PSNet Richard Hughes is looking for information on mains transients...
Several sources of information are: 1) 'IEEE Recommended Practice on Surge Voltages in Low-Voltage AC Power Circuits' , 1991, IEEE 1. Transients (Electricity) 2. Electric Circuits - Alternating Current 3. Electric power systems - Protection; ISBN 1-55937-130-7 Abstract: A practical basis is provided for the selection of voltage and current tests to be applied in evaluating the surge withstand capability of equipment connected to utility power circuits, primarily in residential, commercial, and light industrial applications. The recommended practice covers the origin of surge voltages, rate of occurrence and voltage levels in unprotected circuits, waveshapes of representative surge voltages, energy, and source and impedance. three locations categories are defined according to their relative position from the building service entrance. For each category, representative waveforms of surge voltages and surge currents are described, organized in two recommended 'standard waveforms; and three suggested 'additional waveforms'. Keywords: acpowr circuits, current tests, surge monitoring, surge test waveforms, surge voltages, surges, test waveforms, voltage tests, wave shape. Contents: 1. Scope 2. How to Use This Document 3. Definitions 4. References 5. The Origins of Surge voltages 6. Summary of Data Base 7. Recommended Selection of Representative Surges 8. Recommended Planning for Surge Immunity 9. Definition of Standard surge-Testing Waveforms 10. Definition of Additional Sruge-Testing Waveforms 2) 'Electrical Transients in Power Systems' by Allan Greenwood, John Wiley & Sons, 1991 1. Transients (Electricity) 2. Electric power system stability. ISBN 0-471-62058-0 Contents: 1. Fundamental Notions about Electrical Transients 2. The Laplace Transform Method of Solving Differential Equations 3. Simple Switching Transients 4. Damping 5. Abnormal Switching Transients 6. Transients in Three-Phase Circuits 7. Transients in Direct Current Circuits, Conversion Equipment and Static VAR Controls 8. Electromagnetic Phenomena of Importance Under Transient Conditions 9 Traveling Waves and Other Transients on Transmission Lines 10. Principles of Transient Modelling of Power Systems and Components 11. Modeling Power Apparatus and the Behavior of Such Equipment Under Transient Conditions 12. Computing Aids to the Calculation of Electrical Transients 13. System and Component Parameter Values for Use use Transient Calculation and Means to Obtain Them by Measurement 14. Lightning 15. Insulation Coordination 16. Protection of Systems and Equipment Against Transient Overvoltages 17. Case Studies in Electrical Transients 18. Equipment for Measuring Transients 19. Measuring Techniques and Surge Testing 3) 'Lightning and Lightning Protection' by Hart, William C and Malone, Edgar W, 1979/1988; published by Don White Consultants, Inc/ Interference Control Technologies, Inc, Route 625, Gainesville, VA 22065, USA; ISBN 0-9322263-14-3 Contents 1. The Lightning Phenomena 2. Lightning Fundamentals 3. Protection Techniques 4. Design Verification 5. Maintenance of Protection Devices 6. Progress in Lightning and Lightning Protection Research 4) 'IEEE Recommended Practice for Powering and Grounding Sensitive Electronic Equipment', IEEE std 1100-1992, published by the IEEE 345 East 47th St, NY, NY 100017-2394, USA; ISBN 1-55937-231-1 Abstract: Recommended design, installation, and maintenance practices for electrical power and grounding (including both power-related and signal-related noise control) of sensitive electronic processing equipment used in commercial and industrial applications are presented. The main objective is to provide a consensus of recommended practices in an area where conflicting information and confusion, stemming primarily from different view points of the same problem, having dominated. Practices herein address electronic equipment performance issues while maintaining a safe installation A brief description is given of the nature of power quality problems, possible solutions, and the resources available for assistance in dealing with problems. Fundamental concepts are reviewed. Instrumentation and procedures for conducting a survey of the power distribution system are described. Site surveys and site power analysis are considered. Case histories are given to illustrate typical problems. Keywords: commercial applications, electrical power, grounding, industrial applications sensitive equipment. Contents: 1. Introduction 2. Definitions 3. General Needs Guidelines 4. Fundamentals 5. Instrumentation 6. Site Surveys and Site Power Analyses 7 Case Histories 8. Specification an Selection of Equipment and Materials 9. Recommended Design and Installation Practices Additionally, the GE product handbook for their protective devices has, historically, provided quite a bit of practical information. Other device manufacturers should be able to provide similar information. Hope this helps, Richard... - - - - - Peter E Perkins Principal Product Safety Consultant Tigard, ORe 97281-3427 +1/503/452-1201 phone/fax p.perk...@ieee.org email visit our website: http://ourworld.compuserve.com/homepages/peperkins - - - - -