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Method of setting a ground fault trip function for a trip unit and a trip unit having a defined trip function for ground fault protection

机译:为跳闸单元设置接地故障跳闸功能的方法以及具有用于接地故障保护的已定义跳闸功能的跳闸单元

摘要

A method (20) of setting a trip ground fault trip function for a trip unit (4) includes enabling a ground fault protection mode for the trip unit (4), and setting one of a plurality of a trip functions (60, 80) for the trip unit. At least one of the plurality of trip functions (60, 80) being an I^4t inverse time function (100) that establishes a trip characteristic to interrupt current upon sensing a ground fault indication. The method further includes monitoring an electrical circuit (10) for a ground fault.
机译:为跳闸单元(4)设置跳闸接地故障跳闸功能的方法(20)包括为跳闸单元(4)启用接地故障保护模式,以及设置多个跳闸功能(60、80)之一用于旅行单元。多个跳闸功能(60、80)中的至少一个是I 4t逆时函数(100),其建立跳闸特性以在感测到接地故障指示时中断电流。该方法还包括监视电路(10)的接地故障。

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