in our products we make extensive use of breakers combined with the on-off
switch
they are exclusively magnetic type
thermal breakers work by temperature effects which arise from the heating
effect of the current. There is an unavoidable time factor involved when the
current must first heat
Hi Everybody:
Because of a need that has come up suddenly, I am looking for a source
of two ISO 3864 symbols in a big hurry. Where can one purchase and
download EPS or similar quality graphics of these symbols? The two I am
looking for are the red circle-slash over the hand (meaning hot
Ran into a similar problem with the thermals - they tripped during the
72 hour 55C operating limit test. Could have gone larger but it had more
problems than fitting in the magnetic units.
Gary
-Original Message-
From: John Juhasz [mailto:john.juh...@ge-interlogix.com]
Hello Doug,
Bose buys many of our standards from ILI in Great Britain (I believe)
http://www.ili-info.com/us/ and we have received some in electronic format.
These sites also seems to offer standards in PDF form and also gives you a
simple free search engine to help you identify and find
RE: Thermal breakers vs magnetic breakers8/7/02
David, One of the reasons they may have been rejected previously is their
change in trip point due to temperature changes. The higher the ambient
temperature gets the lower the trip point of the thermal device becomes. If
Yeah, I had used them . . . once.
As they were a lower cost circuit breaker we spec'd them into a telecom
system. What we didn't think about was the temperature extremes.
For the higher temp tests for NEBS the higher temp breakers
were too large and too expensive - for my management anyway.
I
When I worked on CATV power supplies I had two reasons for using magnetic;
1. Nuisance tripping of thermal breakers during high ambient temperatures
2. Magnetic breakers often carry a higher level of safety rating (UL Listed
vs UL Recognized)than thermal and have higher short circuit maximum
Hello all,
I have been searching for a document service that has electronic format
standards (PDF) for EN61010-1:2001 with fully functional text search. IHS
Global and TechStreet have hardcopy only. BSI offers electronic but it's
only a converted TIFF format. I thought about using the IEC but
All interested -
The IEC has just announced an upcoming on-line IEC 60417
symbol library will be made available soon (I checked and
it's not yet available through the IEC Web Store). Don't
expect to access them gratis, as they once were on the Chiba
University, Ikeda Lab web site (even though
Greetings all,
In the spirit of the continual quest for cost reduction, I have been asked
to look into the use of thermal circuit breakers instead of magnetic ones.
It seems like we rejected thermal breakers before for some reason, but now
no one can remember why.
Does anyone know of any
The European equivalent is the IEC 60825 series of standards. There may also
be more laser safety to deal with in IEC 60601-2-22 as well but I am not
sure since most of my work with lasers have been with communications
equipment.
I hope this helps.
Steven
- Original Message -
From: Joe
In Canada, the analagous organization is Health Canada. Similar rules and
responsibilities to FDA.
The European system is somewhat different. All medical devices being
marketed or placed into service in Europe must comply with the European
Medical Device Directive (MDD) and carry a CE
Group,
Amendment 2 (2001) to EN60825 Safety of laser products, has changed some
laser classifications. The amendment has included new classifications 1M,
2M and 3R. Class 1M and 2M include in their definitions For diverging
beams if the user places optical components within 100mm from the
13 matches
Mail list logo
