- Original Message -
From: Wells, Christopher D
To: 'Chris Wells'
Sent: Wednesday, April 25, 2001 9:19 AM
Subject: RE: Transformer Question
> Tac Pham - Regarding transformer recognition.
> When I have designed a custom power supply like Ken has and the
transformer
> is made by an out
Andy,
Supplement A of NEMA250-1997 contains information on NEMA Type 7. It is
defined as "Enclosures constructed for indoor use in hazardous locations
classified as Class I, Division 1, Groups A, B, C, or D as defined in NFPA
70." It goes on with more information than I am willing to type. Give
NEMA 250-1997, Supplement "A" describes applications, features and test
criteria of enclosures for hazardous (classified) locations.
Certification of products for hazardous (classified) locations is factory
mutual research's specialty. If I can be of service, please give me a call,
fax or email.
Enclosure ratings 7, 8, 9 and 10 are for hazardous locations.
An enclosure rating of NEMA 7 is defined as "Enclosures constructed for
indoor use in hazardous locations classified as Class I, Division 1, Groups
A, B, C, or D as defined in NFPA 70." NEMA 7 defines an enclosure that
will contain a
An enclosure rated NEMA-7 is intended for use in Explosive atmospheres (read
- big, heavy & VERY expensive). You would need to know the Class, Division
& Group to select the correctly rated enclosure.
This (more or less) corresponds to the European EEx Zone, CAT. and Group
classification. See IEC-
Michael,
Thanks for the response. I am familiar with many of the European
requirements for Hazardous Areas and am also aware of the US Division and Zone
classifications (NEC 500 & 505?). However we have not come across NEMA 7
before. Now that I know it is genuine, I can dig deeper.
Do
Hello, Marko.
A remote interlock connector is required when there is
potential human exposure to laser radiation, as might be
found in labs or industrial environments where the laser is
cutting something or marking a product (there may be other
applications). In such an environment, there is a n
Colleagues
I have been contacted by one of our sales engineers who has a request to quote
for supplying a product suitable for hazardous areas meeting NEMA 7 rating. He
has already spent some time surfing the web.
My NEMA to IP rating conversion chart only lists NEMA 1, 2 3, 3R, 3S, 4, 4X, 5,
6
Lower voltages, because of less corona, tend to have more energy, sooner,
relative to the total. You might pass a 15 kV air discharge test -- but
fail, lower.
We ALWAYS want margin, and others ALWAYS want none. My experience in a
previous area of the industry is, this lasts until a rash of field
Eric-
you can try with the Hungarian Institute for Testing Electrical
Equipment (MEEI).
website address: http://www.meei.hu/en/jogszab.shtml
Alain Sam-Lai
Gigabyte Technology
-原始郵件-
寄件者: eric.lif...@ni.com [mailto:eric.lif...@ni.com]
寄件日期: 2001年4月25日 AM 06:22
收件者: emc-p...@ieee.org
主旨: R
Forwarded for Marko Radojicic. Please include Marko in any replies.
Dave Heald
Original Message
Subject: System Laser Safety questions
List-Post: emc-pstc@listserv.ieee.org
Date: Tue, 24 Apr 2001 14:50:36 -0700
From: Marko Radojicic
To: "EMC-PSTC (E-mail)"
Greetings,
We hav
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