Excuse me, what components are MC, INV and MS in the circuit?

MC is contactor, INV is frequency converter and MS is switch.

The working principle between components can be known from the circuit diagram, which provides a planning scheme for analyzing performance and installing electronic and electrical products. When designing the circuit, engineers can finish it on paper or computer calmly, and then install it after confirming it is perfect. Improve and fix errors through debugging until success.

Using circuit simulation software to carry out circuit aided design and virtual circuit experiment can improve engineers' work efficiency, save learning time and make physical drawings more intuitive.

Extended data

The identification of circuits includes the judgment of correct circuits and wrong circuits, and the judgment of series circuits and parallel circuits. Error circuits include the lack of necessary components (including power supply, electrical appliances, switches, wires) in the circuit, failure to form a current path, open circuit or short circuit. Current direction method is usually used to judge the connection of circuits.

If the current flows through each appliance in turn without shunt, the appliances are connected in series; If the current branches back and forth when passing through the appliances, that is, the current passing through each appliance is a part of the total current, then these appliances are connected in parallel. When judging the connection of a circuit, it is usually that two points of the circuit are connected by a wire.

In junior high school, the resistance of a conductor can be ignored, so two points connected by a conductor can be regarded as one point, so it is convenient to judge the connection of circuits by the method of "node" sometimes.

Baidu Encyclopedia-Circuit Diagram