基于plc雙電源開關(guān)設(shè)計外文翻譯-plc設(shè)計-在線瀏覽
2024-07-24 13:09本頁面
【正文】 ic switching control, not only has the openphase protection, but also has a short circuit and overload protection, undervoltage protection function。 automatic phase lack detection, threephase current display, a road power supply circuit can automatically switch to another power source to load power supply, light and sound alarm。 in the event of a failure and return to normal when respectively sends out two difference obvious alarm and prompt sound effects. It overes the shortings of low double power supply switching control system without phase protection, can automatically reverse switch, as well as fault and return to normal when using a single audio prompts defects. The control system has perfect function, reliable performance, simple circuit structure, low manufacturing cost etc... 2 Intelligent dual power supplies switching main circuit control With short phase protection double load dual power automatic switching control circuit. It includes a main circuit and threephase short signal detecting sampling circuit. The main circuit of the input power supply power supply U1 and U2, its output has two 濱州學(xué)院專 科畢業(yè)設(shè)計 (外文翻譯 ) 3 loads W1 and W2. Power main circuit of AC contactor U1 through KM1 main contacts and a load of W1 connected。 under the control of a control circuit, a power failure occurs, the AC contactor lost the first electrically disconnected, so that the load of detachment faults power supply circuit, the AC contactor KM3 main contact closing conduction contact loop, will be connected to the fault loop load switch automatically to another normal power supply continues to supply. Power supply U1 and U2 main circuit input end of the automatic switch in QF1 and QF2 is the primary role of overload protection and shortcircuit protection。 similarly, the threephase power supply U2 A, B phase and C phase lack detection, but also the use of an intermediate relay KA4, KA5 and KA6, respectively connected to power the U2 main circuit A2, B2 phase and C2 phase and zero line N constitute a singlephase circuit, the
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鄂ICP備17016276號-1