How a Dpdt Relay Works

Relay is an electromagnetic device used to separate two circuits electrically and connect them magnetically. … They are often used to interface an electronic circuit, which works at a low voltage to an electrical circuit which works at a high voltage.

What does a relay DPDT do?

Relay is an electromagnetic device used to separate two circuits electrically and connect them magnetically. … They are often used to interface an electronic circuit, which works at a low voltage to an electrical circuit which works at a high voltage.

When should you use a relay?

One of the most common situations that require the use of a relay occurs when an application needs to switch from high to low current (or vice versa) within the same circuit. For example, the temperature sensors that power HVAC units require levels of amperage that vastly exceed the capacity of their wiring.