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The monitoring of earth leakage faults

机译:漏电故障监控

摘要

An earth leakage (or ground) fault monitoring means (10) for monitoring the presence of an earth leakage fault, using an earth leakage fault detector (12) and a remote indicating means (16). The invention is for use in circumstances where automatic tripping could have undesirable results, and tripping or disconnecting of the circuit may then be controlled by authorised personnel. A latching arrangement (26) and reset device (22) are provided such that the indicating means (16) continues to indicate that there has been an earth fault even if the fault disappears, until the reset devise (22) has been operated. The earth leakage fault detector (12) and the indicating means (16) are in separate housings (36, 24). The latching arrangement (26) and the reset device (22) may then be in either housing. In a preferred embodiment the latching arrangement (26) includes a relay (28) having contactors (28.2, 28.3) that are supplied from a separate supply. Preferably, two light emitting (18, 20) devices may be used, one for indicating the presence or previous existence of a fault and the other a fault free condition.
机译:漏电(或接地)故障监视装置(10),用于使用漏电故障检测器(12)和远程指示装置(16)来监视漏电故障的存在。本发明用于自动跳闸可能会产生不希望的结果,然后由授权人员控制电路跳闸或断开的情况。设有闩锁装置(26)和复位装置(22),使得指示装置(16)即使故障消失了也继续指示存在接地故障,直到复位装置(22)被操作为止。漏电故障检测器(12)和指示装置(16)位于单独的外壳(36、24)中。然后,闩锁装置(26)和复位装置(22)可以在任一壳体中。在优选的实施例中,闩锁装置(26)包括具有接触器(28.2、28.3)的继电器(28),该接触器由单独的电源供应。优选地,可以使用两个发光(18、20)装置,一个用于指示故障的存在或先前存在,而另一个用于指示无故障状况。

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