Hi Curt:
A quick Google search comes up with a lot of manufacturers'
data curves:
http://www.accontrols.com/Typical%20Circuit%20Breaker%20Trip%20Curve.pdf
http://ecatalog.squared.com/pubs/Ci
cuit%20Protection/Molded%20Case%20Circu
t%20Breakers/Thermal%20Magnetic%20Molde
%20Case%20Circuit%20Breakers/FA-FC-FH/0600DB0105.pdf
One of these references suggests UL 489 is one "basic"
standard for circuit breakers:
http://ulstandardsinfonet.ul.com/tocs/tocs.asp?doc=s&fn=0489.toc
http://literature.rockwellautomatio
.com/idc/groups/literature/documents/td/1489-td001_-en-p.pdf
http://aero-defense.ihs.com/document/abstract/BXHHFBAAAAAAAAAA
Here is a comparison between UL 489 and ANSI C37:
http://ecatalog.squared.com/pubs/Ci
cuit%20Protection/Low%20Voltage%20Power
20Circuit%20Breakers/Masterpact%20NT%20
L%201066-ANSI%20Circuit%20Breakers/0613DB9902.pdf
Here is some explanatory material:
http://www.gcf-inc.com/GCF_Explains_UL_489.pdf
Hope these references answer your questions.
Good luck!
Rich
-----Original Message-----
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Bender,
Curtis
Sent: Friday, August 21, 2009 1:54 PM
To: emc-p...@ieee.org
Subject: Standard for AC breaker trip curve - [safety]
Greetings members.
Can someone point me to the “basic” standard that would be the
foundation
for household circuit breaker trip curves? 120V (North America) and 230V
(Internationally) specifically. I saw on one curve the NEMA AB-2 which does
not exist on the NEMA site.
Typical abnormals in UL standards are done at the points listed below
which
seems to indicate where the curve would need to safely reside.
110% - 7 hours
135% - 1 hour
200% - 2 minutes.
Can one of you fine people refer me to where the requirement(s) would
come
from? NEMA, IEC, NEC LMNOP?
Curt
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the list, send your e-mail to
<emc-p...@ieee.org>
All emc-pstc postings are archived and searchable on the web at
http://www.ieeecommunities.org/emc-pstc
Graphics (in well-used formats), large files, etc. can be posted to that URL.
Website: http://www.ieee-pses.org/
Instructions: http://listserv.ieee.org/request/user-guide.html
List rules: http://www.ieee-pses.org/listrules.html
For help, send mail to the list administrators:
Scott Douglas <emcp...@socal.rr.com>
Mike Cantwell <mcantw...@ieee.org>
For policy questions, send mail to:
Jim Bacher <j.bac...@ieee.org>
David Heald <dhe...@gmail.com>
