Switchgear
Assemblies Subcommittee
Scope:
Treatment of all
matters relating to Switchgear Assemblies.
Chairman: Jim E. Smith.
1000 Charrington Parkway
USA
Standards
Covered by this Subcommittee:
|
Number |
Title |
Status |
Contact |
|
C37.20.1 2002(R2007) |
Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear |
Current |
Chair: |
|
C37.20.1a 2005 (R2007) |
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 (To be
incorporated into C37.20.1) |
Chair: |
|
C37.20.1b 2006 (R2007) |
Metal-Enclosed Low-Voltage Power Circuit Breaker Switchgear --
Amendment 2: Additional Requirements
for Control and Auxiliary Power Wiring in DC Traction Power Switchgear |
Current (To be
incorporated into C37.20.1 or C37.20.8) |
Chair: |
|
C37.20.2 1999 (R2004) |
Metal-Clad Switchgear |
Revision begun May-2006 |
Chair: |
|
C37.20.3 2001 (R2006) |
Metal-Enclosed Interrupter Switchgear |
Revision begun May-2007 |
Chair: |
|
C37.20.4 2001 (R2006) |
Indoor AC Medium Voltage Switches for Use in Metal-Enclosed
Switchgear |
Revision begun May-2007 |
Chair: |
|
C37.20.6 2007 |
4.76
kV to 38 kV Rated Grounding and Testing Devices Used in Enclosures |
Current |
Contact: |
|
C37.20.7 2007 |
Guide
for Testing Medium-Voltage Metal-Enclosed Switchgear for Internal Arcing
Faults |
PAR requested Revision to start |
Chair: |
|
C37.20.7 corr 1 |
Guide
for Testing Medium-Voltage Metal-Enclosed Switchgear for Internal Arcing
Faults Corrigendum1 |
Current (To be
incorporated into C37.20.7) |
Chair: |
|
C37.20.8 |
Metal-Enclosed
Low-Voltage DC Traction Power Switchgear |
New project PAR
3/2009 Revision begun |
Chair: |
|
C37.21 2005 (R2010) |
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 (R2008) |
Metal-Enclosed Bus |
Task Force
Forming |
Contact: E. Peters |
|
C37.24 2003 (R2008) |
Guide for Evaluating the Effect of Solar Radiation on Outdoor
Metal-Enclosed Switchgear |
Current |
Contact: L. Farr |
|
C37.59 2007 |
Requirements
for Conversion of Power Switchgear Equipment |
Current |
Chair: |
|
C37.81 1989 (R2005) |
Seismic Qualification of Class 1E Metal-Enclosed Power
Switchgear Assemblies |
Current |
Contact: |
|
C37.82 1983 (R2004) |
Qualification of Switchgear Assemblies for Class 1E Applications
in Nuclear Power Generating Stations |
Current |
Contact: |
|
C37.121 1989 (R2000,R2006) |
Unit Substations |
Draft Out for
ballot 9/2011 |
Contact: |
Current Switchgear Subcommittee Activities:
C37.20.1/C37.20.8 (LV
metal-enclosed switchgear)
Chair: T. A. Burse
(for revision project)
Working group will be formed soon for revision of C37.20.1 to incorporate the contents of amendments 1a and 1b. Continuing discussions on developing new standard for DC Traction (C37.20.8) and possible impact on other non-general-purpose LV DC switchgear.
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 working groups (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 (MV
ground & test devices)
This Standard covers draw-out type, indoor medium-voltage grounding and testing devices for use in drawout metal-clad switchgear. The devices are generally supplied for temporary circuit maintenance procedures. No current activity.
C37.20.7 (Arc
resistant LV and MV switchgear)
Chair: M. Wactor
This Standard establishes methods by which metal-enclosed switchgear may be tested for resistance to the effects of arcing due to an internal fault. Corrigendum 1 was approved in 2010 to resolve issues with low voltage arcing tests. A PAR is being requested to revise this document to reflect lessons learned since approval of the 2007 edition.
C37.21 (Control
switchboards)
This Standard covers ratings, construction and testing of dead-front control switchboards. This standard was reaffirmed in 2010. No current activity.
C37.23 (Metal-enclosed
bus)
Chair: E. Peters, Vice Chair: T. Hawkins
This Standard covers assemblies of metal-enclosed conductors along with associated interconnections, enclosures, and supporting structures. A PAR will be requested and a Working Group formed to address adding cable back into the document, coordinate with C37.100.1 – 2007 (Common Clauses for Power Switchgear) and other issues.
C37.24 (Solar
radiation on outdoor metal-enclosed switchgear)
Chair: L. Farr
This Guide is intended to assist in evaluating the effect of solar radiation on outdoor metal-enclosed switchgear and is applicable to outdoor metal-enclosed power switchgear, control switchboards, and metal-enclosed bus. Interest has been expressed by IEC countries to include international examples in this document. This possibility is being explored.
C37.59 (Conversions
of power switchgear)
This Standard provides direction and guidance in converting power switchgear equipment from a qualified design. The document is sponsored by ADSCOM, with joint participation by the Switchgear Assemblies, Low Voltage Switchgear Devices, and High Voltage Circuit Breakers subcommittees. No current activity.
C37.81 (Seismic
qualification of class 1E switchgear)
This Guide 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 several years. No current activity.
C37.82 (Qualification
of switchgear for class 1E service in nuclear power stations)
This Standard 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 a revision effort may be necessary in the next several years. No current activity.
C37.121 working
group (Unit substations)
Chair: J. Smith, Vice
Chair: D. Edwards
This Standard 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. A revision is out for ballot.
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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Switchgear Committee Home Page.
Last updated: November, 2011