Relay generally has induction mechanisms (such as current, voltage, power, impedance, frequency, frequency, temperature, pressure, speed, light, etc.); The execution agency (output part) controlled by the disconnection; between the input and output parts of the relay, there is also an intermediate mechanism (drive part) that drives the input volume, function processing and the drive of the output part.
As a control element, in summary, the relay has the following functions:
(1) Expansion control range: For example, when the control signal of the multi -contact relay reaches a certain value, it can be replaced, cut off, and connects multi -road circuits according to different forms of the contact group.
(2) Ecesss: For example, sensitive relay, intermediate relay, etc., use a very small amount of control, can control a high -power circuit.
(3) Comprehensive signal: For example, when multiple control signals enter multi -winding relay in the specified form, after a comprehensive comprehensive, the predetermined control effect is achieved.
(4) Automatic, remote control, monitoring: For example, the relay on the automatic device and other electrical appliances can form a program control line to achieve automated operation.
