PISCATAWAY, N.J., USA, 19 January 2006 The IEEE has approved three revised
electric power-related standards for ac interrupter switches, secondary network
protectors and low-voltage surge protectors. It also has begun work on new standards
for high-voltage circuit breakers and low-voltage power circuit breaker switchgear,
as well as revisions to standards for high-voltage power circuit breakers, grounding
devices, and neutral grounding in electrical utility systems.
The revision
of IEEE 1247(TM), “Standard for Interrupter Switches for Alternating Current,
Rated Above 1000 Volts”, corrects technical errors in this document, which
covers the basic requirements of ac switching devices, interrupters and interrupter
switches used indoors, outdoors and in enclosures.
IEEE C57.12.44(TM),
“Standard Requirements for Secondary Network Protectors”, was updated.
This standard addresses the performance, safety, and electrical and mechanical
interchangeability of the low-voltage (600 V and below) network protectors that
automatically connect and disconnect network transformers from secondary spot
or grid networks.
IEEE C62.42(TM), “Guide for the Application of Component
Surge-Protective Devices for Use in Low-Voltage (Equal to or Less Than 1000 Vrms
or 1200 Vdc) Circuits”, was expanded to include component varistors and avalanche
junction semiconductor surge-protective devices. The prior version had only included
component air gap and gas tube surge protective devices.
Work was begun
on IEEE PC37.09b(TM), “Standard Test Procedure for AC High-Voltage Circuit
Breakers Rated on a Symmetrical Current Basis -- Amendment 2: Transient Recovery
Voltage Requirements During Power Tests”. This amendment will revise transient
recovery voltage (TRV) requirements for power tests in order to coordinate the
standard with revisions to IEEE C37.04(TM) and to harmonize IEEE TRV requirements
during power tests with those in IEC 62271-100.
Work was also begun on IEEE
PC37.20.1b(TM), “Standard for Metal-Enclosed Low-Voltage Power Circuit Breaker
Switchgear -- Amendment 2: Additional Requirements for Control and Auxiliary Power
Wiring in dc Traction Power Switchgear”. This amendment will address input
on the standard from users, specifiers and manufacturers of dc traction power
switchgear. Rectifier substations incorporating such switchgear supply power for
rail transportation.
The IEEE has also begun to revise three standards: ·
IEEE PC37.17(TM), “Standard for Trip Systems for AC and General Purpose DC
Low Voltage Power Circuit Breakers”. The revision will bring this document,
which was transferred from NEMA to IEEE in 2002, into compliance with formatting
requirements of IEEE standards. It also will be updated to reflect current practice. ·
IEEE PC37.20.6(TM), “Standard for 4.76 kV to 38 kV Rated Grounding and Testing
Devices Used in Enclosures”, covers indoor, medium-voltage grounding and
testing devices used in drawout, metal-clad switchgear. The standard will be revised
to reflect changes in related standards and current practice and expanded to include
devices having circuit breaker characteristics. · IEEE PC62.92.4(TM),
“Guide for the Application of Neutral Grounding in Electrical Utility Systems,
Part IV – Distribution”, provides definitions and practices for grounding
of single- and three-phase ac electric utility primary distribution systems with
nominal voltages in the range of 2.4 kV to 34.5 kV.
The above standards
are sponsored by the IEEE Power Engineering Society.
About the
IEEE Standards Association The IEEE Standards Association, a globally
recognized standards-setting body, develops consensus standards through an open
process that brings diverse parts of an industry together. These standards set
specifications and procedures based on current scientific consensus. The IEEE-SA
has a portfolio of more than 870 completed standards and more than 400 standards
in development. For information on IEEE-SA see: http://standards.ieee.org/.
About
the IEEE The IEEE has more than 375,000 members in approximately 150 countries.
Through its members, the organization is a leading authority on areas ranging
from aerospace, computers and telecommunications to biomedicine, electric power
and consumer electronics. The IEEE produces nearly 30 percent of the world's literature
in the electrical and electronics engineering, computing and control technology
fields. This nonprofit organization also sponsors or cosponsors more than 300
technical conferences each year. Additional information about the IEEE can be
found at http://www.ieee.org/.
