The design and testing of an in-service fuse tester

被引：0

作者：

Redfern, M.A. ^{[1
]}

Brown, D. ^{[1
]}

Bartlett, M.G. ^{[1
]}

机构：

[1] Dept. of Electron. and Elec. Eng., University of Bath, Bath BA2 7AY, United Kingdom

来源：

Proceedings of the Universities Power Engineering Conference | 2000年

关键词：

Electric impedance - Electric network analysis - Electronic equipment testing - Microwave circuits - Pulse generators - Short circuit currents - Transmission line theory;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The aim of the project was to design, build and test an in-service fuse tester that will determine whether or not a live LV fuse was blown. The challenge was that the fuse is in a parallel feed circuit, and therefore could be live on both terminals. The techniques used were derived from microwave technology. A short pulse was generated by a pulse generator, which was then injected into an inverse transmission line model via a matching circuit. A receiver circuit was connected to the same end of the transmission line as the pulse generator. This circuit was responsible for analysing the signal returning from the inverse transmission line due to its load impedance. A short circuit represents a healthy fuse and an open circuit a blown fuse. The output of the receiver gives a clear indication of whether the load was an open circuit or a closed circuit, and thus whether or not the fuse has blown. The concept of using a high frequency signal to determine the impedance of a circuit was proven to be effective.

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