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    • 5. 发明专利
    • Fault supervisory circuit
    • 故障监控电路
    • JPS60192451A
    • 1985-09-30
    • JP4863684
    • 1984-03-14
    • Fujitsu LtdHitachi LtdNec CorpNippon Telegr & Teleph Corp Oki Electric Ind Co Ltd
    • KAWAKATSU HIDEOSUZUKI YASUYUKIKIDA MAMORUSAKURAI TAKEOSHIBANO SHIYOUGO
    • H04M3/22H04M3/28
    • H04M3/28
    • PURPOSE:To detect earthing, positive abnormal voltage and negative abnormal voltage and also crosstalk between lines by providing a supervisory circuit capable of alarming having a power supply of the same level as each class identification power supply corresponding to each class identification power supply, detecting a voltage when a voltage different from the voltage of each power supply is inputted including earthing. CONSTITUTION:A +13V or -13V low battery voltage is applied to polar relays LPB, LNB via a rectifier circuit comprising a bridge consisting of diodes D respectively, a +50V or -48V high battery voltage is fed respectively to polar relays HPB and HNB via a resistor R. An alarm lamp LPBAL indicates a faulty state of a line (LPB) that a voltage other than +13V, that is in excess of +13V or not reaching +13V or earthing exists positively. Further, an alarm lamp HPBAL indicates a fault of a line (HPB) that a voltage other than +50V, that is a positive or negative voltage not reaching +50V exists.
    • 目的:通过提供能够报警的监控电路来检测接地,正异常电压和负异常电压以及线路之间的串扰,该监控电路具有与每个类别识别电源相对应的每个类别识别电源具有相同电平的电源,检测 输入与各电源的电压不同的电压时的电压,包括接地。 构成:分别通过包括由二极管D构成的桥的整流电路将极小的继电器LPB,LNB施加A + 13V或-13V的低电池电压,将+ 50V或-48V的高电池电压分别馈送到极性继电器HPB和HNB 报警灯LPBAL指示线路(LPB)的故障状态,超过+ 13V或不达到+ 13V或接地的+ 13V以外的电压或接地存在。 此外,报警灯HPBAL表示存在线路故障(HPB),即+ 50V以外的电压,即正或负电压未达到+ 50V。