Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Electromechanical Meters
Electromechanical energy meters are based on the Ferraris Principle (see note in the margin). The working of these meters is explained.
Working of Electromechanical Meters
The meters have a revolving metallic disc mounted on jewel bearings or magnetic suspension bearings. The display is cyclometer or mechanical counters and accuracy is classically 1% or 2% (class 1.0 or 2.0). They cater to limited tariffs applicable majorly to 1-phase or 3- phase direct connected segment (whole current meters).The electromechanical induction meter operates through counting the revolutions of the disc that rotates at a speed proportional to the power consumed.
The number of revolutions is, therefore, proportional to the energy usage. The metallic disc is acted upon through three magnetic fields, one proportional to the voltage, the other to the current and a third constant field supplied by a permanent magnet. One of the varying fields induces currents in the metallic disc, that are then acted upon through the other varying field to produce a torque.
This results in the torque being proportional to the product of the current and voltage, that is power. As the metallic disc rotates through the permanent magnetic field, eddy currents are again produced that dissipate energy (because the disc has some resistance) and act to slow the rotation. This drag is proportional to the rotation speed. The equilibrium among the applied torque and the drag results within a speed proportional to the power. The rotating disc in this category of meter is, actually, an electric motor of a category known as a reluctance motor or eddy current motor. It consumes a little amount of power, classically around 2 W.
HOW ARE FLIP-FLOPS USED IN BINARY COUNTERS
Q. What can explain the failure of relative PPP to hold in reality? Answer: Government procedures of the price level differ from country to country. One cause for thes
Q. A transmission line with a dielectric (εr = 3.5) is 100 m long. At a frequency of 10 GHz, how many wavelengths long is the line?
The ampere has been defined (by the International Committee of Weights and Measures in 1946) as the current flowing in two long parallel wires 1 metre apart that produces a force o
Give the properties and application of cotton. Cotton : It is base material for insulating fibres. Properties: It can be enhanced by impregnating with varnish. 1)
How to do?
Elementary Induction Machines In the discussion that followed Equation, the third possiblemethod of producing constant torque was to cause the mmf axes of stator and rotor to r
1. A very narrow laser beam in air is shone into a sphere of solid glass that has a uniform refractive index n>1 and radius ? . The beam makes an angle a in air with the normal to
how does this circuit work and what are th electrical components in it do?
How do I calculate the line-cable and cable-line values of reflection and refraction coordinates?
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd