control transformer pdf

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    Procon Controls has 23 years of

    expertise in manufacturing electrical

    transformers. They are the foremost

    manufacturers, suppliers and

    exporters in the field of transformers

    located at Coimbatore, Tamil Nadu.

    The products manufactured by this

    company are highly acclaimed for its

    unique features like excellent voltage

    regulation, durable, compact design

    and overload ca acit . Servicin

    IndustrialControl

    TransformerSimple Presentation on

    Control Transformer

    Ram Prasad

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    Industrial Control Transformer

    Procon Controls Page 1

    When an electronic circuit requires constant voltage or constant current with low power or

    volt-amp rating, a control transformer comes into the picture. Capacitors and other filtering

    devices are used to reduce the variations in the output. As a result, constant voltage or current

    is obtained.

    The transformer is based on the principle of electromagnetic induction. The principle states

    that a changing magnetic field within a coil of wire induces a voltage across the ends of the coil

    (electromagnetic induction). Changing the current in the primary coil changes the magnetic flux

    that is developed. In turn, the changing magnetic flux induces a voltage in the secondary coil.

    Thecontrol transformeris designed for industrial usage where electromagnetic devices such as

    relays and solenoids are used. These transformers maximize inrush capability and output

    voltage regulation when electromagnetic devices are primarily energized.

    These transformers include high-quality insulating materials. This insulation provides electrical

    protection to turn-to-turn windings, layer to layer windings, primary to secondary windings and

    ground. The transformers are vacuuming permeated with VT polyester resin and oven-cured.

    This seals the surface and eliminates moisture. Filling the entire unit provides a strong

    mechanical bond and offers protection from the environment.

    Control Transformer is utilized in many industries and applications including:

    Motor Drives & Controls Induction Heating & Melting Aviation Applications

    Mining Equipment Power Supplies Marine Applications Heavy Industry Medical Applications

    http://www.proconcontrols.com/control-transformers.phphttp://www.proconcontrols.com/control-transformers.phphttp://www.proconcontrols.com/control-transformers.phphttp://www.proconcontrols.com/control-transformers.php
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    Industrial Control Transformer

    Procon Controls Page 2

    The advantage of using a control transformer is the inherent stability of the voltage supplied

    from a transformer and its ability to handle extreme current peaks. When the start button on a

    motor starter is pushed and the contactor coil energizes, there is a very brief (typically 30 to 50

    milliseconds) surge in current demand known as an "inrush current". This peak can surpass 10times the normal current flow, and transformers handle these peaks far more competently

    than a conventional supply.

    Advantages:

    Using a control transformer to supply control power provides a lower, safer and moreefficient control circuit voltage to be used in high working voltage applications.

    The excellent inrush current handling characteristics of transformer supplied power alsomakes for a more efficient power supply.

    The use of lower voltages in a control circuit provides the workers using stop and startbuttons in hazardous environments with safety.

    For correct control transformer specification, three features of the load circuit must be

    determined in addition to the minimum voltage essential to operate the circuit. These are- total

    steady-state (sealed) VA, total inrush VA, and inrush load power factor.

    About Procon Controls:

    Procon Controls has 23 years of expertise in manufacturing electrical transformers. They are

    the foremost manufacturers, suppliers and exporters in the field of transformers located atCoimbatore, Tamil Nadu. The products manufactured by this company are highly acclaimed for

    its unique features like excellent voltage regulation, durable, compact design and overload

    capacity. Servicing customers is their first and foremost motto.

    Corporate Video:

    http://www.proconcontrols.com/http://www.proconcontrols.com/http://www.proconcontrols.com/
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    Industrial Control Transformer

    Procon Controls Page 3

    http://www.youtube.com/watch?v=0YXfsqFnqpY