The IEEE Standards Association (IEEE-SA) has approved the revised standard for power distribution reliability indices and the start of a new standard project for the application of harmonic limits to power standards. IEEE-SA also approved the start of revision projects to four power standards and reaffirmed the continued use of five existing ones.
The approved revised standard, IEEE 1366, Guide for Electric Power Distribution Reliability Indices, identifies useful reliability indices for distribution systems, substations, circuits and defined regions, as well as the factors that affect their calculation. The updated standard provides definitions that allow better comparisons among utilities.
The new standard project, IEEE P519.1, Guide for Applying Harmonic Limits on Power Systems, will help utilities and building owners develop and implement harmonic limits in electric power systems. It will provide application examples and procedures for controlling harmonics on power systems and recommend limits for customer harmonic injection and overall power system harmonic levels.
The IEEE-SA also approved the start of work to revise the following existing standards:
- IEEE P334, Standard for Qualifying Continuous Duty Class 1E Motors
- IEEE P603, Standard Criteria for Safety Systems for Nuclear Power Generating Stations
- IEEE PC57.12.60, Standard Test Procedure for Thermal Evaluation of Insulation Systems for Dry Type Power and Distribution Transformers, Including Ventilated, Solid-Cast and Resin Encapsulated Transformers
- IEEE P142, Recommended Practice for Grounding of Industrial and Commercial Power Systems PAR for Revision.
In addition, IEEE-SA reaffirmed the continued use of five standards:
- IEEE 317-1983, (PE/NPE) IEEE Standard for Electric Penetration Assemblies in Containment Structures for Nuclear Power Generating Stations
- IEEE 1204-1997, IEEE Guide for Planning DC Links Terminating at AC Locations Having Low Short-Circuit Capacities
- IEEE 1375-1998, IEEE Guide for the Protection of Stationary Battery Systems
- IEEE C57.19.100-1995, IEEE Guide for Application of Power Apparatus Bushings
- IEEE 1043-1996, IEEE Recommended Practice for Voltage-Endurance Testing of Form-Wound Bars and Coils.
The IEEE-SA has also approved a new standard for surge protective equipment for ac rotating machinery rated at 1 kV or greater as well as the start of work on new standards for: distribution and power external fuses; high-voltage, current-limiting motor-starter fuses; and automatic circuit reclosers and fault interrupters. IEEE C62.21, Guide for the Application of Surge Voltage Protective Equipment on AC Rotating Machinery 1000 Volts and Greater, concerns equipment such as surge arrestors, capacitors, resistors, inductors, and cable and conduit grounding used to protect ac motors and generators rated at 1000 V or more in electric utility systems. It incorporates recent knowledge about insulation and other materials and the response of machine windings to voltage surges.
The new standards include:
IEEE PC37.43, Standard Specifications for High-Voltage Expulsion,
- Current-Limiting and Combination Type Distribution and Power Class External Fuses, with Rated Voltages from 1 through 38 KV, Used for the Protection of Shunt Capacitors
.
This standard will set specifications for protecting shunt capacitors complying with IEEE 18 and NEMA CP-1 through the use of high-voltage (above 1 kV) distribution and power class expulsion, current-limiting and combination external capacitor fuses, and accessories on ac systems.
- IEEE PC37.53.1, Standard Conformance Test Procedures for High-Voltage Current-Limiting Motor-Starter Fuses With Rated Voltages from 1 Through 38 kV.
This standard will bring ANSI C37.53.1-1989 in line with current requirements for high-voltage switches. It will cover conformance test procedures for ac high-voltage motor-starter fuses used as backup, current-limiting fuses with high-voltage Class E2 motor starters.
- IEEE PC37.602003/Cor 1-200x, Standard Requirements for Overhead Pad-Mounted, Dry Vault, and Submersible Automatic Circuit Reclosers and Fault Interrupters for Alternating Current Systems Up to 38 kV.
This corrects editorial and technical errors this standard before it is submitted to the IEC for dual logo status.
IEEE-SA also reaffirmed IEEE C37.11-1997, IEEE Standard Requirements for Electrical Control for AC High-Voltage Circuit Breakers Rated on a Symmetrical Current.
Electrical Safety
Standards Brochure
A new brochure describes the IEEE Electrical Safety Resource Center, a Web site offering current information on electrical safety standards, meetings, and best practices. The site, http://standards.ieee.org/esrc , provides access to IEEE's electrical safety standards and the activities of its committees and standards working groups involved in electrical safety. It also includes related information from other organizations and electrical safety case studies and news. The brochure lists electrical safety standards available through the IEEE, including the 12 Industry Application Society (IAS) Color Books Standards for Industrial and Commercial Power Systems and the National Electrical Safety Code. For a copy of the IEEE Electrical Safety Resource Center brochure, contact: IEEE Standards Association, 445 Hoes Lane, Piscataway, NJ 08855. Phone: +1 732 562 6381. e-mail s.kolachina@ieee.org..
