Question

what is a control Circuit ?
give real applications on control Circuit

Answer 1

Control Circuit Definition ::

A control circuit is nothing but a circuit that exercises control over one or more other circuits. The elements of a control circuit include all the equipment and devices concerned with the function of the circuit: conductors, raceway, contactor-operating coil, source of energy supply to the circuit, overcurrent protective devices, and all switching devices that govern energization of the operating coil.

The control circuit uses contactors or high power solid state devices to control stuff on the power circuit side. This buffer between the two types of circuits provides a margin of safety as well as limits the size of the controls needed on the panel.

Applications ::

• Control, as applied to control circuits, is a broad term that means anything from a simple toggle switch to a complex system of components which may include relays, contactors, timers, switches, and indicating lights.
• Every electrical circuit for light or power has control elements. One example of a simple control circuit is a light switch used to turn lights on and off.
• Of course there are many other devices and equipment systems in industrial applications.
• Motor control, for example, can be used to start and stop a motor and protect the motor, associated machinery, and personnel.
• In addition, motor controllers might also be used for reversing, changing speed, jogging, sequencing, and pilot-light indication.
• Control circuits can be complex: accomplishing high degrees of automatic and precise machine operation.