Double-logarithm plotting charts
Double-logarithm plotting charts
(OP)
We need to plot customized protection curves on TCC charts and would appreciate links to download blank double-logarithm charts.
Thank you all for your assistance.
GAC
Thank you all for your assistance.
GAC






RE: Double-logarithm plotting charts
Have you considered buying a TCC coordination software ? They make things a lot easier as they have tons of device tcc data sheets readily stored already. Do a Google search you will find plenty of them.
I also heard that the points you plotted in the Excel program can be exported into these commercial tcc softwares.
Good luck.
RE: Double-logarithm plotting charts
A nice extension if you use mathcad is to set it up to import the comtrade record of a fault and confirm the tripping times (by eg modelling the disk movement of an induction disk relay). Haven't seen any commercial TCC software that can do that (for less than the price of an arm and a leg).
Bung
Life is non-linear...
RE: Double-logarithm plotting charts
RE: Double-logarithm plotting charts
It is my understanding that the company that used to manufacture the paper is no longer in business. I was told that by a friend at the utility company after they bought out after all of the stock. Anyway somtimes it is easier to do curves by hand if they are only a few. Excel works okay also as long you use the log scale, but for doing a lot coordination software is still the way to go.
Thanks,
umrpwr
RE: Double-logarithm plotting charts
RE: Double-logarithm plotting charts
http://www.mathematicshelpcentral.com/graph_paper.htm
http://sorrel.humboldt.edu/~geodept/geology531/graph_paper_index.html
http://mathpc04.plymouth.edu/gpaper.html
or any of the other 1,250,000 sites that a google search of "graph paper" returns.
RE: Double-logarithm plotting charts
RE: Double-logarithm plotting charts
Bung, thank you for your comments, Mathcad 7 is the latest version I remember using for creating and plotting custome curves (unfortunately, no longer have access), among known commercial packages such as Dapper, EDSA and DIGSI. Excel did not give me nice times, perhaps I was not brave enough to solve the problem.
Thank you all for your contributions with tips and links.
RE: Double-logarithm plotting charts
www.members.cox.net/mikecrivello/ Graphingonloglogpaper.doc
You may copy and paste the graph in another doc, and set the size of the page where you want to print the log-log graph ...
RE: Double-logarithm plotting charts
RE: Double-logarithm plotting charts
RE: Double-logarithm plotting charts
DanDel, will appreciate if you can put in a website that file for downloading. currently we are doing protection coordination.
Jubailcity, the DIGSI you mentioned is from Siemens?
thanks for your response.
RE: Double-logarithm plotting charts
You can create virtually any type of graph paper.
With Log/Log you can specify the number of cycles, colours etc.
It can also be copied to the clipboard.
(and it is free !!)
http://www.marquis-soft.com/graphpapeng.htm
RE: Double-logarithm plotting charts
dafo74, yes, it is from Siemens (DIGital SIemens, I guess)
jlazucena & DiscoP, thank you for your inputs.
RE: Double-logarithm plotting charts
More so, you can make use of the library then print. Yup, its a save disable program.
hope it helps.
RE: Double-logarithm plotting charts
Also, see Figure 15-9 in Reference:
IEEE Std 399-1997 Brown Book