S E R I E S 61000 SYSTEM AnswerModule® Sag Direction Diagnose and locate RMS Voltage sag sources Voltage sags traditionally have been a power quality manager’s biggest headache, with even a small sag capable of causing hours of downtime or a substantial loss of product. Today, that headache has grown even larger. With computers integrated into virtually all energy-dependent operations, even the smallest disruption in power can produce problems. Voltage sags can be caused by faults on the power system or by internal events, such as the start-up of large loads. Knowing the location of the fault — either inside the facility or in the distribution network of the power supplier — is the starting point to resolving the problem and protecting your operation quickly and cost-effectively. Quickly detect, identify, locate The RMS Voltage Sag Directivity AnswerModule arms you with the ability to identify and locate the problem. The AnswerModule detects a voltage sag event, identifies its characteristics, and determines the direction of its location relative to the monitoring point. Located within the Encore® Series Software, the RMS Voltage Sag Directivity Answer Module enables power customers to quickly determine whether the fault occurred upstream or downstream of the monitoring point. The AnswerModule is invoked when both waveform and RMS records of the event are present. Using proprietary techniques, the AnswerModule compares RMS magnitudes computed from both current and voltage waveforms, tracking positive sequence phase angle changes from pre-fault to post-fault. Based on this data, the characteristics and direction of the fault are determined. S E R I E S 61000 SYSTEM Use your Internet browser to Examine the details of each RMS Voltage sag and share the graphs In real time with colleagues and customers The RMS Voltage Sag Directivity AnswerModule provides information about the severity and characteristics of the sag and indicates the direction of the sag relative to the monitoring point. Specifications for RMS Voltage Sag Directivity Answer Module Software Operating environment: Applications: Installed in any Encore® Series Software Nearly any monitoring application where the source Supports three-phase wye and delta configurations. of the sag needs to be identified to determine the cause and prevent future occurrence. Input data: Algorithms: Accepts waveform data from any DataNode Proprietary algorithms utilizing voltage and current that provides greater than 64 samples/cycle for sequence phase angle information, and expert 3-phase voltages and current. RMS data must knowledge. also be present. Output information: Voltage sag event identified. Direction (upstream, downstream) to the sag source identified relative to monitored point. ©2007 Dranetz-BMI and Electrotek Concepts. All rights reserved. Printed in the United States. Specifications subject to change without notice. Encore®, AnswerModule®, DataNode®,and InfoNode®, are trademarks of Dranetz-BMI and Electrotek Concepts. 10.13.07