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What is the symbol for a relay?
The new symbol for the relay is represented by the letter K.
Relays are subdivided into: voltage relay KV; current relay KA; time relay KT; frequency relay KF; pressure relay KP; control relay KC; signal relay KS; grounding relay KE.
A relay is an electrical control device. It is an electrical appliance that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity reaches the specified requirements.
The function of the relay: It has the interactive relationship between the control system and the controlled system. It is usually used in automated control circuits, where it plays the roles of automatic adjustment, safety protection, and conversion circuits.
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