What is a Contactor (HVAC) & Why Is It So Important? |

What is a Contactor (HVAC) & Why Is It So Important? |
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A contactor is an electrical device that is used for switching an electrical circuit on or off. It is considered to be a special type of relay. However, the basic difference between the relay and contactor is that the contactor is used in applications with higher current carrying capacity, whereas the relay is used for lower current applications. Contactors can be field mounted easily and are compact in size. Generally, these electrical devices feature multiple contacts. These contacts are, in most cases, normally open and provide operating power to the load when the contactor coil is energized. Contactors are most commonly used for controlling electric motors.

There are various types of contactors, and each type has its own set of features, capabilities, and applications. Contactors can break current over a wide range of currents, from a few amperes to thousands of amperes, and voltages from 24 VDC to thousands of volts. In addition, these electrical devices come in varying sizes, from hand-held dimensions to sizes measuring a meter or yard on one side (approximately).

The most common application area of the contactor is high-current load. Contactors are known for their capability to handle currents of over 5000 amperes and high power over 100 kW. Heavy motor currents produce arcs when being interrupted. These arcs can be reduced and controlled using a contactor

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⚠️ Danger ⚠️

Electrical work is very dangerous,

so please work with caution.

Otherwise, you may get hurt.

⚡Be safe while doing electrical work ⚡

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