-magnetic, but electrically conductive, metal disc which is made to rotate at a speed proportional to.
The energy meter thus determines and adds together or integrates all the instantaneous power values so that total energy used over a period is thus known.
Therefore, this type of meter is also called an “integrating” meter. Filed Under: Electrical Tagged With: Digital energy meter, Electronic energy meters, Energy meter, Induction type energy meter, Types of energy meters About Tarun Agarwal Tarun Agarwal is the Chief Customer Support Officer at Edgefx Technologies Pvt Ltd.
Thus we need an integrating instrument which can measure and record the energy consumed by the load under varying load condition. The simplest such instrument is Single Phase Induction Type Energy Meter.
Electro-mechanical type- The electro-mechanical induction meter operates by counting the revolutions of a non-magnetic, but electrically conductive, metal disc which is made to rotate at a speed proportional to the power passing through the meter.
The number of revolutions is thus proportional to the energy usage.Download