Electrical contactor

Step 2: Find Up To Four Local Electrician Experts. How does an electrical contactor work? What are the functions of relay and contactor? What is the difference between a relay and a contactor?

Electrical Technology Controlling, Motors, Protection Comment.

Contactors are often used for 1Hp motor. Energy-efficient IEC magnetic contactors are for power circuit switching and can provide automatic cutoff in the event of a power failure. NEMA magnetic contactors are for switching heating loads, capacitors, transformers, and electric motors. Perhaps the most common industrial use for contactors is the control of electric motors. The top three contacts switch the respective phases of the incoming 3-phase AC power, typically at least 4Volts for motors horsepower or greater.

The lowest contact is an “auxiliary” contact which has a current rating much lower than that of the large motor power contacts , but is actuated by the same armature as the power contacts. The coil energizes the contactor , moving the contacts into position. A contactor really has only two basic parts: the contacts and the coil.

The contacts transmit the current from the source to the load. Related Questions More Below. Main purposes of these electrical controlling circuits are control larger electrical device such as motors, generators ect. We provide energy-efficient solutions that help our customers effectively manage electrical , hydraulic and mechanical power more efficiently, safely and sustainably.

Each contact is a piece of electrically conductive material, usually metal. This contactor operates our entire house perfectly,when combined with the ICM 4single phase line monitor. It is used for power switching.

A relay consists of at least two contacts and an excitation coil. These contacts may be normally open or normally closed. Make sure that the contacts of the contactor are rated in both voltage. Study the contactor manufacturer information.

Check for an auxiliary output contact. Some contactors provide an auxiliary output contact as. An electrical contactor is a switching device, widely used for the switching of motors, capacitors (for power factor correction) and lights. As the name indicates contactor is used to make or break contacts as like an ordinary on-off switch.

Working of contactor : A simple circuit diagram. Free electrical , electronic, pneumatic and hydraulic symbols library with DXF, DWG and Visio formats, ordered by categories.

Definite Purpose Starters are suitable for a wide range low-cycle duty applications requiring low cost switching of single- and three-phase loads. They combine the features and flexibility of definite purpose contactors and Freedom Series overload relays, mounted on a common mounting plate. Thus far we have seen a selection of Input devices that can be used to detect or “sense” a variety of physical variables and signals and are therefore called Sensors.