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COMTRADE is the standard ( refer to IEC 60255-24) so that transient record use common format. => https://webstore.iec.ch/publication/1170

Hi, Are yours relays, IED ( i.e. numerical) ? In this case, the best way forward to get use the relays records ( i.e. COMTRADE) for further analysis. such records samples at ( typical values) 20 to 50 samples /cycle. the outstanding issue will be whether you will be able to (automatiquely)...

Thanks for sharing the files. I also replied to you on linkedin, please check.

I suggest you put your settings/DR etc .. on e.g. DROPBOX ( or equivalent) and share here the link.

What happened when 87G operated ? did you energized a power transformer or similar beast ? Did the relay recorded a COMTRADE file ?

I attached ( or at least hope I have) a pdf file describing the MTBF stuff. http://files.engineering.com/getfile.aspx?folder=12b569bd-a93e-49f3-bb3e-952630c1369f&file=Stats.pdf Based on my experience, unavailability of IED is a matter of minutes, not days! the last figures from Schneider...

Some distance protection are available with inrush restraint ( e.g. http://www.schneider-electric.com/download/ww/en/results/0/0/19071615-MiCOM-P44x-current/0/). That being said, is it the inrush itself causing the maloperation ? Did you check if the CT goes onto saturation ( due to long DC...

Pscheshki, Please log your request as Poland (Poland is supra-regional center with former Areva, now SCHNEIDER office) and shall help you. Aside note, did you prove your Rg switches ? REGARDS.

Hello, I would suggest you contact Schneider Electric support at below link : http://www2.schneider-electric.com/sites/corporate/en/support/contact/customer-care-contact.page If your country is not listed, let me know where you are located. Regards.

Hi Neil, I suggest you contact Schneider Electric in Germany, they took over heritage from AEG. Regards.

For MiCOM P120, as all so-said P20 range, setting is made related to In ( e.g. 0.1 In for 10% threshold). For information, MiCOM P120 ( as well as other MiCOM) belongs now to Schneider Electric.

Thanks Dave for your suggestion.

Hello, I am looking for the following article but was not able to locate it. Does anyone knows where can I get it ? Author is N.E. Korponay and title is " the transient behaviour and use of current transformers". It comes from brown bovery review, 1975. Thanks in advance.

Hi Bdf, the trip itself will not be latched but the output contact ( RLxx, blue color in PSL) shall be latched. On the remote end, received signal shall be routed to RL, this one being latched. regards,

Limits at nominal current for 5P/10P are given in IEC 60044-1. this one is being replaced, but I assume it is still given in the new norm.( sorry, I don't remenber numbering).

P34x may be use as block protection as well ...

Hello, did you have a look at the disturbance record?

Scott, Is there anythink happening in th esirrounding network when 87T trip ? I mean, is there any Tfo or Capacitor bank switched in ?

I belive that most of automation buissness belong now to Schneider Electric. Actually only Micom Px4x are shared betwwen both company and all other range belongs to Schneider Electric only. Is it quite new from SE people but they should be able to support you anyhow.

Thank you David. I will refer to Blackburn when back in Office. Is such kind of drawing usual in US ? Regards.