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Development of a static distance relay with conic characteristics for the protection of long transmission lines

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4 Author(s)
Shanmugasundaram, A. ; PSG College of Technology, Department of Electrical Engineering, Coimbatore, India ; Palanichami, S. ; Gangadharan, G. ; Bhoopathirajan, P.

The paper reports the development of a static distance relay with conic characteristics. The instantaneous comparison of three inputs in a hybrid comparator is a technique now applied with a new mode of relay circuitry. The output circuit utilizes IC operational amplifier and tntegrator. The circuit details are shown and discribed. In addition a comprehensive theoretical basis for the conic characteristics is presented in appendix. Static and dynamic test results are also furnished.

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India, IEE-IERE Proceedings -  (Volume:14 ,  Issue: 5 )