Peter, I own and once used a Simpson 228 and was told that it did not comply with the test requirements of '950. So I bought the Simpson 229-2 and that was accepted. Since then, the standard was changed again and the 229-2 was no longer compliant. I ended up buying an ED&D LT-951 Leakage Current Tester that has since been accepted as performing the test according to the standard. I never really understood the total issue (did not spend the time to) and just bought equipment that would satisfy those agency guys. Shame on me.
I would like to hear from others as to what equipment they use and does anybody really know if it complies to the standard? Scott [email protected] ECRM Incorporated Tewksbury, MA USA -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Thursday, November 25, 1999 2:56 PM To: [email protected] Cc: [email protected] Subject: Earth Leakage Measurement Circuit per EN 60950 Importance: Low Duncan and PSNet To build the network described in 950 is not trivial if one wishes to meet all the requirements to achieve adequate performance over the specified frequency range, in the expected environment in which it must operate. Because this is not a trivial matter, IEC 60990 'Measurement of Touch Current and Protective Conductor Current' has an entire section devoted to measuring instruments and another covering calibration to show adequacy. If you wish to build such an instrument, I recommend that you get this standard. You can order it directly from the IEC website in Geneva. There is one commercial instrument which meets the requirements described in 950, the Simpson model 228 Leakage Current meter. Look at their website. Incidentally, I use this instrument in my own work. There may be others available. If you really want to continue to build your own instrument, but need some additional help, I can recommend an experienced measurement equipment consultant who would probably help you. Contact me privately for this. Good luck in your preparation for this project. >:>) br, Pete Perkins Convenor, IEC TC74/WG5/IEC 60990 - - - - - Peter E Perkins Principal Product Safety Consultant Tigard, ORe 97281-3427 +1/503/452-1201 phone/fax [email protected] email visit our website: http://ourworld.compuserve.com/homepages/peperkins - - - - - --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
