基于plc雙電源開關(guān)設(shè)計外文翻譯-plc設(shè)計-文庫吧
2025-04-17 13:09 本頁面
【正文】 omatic reverse switch。 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。 power supply U2 main circuit through the AC contactor KM2 main contacts and a load of W2 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。 two phase power supply main loop in each phase are current meter to indicate the phase current status, with the control circuit of phase lack detection. The threephase openphase detection signal sampling circuit, the phase detection signal directly from the main circuit of threephase power supply, namely the intermediate relay KA1 ~ KA3KA4 ~ KA6 are respectively connected to the power supply main loop U1 and U2 A, B phase and C phase of the singlephase circuit, KA1 ~ KA3 and KA
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鄂ICP備17016276號-1