Low-Voltage
Switchgear Devices Subcommittee (LVSD)
Scope:
Treatment of
all matters relating to low voltage devices (1000 volts
ac, 3200 volts dc and below), such as low voltage power circuit
breakers,
fusible switching devices, and other low voltage power switching
devices,
except molded case circuit breakers and network protectors, for use in
switchgear assemblies or in individual enclosures for separate mounting.
Chairman: Doug
Edwards,
PE
Siemens Power Transmission and Distribution, Inc.
Standards
Covered by this Subcommittee:
|
Standard |
Title |
Status |
Contact |
|
C37.13 -1990 |
Standard
for Low-Voltage AC Power Circuit Breakers Used in Enclosures |
PAR |
|
|
PC37.13.1-2006 |
Standard
for Definite Purpose Switching Devices Used in Metal Enclosed
Low-Voltage Power Circuit Breaker Switchgear |
Current Next action 2011 |
|
|
C37.14 -2002 |
IEEE
Standard for |
WG formed (joint
WG with IEEE/VT. PAR in process |
|
|
C37.16 -2000 |
Preferred
Ratings, Related Requirements, and Application Recommendations for
Low-Voltage AC (635V and below) and DC (3200V and below) Power Circuit
Breakers |
PAR Valid till 31
Dec. 2010 |
|
|
C37.17-1997 |
Standard
for Direct-Acting Trip Systems for Low-Voltage (up to 635 V) AC and General Purpose
Low Voltage (up to 325 V) DC Power Circuit Breakers |
PAR Valid till 31
Dec. 2009 |
|
|
C37.18-1979
(2003) |
IEEE Standard Enclosed Field Discharge
Circuit Breakers for Rotating Electric Machinery |
Current Next action 2008 |
|
|
C37.26 -2003 |
IEEE Guide for Methods of Power Factor
Measurements for Low Voltage Inductive Test Circuits |
Current Next action 2008 |
|
|
C37.27-1987
(1998) |
Application
Guide for Low-Voltage AC Power Circuit Breakers Applied With Separately
Mounted Current-Limiting Fuses |
PAR |
|
|
C37.29-1981
(1985) |
Standard
for |
Withdrawn |
Current LVSD
Subcommittee Activities:
C37.13 working group (Standard for Low-Voltage AC Power Circuit Breakers Used in Enclosures)
Standard is in balloting process. Draft 21 ballot headed to ballot (Fall 2007). The major issues most recently addressed in the latest draft and ballots include:
· dual 50/60 Hz ratings and applicable tests requirements
· coordination with C37.50 – Switchgear Low Voltage AC Power Circuit Breakers Used in Enclosures – Tests Procedures
· coordination with revisions to C37.27 – LV AC Non-integrally Fused Power Circuit Breakers
Spring 2008 meeting should target review of ballot comments.
PC37.13.1
(Standard for
Definite Purpose Switching Devices Used in Metal Enclosed Low-Voltage
Power
Circuit Breaker Switchgear)
No current activity.
C37.14
working group (IEEE Standard for
The WG has joint sponsorship with Vehicular Technology committee. Initial meetings target discussing the review of transit industry changes in the last 5 years or so and coordination with C37.16, C37.17, C37.20.1 and C37.20.8 (pending standard for DC Switchgear).
C37.16
working group (Preferred Ratings, Related
Requirements, and Application Recommendations
for Low-Voltage AC (635V and below) and DC (3200V and below) Power
Circuit
Breakers)
From the fall 2007
The spring 2008 meeting should target review of balloted document.
C37.17
working group (Standard for Direct-Acting Trip
Systems for Low-Voltage (up to 635
V) AC and General Purpose Low Voltage (up to
325 V) DC Power Circuit Breakers)
WG is going to revisions for the update the terminology or technology currently in use in the industry. Bringing the standard up-to-date, to reflect current practice as well as to retain important historical information will require general revisions to reflect the capabilities of modern electronic tripping systems. These modern systems may have extended capabilities compared to historic systems. In addition, changes to the requirements must be coordinated with changes to related standards, including C37.13, C37.27, C37.16, and C37.14, which are presently under revision or on which revision efforts may begin shortly.
C37.18
(IEEE Standard Enclosed Field
Discharge Circuit Breakers for Rotating Electric Machinery)
No current activity.
Next action is due in 2008.
C37.26
(IEEE Guide for Methods of Power
Factor Measurements for Low Voltage Inductive Test Circuits)
No current activity. Next action is due in 2008.
C37.27 working group (Application
Guide for Low-Voltage AC Power Circuit Breakers Applied With
Separately Mounted Current-Limiting Fuses)
Standard is in balloting process. Draft 15 ballot headed to ballot (Fall 2007). The major issues most recently addressed in the latest draft and ballots include:
· Revisions to the Figure 1 and the coordination with the rated short-circuit current and the peak let-through current of the current-limiting fuses.
Spring 2008 meeting should target review of ballot comments.
C37.29
(Standard for
This
standard was administratively withdrawn by the Standards Board on
December 7,
2005.
For more
detailed current information on the LVSD Subcommittee, please
see the
Minutes of the Meetings (Archives) on the Home Page.
Go back to PES
Switchgear
Committee Home Page.
Last updated:
October 23, 2007