The principle of electrical control circuit schematic drawing illustrates

Electrical control circuit schematic drawing diagrams ( 1) Circuit principle diagram drawing is divided into the power circuit, main circuit, control circuit, signal circuit, and lighting circuit drawing. The original road map can be horizontal layout, vertical layout. Horizontal layout, vertical drawing power circuit and other circuit level, control circuit of the energy dissipation element ( Such as the contactor and relay coil, lights, lighting, etc. ) The most the right to draw in a circuit. Vertical layout, power supply circuit level, vertical drawing other circuit, control circuit of the energy dissipation element to paint at the bottom of the circuit. Power circuit as horizontal line, three-phase ac power phase sequence of L1, L2, L3 top-down, line N and the protection of ground wire drawing PE under phase line. In the dc power is end, next draw the negative side of things. Main circuit is protected by electric power plant and electrical appliances, it is by the working current of the motor, electric current is bigger, the main circuit to draw in the schematic diagram on the left side of the vertical power supply circuit. Control circuit is to point to control the working state of main circuit circuit. Signal refers to show the status of the main circuit circuit. Lighting circuit refers to the circuit to realize the local lighting of machine tool equipment. These the current through the circuit is smaller, schematic diagram, control circuit, signal circuit, lighting circuit will, in turn, vertical picture on the right side of the circuit. ( 2) Components map (1) principle, each electrical contact position according to the circuit without electricity or electronics when external force is not a normal position to draw. (2) the principle diagram, the appearance of various electrical components do not draw the actual figure. With the provisions of the state's unified national standard symbols to draw. (3) the principle diagram, the same electrical components according to their actual location not together, but according to its role points in a circuit drawing in different circuits, but their action is interlinked, must be marked with the same letter symbols. ( 3) Electrical components layout electrical components arrangement is mainly indicated that mechanical equipment on all electrical equipment and the actual location of the electrical components, are essential to electrical control equipment manufacturing, installation and maintenance of technical documentation. ( 4) The wiring diagram wiring diagram is mainly used for installation of wiring, line inspection, line maintenance and troubleshooting. It said the equipment electrical control system of each unit and the connection between the various components of relationship, and identify the data needed, such as terminal number, connecting wire parameters. In practical application are usually used with circuit diagram and the drawing.