基于plc雙電源開關(guān)設(shè)計(jì)外文翻譯-plc設(shè)計(jì)-文庫吧資料
2025-05-22 13:09本頁面
【正文】 U1 to power supply, so as to realize openphase protection automatic switching. In automatic switching control process, auxiliary relay R1 and R2 main function is: when troubleshooting, threephase power U1 or U2 recover the normal power supply, R1 (or R2) have electricity, the normally closed contact action, R3 reset, cut KM3 (Y2), then KM1 (Y0) or KM1 (Y1) plex have electricity, thereby automatically reverse switching back to the power supply to load W1 U1, U2 W2 power supply to load the normal power supply state. The control circuit adopts electric whistle (or buzzer) as an alarm sound (at) the same time with the red signal (at the same time with the red signal lamp), and returned to normal when the bell HA as prompt sound. Can produce two distinct alarms and prompt sound effects. 濱州學(xué)院專 科畢業(yè)設(shè)計(jì) (外文翻譯 ) 5 智能雙電源 1 智能雙電源切換的技術(shù)方案 本文所述的雙負(fù)載 — 雙電源自動(dòng)切換的 PLC控制 ,用 PLC控制程序取代繼電器邏輯控制電路 ,其具有對三相供電電源的缺相檢測及保護(hù)切換功能 ,在電源恢復(fù)正常后能自動(dòng)進(jìn)行反切換 ,當(dāng)發(fā)生故障和恢復(fù)正常時(shí)能分別發(fā)出兩種區(qū)別明顯的報(bào)警和提示音響。 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 KA4 ~ KA6 normally open contact as U1 and U2 threephase openphase detection switch sampling signal, to the PLC input terminal. Considering the PLC relay output point load capacity, through the contactor KM01 ~ KM03 to drive high current contactor KM1 ~ KM3. For threephase power U1 A, B phase and C phase lack detection, the use of an intermediate relay KA1, KA2 and KA3, respectively connected to power the U1 main circuit A, B phase and C phase and zero line N constitute a singlephase circuit, the formation of A1, B1 and C1 phase detection circuit. The normally open contact of KA
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