Download - control transformer pdf
-
7/28/2019 control transformer pdf
1/4
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
-
7/28/2019 control transformer pdf
2/4
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 -
7/28/2019 control transformer pdf
3/4
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/ -
7/28/2019 control transformer pdf
4/4
Industrial Control Transformer
Procon Controls Page 3
http://www.youtube.com/watch?v=0YXfsqFnqpY