Re: [PSES] power strip details -> electronic document preservation

2017-09-19 Thread Pete Perkins
Brian et al, Yes, I have struggled thru several document format changes and now keep all important docs in both their native format (eg docx today) as well as PDF. Not an absolute guarantee of compatibility but now there are a couple of starting points to work to recover documents. Oh

Re: [PSES] power strip details -> electronic document preservation

2017-09-19 Thread Brian O'Connell
Believe that preservation of legacy electronic documents is very important, and am happy to see someone attempting to preserve this stuff. Please note that 'doc' and 'docx' are not usable standards (even where the OOXML is supposedly per the ISO29500 format) and is ill-suited for reliable backu

[PSES] power strip details

2017-09-19 Thread mickm
Ralph, The IEEE is a not-for-profit organisation, but if there is a chance of making money they will do so. Traditionally you can still buy withdrawn standards. Having revised several old C62 standards the biggest problem I found is that the IEEE loses the source text or graphics or b

Re: [PSES] power strip details

2017-09-19 Thread Ralph McDiarmid
I trust all the good background information in C62.41.1 doesn't get lost when pull the standard in 2018. Hopefully it gets transferred (and perhaps revised) to a new IEEE std. I will hazard a guess that MSPD stands for Mains Surge Protection Device. Ralph McDiarmid Product Compliance Engineer

[PSES] Implications of MSPD

2017-09-19 Thread mickm
John I know you monitor the IEC TC 108 safety saga. Have you noticed the long running Japanese proposal to use two surge protection components (SPCs) in series between services? It amounts to building an MSPD, with no PE connection, into the equipment. This guarantees the surge from one servic

[PSES] Meaning of MSPD

2017-09-19 Thread mickm
Good point John, I did explain MSPD meant Multi-service Surge Protective Device in an earlier message, but I should have repeated that for new readers. Surge Protective Devices (SPDs) tend to be customised to the service they are intended to protect. Power service SPDs can be classified into A

Re: [PSES] power strip details

2017-09-19 Thread John Woodgate
Thank you. Not Miami South Police District, then. I wouldn't put protective devices for different services close together, because energetic crosstalk (with sparks) could occur. With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M Wood

Re: [PSES] power strip details

2017-09-19 Thread Adam Dixon
>From K.98: 3.1.4 multiservice surge protective device (MSPD) [ITU-T K.85]: A surge protective device (SPD) containing both telecommunications and mains protection. It may also include port protection for video or Ethernet Cheers, Adam in Atlanta On Tue, Sep 19, 2017 at 4:16 AM, John Woodgate w

Re: [PSES] power strip details

2017-09-19 Thread John Woodgate
Good info. What is an MSPD? With best wishes DESIGN IT IN! OOO – Own Opinions Only www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England UK is a sovereignty, not a Zollverein-ty -Original Message- From: mickm [mailto:mjmay...@gmail.com] Sent: Tuesday, September 19, 2017 8:51

[PSES] power strip details

2017-09-19 Thread mickm
IEEE Std. C62.41.1 (2002 - reaffirmed 2008) contains a mountain of information. If you go to A.2.2.3 Voltages induced in cables adjacent to down-conductors, it covers the induced voltage in an open-circuit loop by a nearby lightning current. The induced voltage table gives values ranging from 5