Switchgear
Assemblies Subcommittee
Scope:
Treatment of all
matters relating to Switchgear Assemblies.
Chairman:
T. W.
Olsen
PO Box
29503
Raleigh,
NC
27626
USA
Standards
Covered by this Subcommittee:
|
Number |
Title |
Status |
Contact |
|
C37.20.1 2001 |
Metal-Enclosed
Low-Voltage Power Circuit Breaker Switchgear |
Current Reaffirmation
on RevCom agenda for
Sept 2007 |
Contact: |
|
C37.20.1a 2005 |
Metal-Enclosed
Low-Voltage Power Circuit Breaker Switchgear -- Amendment 1: Short-Time
and Short-Circuit Withstand Current Tests; Minimum Areas for Multiple
Cable Connections |
Current (see
C37.20.1 status) |
Chair: |
|
C37.20.1b 2006 |
Metal-Enclosed
Low-Voltage Power Circuit Breaker Switchgear -- Amendment 2: Additional Requirements
for Control and Auxiliary Power Wiring in DC Traction Power Switchgear |
Current (see
C37.20.1 status) |
Chair: |
|
C37.20.2 1999
(R2004) |
Metal-Clad Switchgear |
Current Revision
begun 05-2006 |
Chair: |
|
C37.20.3 2001
(R2006) |
Metal-Enclosed
Interrupter Switchgear |
Current Revision
begun 05-2007 |
Chair: |
|
C37.20.4 2001
(R2006) |
Indoor AC Medium
Voltage Switches for Use in Metal-Enclosed Switchgear
|
Current Revision
begun 05-2007 |
Chair: |
|
C37.20.6 1997 |
4.76
kV to 38 kV Rated Grounding and Testing Devices Used in Enclosures |
PAR
approved 12-2005 Valid
to 12-2009 D1.0
ballot closes 08-18-2007 |
Chair: |
|
C37.20.7 2001 |
Guide
for Testing Medium-Voltage Metal-Enclosed Switchgear for Internal
Arcing Faults |
PAR
approved 11-2004 Valid
to 12-2008 On
RevCom agenda for
Sept 2007 |
Chair: |
|
C37.20.8 |
Metal-Enclosed
|
New
project |
Chair: |
|
C37.21 2005 |
Control Switchboards |
Current |
Contact: |
|
C37.22 1997 (R2003) |
Preferred Ratings and
Related Required Capabilities for Indoor AC Medium-Voltage Switches
Used in Metal-Enclosed Switchgear |
Current To
be merged into C37.20.4 See
C37.20.4 status |
Contact: |
|
C37.23 2003 |
Metal-Enclosed Bus |
Current Reaffirmation
needed in 2008 |
Contact: |
|
C37.24 2003 |
Guide for Evaluating
the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear |
Current Reaffirmation
needed in 2008 |
Contact: |
|
C37.59 2002 |
Requirements
for Conversion of Power Switchgear Equipment |
PAR
approved 09-2004 Valid
to 12-2008 Revision
in process First
ballot 04-2007 D11
recirculation ballot closes 08-08-2007 |
Chair: |
|
C37.81 1989 (R2005) |
Seismic Qualification
of Class 1E Metal-Enclosed Power Switchgear Assemblies |
Current Revision
needed |
Contact: |
|
C37.82 1983 (R2004) |
Qualification of
Switchgear Assemblies for Class 1E Applications in Nuclear Power
Generating Stations |
Current Revision
needed |
Contact: |
|
C37.121 1989 (R2000) |
Unit Substations |
Current Reaffirmed
11-16-2006 |
Contact: |
Current Switchgear Subcommittee
Activities:
C37.20.1
(
Chair: T. A.
Burse
(for revision project)
No present activity. Reaffirmation submitted to RevCom for Sept 2007 action. Following reaffirmation, a working group for revision of C37.20.1 to incorporate the content of amendments 1 and 2, and to consider other desirable revisions, is expected to begin. A task force reviewed low-voltage dc traction power switchgear (3200Vdc and below), and determined that a separate standard for this class of equipment is needed (C37.20.8 designation reserved).
C37.20.1a
Amendment 1 working group (
Chair: T. A.
Burse
This document was approved by the IEEE-SA 9-2005, and by ANSI 12-2005. This working group has been disbanded.
