KL9060在負(fù)載自動(dòng)切換開(kāi)關(guān)的控制電路中、配置有如下功能完善的可控硅(SCR)保護(hù)電路:一旦發(fā)生SCR的“開(kāi)路”或“短路”故障時(shí),它可以確保在不間斷地向網(wǎng)絡(luò)設(shè)備供電的條件下,自動(dòng)檢測(cè)出“故障元件”、發(fā)出報(bào)警信號(hào)、并釆用相應(yīng)的“故障隔離”保護(hù)措施。
KL9060
(1) 可控硅“短路故障”保護(hù)功能:LTM開(kāi)關(guān)不停地監(jiān)測(cè)著它的各個(gè)SCR型靜態(tài)開(kāi)關(guān)的實(shí)時(shí)運(yùn)行狀態(tài)(見(jiàn)圖2)。當(dāng)發(fā)生“短路故障”的STS1開(kāi)關(guān)出現(xiàn)在“優(yōu)先供電通道”上時(shí),負(fù)載自動(dòng)切換開(kāi)關(guān)就會(huì)在發(fā)出報(bào)警信號(hào)的同時(shí),將處于“備用電供電通道”上的輸入斷路器開(kāi)關(guān)CB2置于“脫扣跳閘”狀態(tài),從而達(dá)到防止兩路交流輸入電源可能被直接地”接通的事故”發(fā)生的目的。反之,當(dāng)發(fā)生“短路故障”的STS2開(kāi)關(guān)出現(xiàn)在“備用電供電通道”上時(shí),負(fù)載自動(dòng)切換開(kāi)關(guān)會(huì)在發(fā)出報(bào)警信號(hào)的同時(shí),將處于“優(yōu)先供電通道”上的輸入斷路器開(kāi)關(guān)CB1置于“脫扣跳閘”狀態(tài)。
(2) 可控硅“開(kāi)路故障”保護(hù)功能:在LTM開(kāi)關(guān)的運(yùn)行中,如果遇到它的SCR型靜態(tài)開(kāi)關(guān)發(fā)生開(kāi)路故障時(shí)、在邏輯控制板的調(diào)控下,LTM開(kāi)關(guān)會(huì)執(zhí)行如下操作:在發(fā)出故障報(bào)警信號(hào)的同時(shí),通過(guò)自動(dòng)執(zhí)行切換操作、將用戶的負(fù)載連接到另一路正常工作的輸入電源上。

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