S E R I E S 61000 SYSTEM TM AnswerModule® Radial Fault Locator Estimate distance to fault locations Managers of power distribution systems know the importance of maintaining system integrity. With hundreds or thousands of miles of line to maintain, they know that the conventional approach of sending linemen out to find faults is time consuming and expensive. Radial distribution feeders are susceptible to various short-circuit events such as symmetrical faults (three phase) and unsymmetrical faults including single-line-to-ground, double-line-to-ground, and line-to-line faults. These system faults can arise from causes such as severe lightning and wind, animal contacts, traffic accidents, or utility equipment failure. Reduces time spent physically inspecting power lines Quickly identifying the source and location of faults is the key to cost-efficient system maintenance. But there was no power quality monitoring instrument available to replace tried-and-true method of “flying the lines,” a physical inspection of power lines. Until now. Installed into Encore Series Software at a power substation , the Radial Fault Locator Answer Module employs a proven algorithm to calculate the distance from the substation to the identified fault source. The software identifies the type of fault and estimates the distance from the substation to the fault providing answers quickly and accurately. Accessible from the web browser of any computer, the data generated by the Radial Fault Locator AnswerModule allows managers to immediately dispatch linemen to the location of the fault, saving time and money and getting power restored quickly. The Radial Fault Locator AnswerModule is a software package that can be installed remotely, immediately providing valuable information for decision-making. 61000 SYSTEM TM S E R I E S Specifications for Radial Fault Locator AnswerModule Software Operating environment: Applications: Installed in any InfoNode® Estimates distance to fault location from monitored or Encore Series Software. point (usually at the substation). Supports three- phase wye and delta configurations. Accuracy error depends on accuracy of sequence impedance. Input data: Typical error 10-15% when reasonably accurate sequence impedances supplied. Accepts low-frequency transient waveform data from any Datanode that provides greater than 64 samples/ Algorithms: cycle for 3-phase voltages and currents. Setup inputs Based on apparent sequence impedance computed are ground pickup current, phase pickup current, ratio at the monitoring point. Impedance to the fault of fault peak current to pre-fault peak current, location is estimated sequence impedance unit (positive and zero) Output information: Fault event identified, fault type identified: three- phase-to-ground, double-line-to-ground, single-line- to-ground faults. Distance to fault location from monitoring point estimated. ©2007 Dranetz-BMI and Electrotek Concepts. All rights reserved. Printed in the United States. Specifications subject to change without notice. AnswerModule®, DataNode®,and InfoNode®, are trademarks of Dranetz-BMI and Electrotek Concepts.