Low-voltage automatic-switching control device with high speed of 2 milliseconds

Abstract

The invention discloses a low-voltage automatic-switching control device with the high speed of 2 milliseconds, and relates to the field of low-voltage motor protection. The low-voltage automatic-switching control device comprises a main control unit and an execution unit. The main control unit and the execution unit are connected, the main control unit is further connected with an input module, a keyboard module and a communication module, the input module comprises a current sensor and a voltage sensor, the execution unit comprises a switching-on module and a switching-off module, the main control unit comprises a processor, a display module, a storage module and an interface module, the processor comprises a 32-bit CPU1 and a 32-bit CPU2, and the input module is an A / D analog converter. The low-voltage automatic-switching control device has the advantages of being compact in structure, high in integration level, good in synchronous observation effect, sensitive in reaction, quick in action, and capable of finishing the overall switching work within five seconds and guaranteeing stability of a production line.

Description

technical field [0001] The invention relates to the field of low-voltage motor protection, in particular to a low-voltage fast 2ms automatic switching control device. technical background [0002] The safety and reliability of power equipment is an important link in the safety of large factories and production workshops, especially in the period of rapid economic growth in China, the power supply load of the State Grid is increasing, and the accompanying power failures are also increasing, such as power outages in circuits , short circuit, and grounding, etc., the occurrence of these situations will cause the interruption of the operation of the motor in the factory, resulting in the stop of the production line, which will bring huge losses to the factory. It is an urgent task to design a reasonable switching device. Speculative devices mostly use UPS system, the fastest speed is more than 100ms, and the current is limited, which obviously cannot meet the actual needs, such ...

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Problems solved by technology

[0002] The safety and reliability of power equipment is an important link in the safety of large factories and production workshops, especially in the period of rapid economic growth in China, the power supply load of the State Grid is increasing, and the accompanying power failures are also increasing, such as power outages in circuits , short circuit, and grounding, etc., the occurrence of these situations will cause the interruption of the operation of the motor in the factory, resulting in the stop of the production line, which will bring huge losses to the factory. It is an urgent task to design a reasonable switching device. Speculative devices mostly use UPS system, the fastest speed is more than 100ms, and the current is limited, which obviously cannot meet the actual needs, such as the application number: 201310197034. The signal and analysis and processing have been strengthened, and the function of synchronous display has been added, but no major changes have been made in the automatic switching device, which still cannot meet the actual needs, so a fast and sensitive switching device is designed. Cutting devices remain a concern

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