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Method and apparatus for monitoring faults by means of a polygonal trigger region
Method and apparatus for monitoring faults by means of a polygonal trigger region
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机译:借助于多边形触发区域监视故障的方法和设备
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摘要
A method of, and apparatus for, monitoring faults at electrical lines, wherein there are formed a multiplicity of detection signals, and threshold monitoring the phase angle between timewise successive detection signals. According to a first aspect of the invention none of the detection signals has a magnitude equal to the line voltage signal. As a further aspect one of the detection signals can comprise an external signal. A still further feature contemplates that one of the detection signals is a difference signal formed by the line voltage signal and an external signal.
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