I have searched online for an explanation of these terms and was unable to find a clear enough one. Request you to explain with reference to the images below:
Thanks
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3\$\begingroup\$ Any decent electrical textbook, and many sources on the web... \$\endgroup\$ – Solar Mike Mar 3 '18 at 18:10
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\$\begingroup\$ Welcome to EE.SE. It would take a book to explain all the details, so the up-front answer is to read books on 3-phase, plus what is on the web. @Andyaka has a good summary below in his answer. \$\endgroup\$ – user105652 Mar 3 '18 at 20:38
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- Phase voltage is between A and N (or B/C and N). Also a to N or b/c to N.
- Line voltage is between any two of the three feed lines (ignoring N if present)
- Line current flows down any line between source and load (ignoring N if present)
- Phase current is the current in any load element whether star or delta
