PAR FORM
PAR Status:
06/11/02
Revision of Revision PAR
PAR Approval Date:
06/13/2002
PAR Signature Page on File: Yes
Review of Standards Development Process:
1. Assigned Project Number:
C37.24
2. Sponsor Date of Request:
04/08/2002
3. Type of Document:
No
Guide for
4. Title of Document:
Draft: Guide for Evaluating the Effect of Solar Radiation on Outdoor Metal-Enclosed Switchgear
5. Life Cycle:
Full Use
6. Type of Project:
6a. Is this an update to an existing PAR? Yes
If YES: Indicated PAR number/approval date: C37.24-09/16/1999
If YES: Is this project in ballot now? No
6b. The project is a: Revision of Std.C37.24-1986
7. Contact Information of Working Group:
Name of Working Group (WG):
C37.24
Name of Working Group Chair:
Dave Gohil
Telephone: 573-642-6811x34
Email:
FAX:
573-642-6844
dgohil@poweraisle.com
8. Contact Information of Official Reporter (If different than Working Group Chair )
Name of Official Reporter:
(if different than WG Contact)
Telephone:
FAX:
Email:
9. Contact Information of Sponsoring Society or Standards Coordinating Committee
Name of Sponsoring Society and Committee: Power Engineering Society/Switchgear
Name of Sponsoring Committee Chair: Roy W Alexander
Telephone: 610-774-4684
Email:
FAX:
610-774-6388
rwalexander@pplweb.com
Name of Liaison Rep.(If different than Sponsor Chair): M. Dean Sigmon
Telephone: 843-665-4144x4707
Email:
FAX:
843-667-5109
michael.d.sigmon@us.abb.com
10. The type of ballot is:
Individual Sponsor Ballot
Expected Date of Submission for Initial Sponsor Ballot: 05/05/2002
11. Fill in Projected Completion Date for Submittal to RevCom: 9/16/2003
Explanation for Revised PAR that completion date is being extended past the original four-year life of the PAR:
This is a revised PAR but the completion date is not required to be extended.
Only reason for
submitting a revised PAR is to match 'Purpose' of PC37.24/D6 to PAR., First Draft:1999-05-24, Active
People:6, Meeting:2, Frequence of Draft Circulated: 2, Stability of Draft: 100%, Num of Rev: 6,
Project Status: Draft is complete and ready to ballot. Invitation to ballot PC37.24/D6 has already
been sent (on 04-04-2002) by IEEE.
12. Scope of Proposed Project:
The general information in 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. Specific data are given in current
temperature relationship and tabulation form for outdoor metal-enclosed low-voltage power circuit
breaker switchgear, outdoor metal-clad switchgear and outdoor metal-enclosed interrupter switchgear.
13. Purpose of Proposed Project:
Switchgear will perform satisfactorily and have a reasonable life when operated within the
temperature limits estab-lished in ANSI/IEEE C37.20.1, C37.20.2, C37.20.3, C37.21 and C37.23. These
standards specify the temperature rise limits above a standard (maximum) ambient temperature of 40
•C. This is satisfactory for indoor applications where the temperature rise is due entirely to heat
release (internal losses). In outdoor applications, the limiting tem-peratures result from the net
effect of internal losses and external influences, principally the sun, wind and local am-bient
temperatures. All of these must be considered in determining the current-carrying capacity of
outdoor metal-enclosed switchgear.
The magnitude of these factors will vary geographically and
from season to season. The time relationship of maxi-mum circuit loads with respect to maximum
ambient temperature is important. It is not practical to design switch-gear on the basis that all
adverse factors reach their maxima coincident with maximum loads. If this does not occur, full
current ratings may be realized. Recommendations will be made to point out the cumulative effect of
these various influences.
14. Intellectual Property
Sponsor has reviewed the IEEE patent policy with the working group? Yes
Sponsor is aware of copyrights relevant to this project?
Yes
Sponsor is aware of trademarks relevant to this project? Yes
Sponsor is aware of possible registration of objects or numbers due to this project? Yes
15. Are you aware of other standards or projects with a similar scope? No
Similar Scope Project Information:
16. Is there potential for this standard (in part or in whole) to be submitted to an international organization for review/ adoption?
Do Not Know
If yes, please answer the following question:
Which International Organization/Committee?
International Contact Information:
17. Will this project focus on Health, Safety or Environmental Issues? No
18. Additional Explanatory Notes:(Item Number and Explanation)
Item 6 (Reason for revising PAR): To match the 'Purpose' stated in PC37.24/D6 to PAR.
This
unintentional inconsistency has been communicated to Jodi Haasz.
Signature page is transmitted to
Jodi Haasz by fax (208-460-5300).