Power generator set and power grid power supplying automatic switching program-controlled device with high electromagnetic interference resistance

Abstract

The invention relates to a power generator set and power grid power supplying automatic switching program-controlled device with advantages of high electromagnetic interference resistance, high long-term operation stability and high switching speed. The device comprises a three-phase power supply a, b, c of a power generator set F and a three-phase power supply A, B, C of a power grid power supply G. The a phase of the power supply of the power generator set is connected with a power generator set power supply air switch DK2 and is connected with one end of a normally closed contact A6 of a power grid testing intermediate relay CA. The other end of a normally closed contact A6 of the power grid testing intermediate relay CA is connected with one end of a power generator testing intermediate relay CB. The device has high reliability. A current power generator set and power grid power supplying automatic switching program-controlled device can realize 3000-5000 times of switching without faults, and the power generator set and power grid power supplying automatic switching program-controlled device with high electromagnetic interference resistance can realize more than 10000 times of switching without fault, thereby greatly improving reliability.

Description

[0001] The present invention is a divisional application of the application number 201410742055X, the application date is December 9, 2014, and the invention name is "a program-controlled device for automatic switching between generator set and grid power supply". technical field [0002] The invention relates to a program control device for automatic switching between a generating set and a power grid with strong anti-electromagnetic interference, and belongs to the field of electronic technology. Background technique [0003] In daily production and life, there are many important equipment or departments whose power supply is prohibited to be interrupted, and their power consumption must be guaranteed to be continuous and very safe and reliable. [0004] The working principle of the program-controlled device for automatically switching between the generator set and the grid power supply is: when the grid power supply is normal, the load is normally powered by the grid; The...

AI Technical Summary

Problems solved by technology

[0005] The current program-controlled devices for automatic switching between generator sets and grid power supply have poor anti-electromagnetic interference performance, poor long-term working stability, and are prone to failures, which seriously affect the normal operation of production and life; There are few faults, but the structure is often complicated and the cost is high, which does not meet the national conditions of our country; in addition, the current automatic switch between the generator set and the grid power supply program-controlled device has a slow conversion speed, generally 1s-3s

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