What do all the labeled letters on an electrical circuit diagram mean.

Electrical circuit diagram on all the labeled letters are:

QS knife switch, FU fuse, KM contactor, KA intermediate relay, KT time relay, title electrical appliances, KS speed relay, FR thermal relay, SB button, SQ travel switch.

Electrical circuit loss of voltage, under-voltage protection: realized by the electromagnetic mechanism of the contactor itself, when the power supply voltage is seriously too low or loss of voltage, the armature of the contactor releases itself, the motor is de-energized and stops.

Double interlocking of electrical circuits: The double interlocking can be switched directly from one operation state to another, which is "forward - reverse - stop". Direct start: the power supply voltage is directly added to the motor terminals, this control circuit structure is simple, low cost, only suitable for practice motor infrequent start, can not realize the remote automatic control.

Expanded Information

Principle of Electrical Circuit Architecture

The electrical schematic diagram is a kind of electrical system diagram. It is drawn according to the working principle of the control line diagram, with a simple structure and clear hierarchy. It is mainly used to study and analyze the working principle of the circuit.

Electrical layout and installation diagram is mainly used to show the actual installation location of various electrical equipment in mechanical equipment and electrical control cabinet. For mechanical and electrical in the control equipment manufacturing, installation, maintenance, repair to provide the necessary information.

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