Preview

Induction type energy meter

Good Essays
Open Document
Open Document
892 Words
Grammar
Grammar
Plagiarism
Plagiarism
Writing
Writing
Score
Score
Induction type energy meter
Single phase induction type energy meter is also popularly known as watt-hour meter. This name is given to it. This article is only focused about its constructional features and its working. Induction type energy meter essentially consists of following components:

1. Driving system
2. Moving system
3. Braking system and
4. Registering system

Driving system
It consists of two electromagnets, called “shunt” magnet and “series” magnet, of laminated construction. A coil having large number of turns of fine wire is wound on the middle limb of the shunt magnet.

This coil is known as “pressure or voltage” coil and is connected across the supply mains. This voltage coil has many turns and is arranged to be as highly inductive as possible. In other words, the voltage coil produces a high ratio of inductance to resistance.

This causes the current and therefore the flux, to lag the supply voltage by nearly 90 degree.
Single-phase induction kilowatt hour meter - Construction
Single-phase induction kilowatt hour meter - Construction

An adjustable copper shading rings are provided on the central limb of the shunt magnet to make the phase angle displacement between magnetic field set up by shunt magnet and supply voltage is approximately 90 degree.

The copper shading bands are also called the power factor compensator or compensating loop. The series electromagnet is energized by a coil, known as “current” coil which is connected in series with the load so that it carry the load current. The flux produced by this magnet is proportional to, and in phase with the load current.

Go to index ↑

Moving system
The moving system essentially consists of a light rotating aluminium disk mounted on a vertical spindle or shaft. The shaft that supports the aluminium disk is connected by a gear arrangement to the clock mechanism on the front of the meter to provide information that consumed energy by the load.

The time varying (sinusoidal) fluxes produced by

You May Also Find These Documents Helpful

  • Good Essays

    Nt1310 Final Exam

    • 931 Words
    • 4 Pages

    e. Filament Transformer- a step down transformer that is located between mA selector and filament. It increases the current to heat the filament and decrease voltage. The mA selector provides precise current to the step down transformer.…

    • 931 Words
    • 4 Pages
    Good Essays
  • Better Essays

    Yoke- It is the outer frame of a DC and it is made up of cast iron or steel. It carries the magnetic flux produced by field…

    • 1562 Words
    • 7 Pages
    Better Essays
  • Good Essays

    The contacts conduct electricity to the copper ring. The copper ring rotates rapidly but does not…

    • 272 Words
    • 2 Pages
    Good Essays
  • Good Essays

    4. A square coil of sides 5.0 cm contains 10 0 loops and is positioned…

    • 588 Words
    • 3 Pages
    Good Essays
  • Good Essays

    Contactors: Relay and Coil

    • 1021 Words
    • 5 Pages

    The armature of a contactor is connected by a mechanical linkage to a set of contacts that causes a completed circuit when the armature is pulled into the magnetic field produced by the coil. The coil characteristics depend on the type of wire and the manner in which it is wound. Coils are designed to operated on 24volts, 120 volts, 208/240 volts, and 480 volts. Contactors are rated by the ampere draw they can carry. There are two types of loads that contactors can control: and inductive load which has a higher ampere draw on startup than while running; and a resistive load which has a constant ampere draw such as a resistance heater. Contacts are made of silver and cadmium (is a chemical element with the symbol Cd and atomic number 48. The soft, bluish-white metal is chemically similar to the two other metals in group 12, zinc and mercury), which resists sticking. The contacts are…

    • 1021 Words
    • 5 Pages
    Good Essays
  • Good Essays

    A. Increasing the current in the coil B. Increasing the number of loops in the coil…

    • 692 Words
    • 3 Pages
    Good Essays
  • Good Essays

    assign 1 magnetism

    • 1742 Words
    • 7 Pages

    A.C. P7 Describe the properties and an application of two different magnetic materials commonly used in electrical and electronic engineering…

    • 1742 Words
    • 7 Pages
    Good Essays
  • Good Essays

    A simple DC electric motor. When the coil is powered, a magnetic field is generated around the armature. The left side of the armature is pushed away from the left magnet and drawn toward the right, causing rotation.…

    • 3439 Words
    • 11 Pages
    Good Essays
  • Good Essays

    Faraday's Law Lab Report

    • 626 Words
    • 3 Pages

    B is the magnetic field at the location of the coil. A is the cross sectional area of the coil, and Θ is the angle between the field and the area A. There is several different ways to create a changing flux though the coil. An easy way is to use a magnet moving near the coil to change B passing through the coil. Another way is to change B is to use a magnetic field B using another coil. If the tne current in the primary coil is changed, then the magnetic field through the secondary or pick up coil changes inducing a voltage.…

    • 626 Words
    • 3 Pages
    Good Essays
  • Powerful Essays

    Faradays Law of Induction

    • 1124 Words
    • 5 Pages

    The induced emf is proportional to the number of turns Nc in the “pick-up” coil and is related to the rate of change in the magnetic flux F the pick-up coil. If the magnetic flux F is in units of Webers ,time t in sec, the induced voltage Vemf will be in…

    • 1124 Words
    • 5 Pages
    Powerful Essays
  • Powerful Essays

    Winding pitch

    • 3903 Words
    • 16 Pages

    Issue #WP105: Technical Information from Cummins Generator Technologies AC Generators with 2/3rd and 5/6th winding pitch White Paper Dr Jawad Al-Tayie Chris Whitworth Dr Andreas Biebighaeuser Abstract Cummins Generator Technologies has in case of parallel operation and also will a wide range of AC generator products impact on the type of neutral grounding covering many applications, from prime method. Paralleling generators with power to marine, oil and gas to name different winding pitch will require careful a few. The stator of the AC generator consideration if interconnecting star is manufactured with either a 2/3rd points of all running generators should be or a 5/6th winding pitch. Winding pitch necessary.…

    • 3903 Words
    • 16 Pages
    Powerful Essays
  • Good Essays

    We usually move electrons to do work, and when we move a lot of them, we create a large magnetic field around the conductor through which the electrons move. The moving electrons are electricity, and if we coil the conductor through which the current is flowing, we can cause the magnetic field around the individual wires to "add up" and make one bigger field. The bigger field "reaches around" the entire coil of wire, and the magnetic lines of force all flow through the center, and then out one end, around the coil in all directions, and then back into the other end. This is where l (L) and N come into play, increasing the length of the wire and the amount of coils means for a stronger EMF just like with changing the Magnetic Field…

    • 1030 Words
    • 5 Pages
    Good Essays
  • Better Essays

    The distributor is separated into three sections: the upper, middle, and lower. In the middle section, the corners of the spinning breaker cam strike the breaker arm and separate the points some 160 miles an hour. High-voltage surges generated by the action of the coil travel to the rotor that whirls inside a circle of high-tension terminals in the distributor cap, at each terminal, current is transferred to wires that lead to the spark plugs. Two other devices - the vacuum advance and…

    • 1949 Words
    • 8 Pages
    Better Essays
  • Better Essays

    Dynamics of a trolley rails

    • 2958 Words
    • 14 Pages

    around the magnet suddenly changes, and this induces a sudden voltage across the coil. It generates…

    • 2958 Words
    • 14 Pages
    Better Essays
  • Powerful Essays

    types of welding

    • 1470 Words
    • 6 Pages

    pool of liquid metal is formed to use the electrical resistance of the molten slag.…

    • 1470 Words
    • 6 Pages
    Powerful Essays

Related Topics