I've noticed some electrical-mechanical overcurrent(50/51) relays labeled 50/60 Hz and others labeled 60 HZ. We have been requested to calibrate several relays for 50Hz operation. Is there a consideration for 50 vz 60 Hz calibration of the same relay? We are in a 60Hz country.
Thank you.
Peterb; I too went thru school with a slide rule, and microprocessers still baffle me...I can design a tube ckt still...I think. My point was that often times, in the lab or just fooling around, you "discover" something and then imagine a practical application for it. The...
Having been there before, I often wonder if something is found in a "lab experiment" and then we spend an enormous amount of time trying to describe it. I wonder if a great deal with regards to induction discs was empirically derived? I don't think there are any engineers left that...
