Relay control to microprocessor control

Microprocessors and microcomputers has been rapid development and application development, which allows the rapid spread of computer technology, penetrate into all areas of the national economy, science and technology to make a significant change to make automatic control technology a new look, but also to continue the traditional  mcb circuit breaker  controlled to change  power transformers . One from the relay control to microprocessor control is well known, industrial automation and control, including two aspects: 1. Automatic operation: instead of manual labor, machinery, electrical, pneumatic, hydraulic and other automatic operation; 2 automatic control: instead of people judgment and control, with automatic control  Circuit breaker  and control, automatic mechanical movement command. In the field of automatic control, sequence control device called the sequence controller. In power plants, steel mills, machining automatic lines and other industrial fields, accounting for a significant proportion of the sequential control.