การออกแบบและสร้างเครื่องหาตำแหน่งฟอลต์ของสายเคเบิลแรงสูง โดยใช้วิธีการสะท้อนของคลื่น / อรุณชัย วงศ์วิศาลศรี = Design and construction of a pulse-echo cable fault locator / Arunchai Wongwisansri
This thesis presents the design and construction of a fault Locator equipment for locating a faulty point in a high voltage cable by means of pulse-echo techniques. It is developed for determining the distance of fault in high voltage cable, which can be represented as a Transmission Line in the electric distributed system. The distance between the fault and the end of cable must be longer than the width of pulse, i.e. 1 us. This equipment could locate both permanent and nonpermanent faults which consist of either the short-circuit or the open-circuit faults. The uncertainty in locating fault is c.a. 2-5 %.