C37.20.1b Amendment
2 working group (
Chair: T. A. Burse
This document was approved by the IEEE-SA 12-2006 and by ANSI 04-2007. This working group has been disbanded.
C37.20.2 working
group (MV metal-clad switchgear)
Chair: M. Wactor
The working group for revision of the 1999 document began work in 05-2006. The revisions will include reorganization to coordinate with C37.100.1-2007 (Common Clauses for Power Switchgear). This will allow elimination of large portions of text for common subjects (e.g. procedures for continuous current tests) from the metal-clad switchgear document, simplifying future maintenance.
C37.20.3
/
C37.20.4 / C37.22 (MV load interrupter switchgear and switches)
Chair: C. Ball
These three documents are related, with C37.20.3 covering metal-enclosed load interrupter switchgear, C37.20.4 covering the switch used in C37.20.3 switchgear, and C37.22 listing the preferred ratings of the C37.20.4 switches. The working groups for revision of these documents began work 05-2007. The revisions will include reorganization to coordinate with C37.100.1-2007 (Common Clauses for Power Switchgear) and with changes in IEEE 1247-2005 (Interrupter Switches for Alternating Current, Rated Above 1000 Volts). As part of the revision effort, the content of C37.22 will be merged into C37.20.4.
C37.20.6
working
group (MV ground & test devices)
Chair: T. A.
Burse
The PAR for this project was approved by IEEE-SA 12-2005, to revise the original 1997 standard to reflect lessons learned in nearly 10 years use of the standard. The working group has reviewed several drafts, and the ballot for D1.0 will close 08-18-2007. The document is being expanded to cover more types of devices, and to include electrically operated devices that may have interrupting capacity.
C37.20.7
working
group (arc resistant
Chair: M. Wactor
The PAR for this project was approved
by IEEE-SA in 11-2004,
to incorporate lessons learned from application of the original 2001
document
for internal arcing tests. The
scope of
the standard has also been extended in this project to cover
C37.20.8
working
group (
Chair: C.
Ross
C37.21
(control
switchboards)
No current activity. This document was approved by the IEEE-SA in 6-2005, and by ANSI in 10-2005. It is expected that reaffirmation will occur in 2010, with a revision effort starting sometime after 2010.
C37.23
(metal-enclosed
bus)
No current activity. This document was substantially revised in the 2003 edition. It is expected that reaffirmation will occur in 2008, with a revision effort starting sometime after 2008.
C37.24
(solar
radiation on outdoor metal-enclosed switchgear)
No current activity. This document was revised in the 2003 edition to reflect modern data on solar radiation. It is expected that reaffirmation will occur in 2008, and that revision efforts will not occur until after 2008.
C37.59
working group
(conversions of power switchgear)
Chair: P.
Dwyer
This standard is sponsored by ADSCOM, with joint participation by the Switchgear Assemblies, Low Voltage Switchgear Devices, and High Voltage Circuit Breakers subcommittees. The PAR for the project was approved in 09-2004, and the first IEEE-SA ballot closed in 04-2007. A recirculation ballot for D11 will close 08-08-2007. Switchgear Assemblies subcommittee members very actively participate in this effort.
C37.81
(seismic
qualification of class 1E switchgear)
This document describes methods by which metal-enclosed power switchgear can be qualified seismically, for use in nuclear power stations. It is also useful for qualification of switchgear for applications other than in nuclear power stations. The document is relatively technology-independent, but recent changes in regulations concerning seismic requirements may necessitate beginning of a revision effort in the next year.
C37.82
(qualification of switchgear for class 1E service in nuclear power
stations)
This document describes methods by which metal-enclosed power switchgear can be qualified for class 1E applications in nuclear power stations. The document is relatively technology-independent, so that the document remains relevant even though it was initially approved many years ago. It is expected that revision effort may be necessary in the next several years.
C37.121
(unit
substations)
This document describes the broad range of configurations for unit substations. A unit substation is a substation consisting primarily of one or more transformers that are mechanically and electrically connected to, and coordinated in design with, incoming and outgoing equipment. The document is technology-independent, so it remains relevant even though it was initially approved many years ago. It is expected that revision effort may be necessary in the next several years only due to the need to reformat the document to present IEEE-SA requirements. The document was reaffirmed by IEEE-SA in 2006.
For more
detailed current information on the Switchgear Assemblies Subcommittee,
please
see the
Minutes of the Meetings (Archives) on the Home Page.
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Last updated:
August 9, 2007