Introduction to Honggang cutting machine electrical components relay [Ponse cutting machine encyclopedia]
A relay is an electrical control device, an electrical appliance that makes the predetermined step change in the electrical output circuit when the input (excitation) changes reach the required requirements. It has the interaction relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuit, it is actually a small current to control the operation of large current "automatic switch". Therefore, it plays the role of automatic regulation, safety protection and conversion circuit in the circuit.