How old is this quote?
How old is this quote?
(OP)
I found a passage is a book I've been reading that is a perfect example of "the more things change the more they stay the same." Anybody want to venture a guess as to how old this passage might be?
In recent years the complexity of relay problems has increased immeasurably with the expansion and interconnection of power systems. Many large companies have found it necessary to revise completely their major relay systems. To meet the more involved operating conditions, relays must be fundamentally more accurate; applications by the method of complete short-circuit studies for steady state and, in special cases, transient conditions must be made. Field tests must be carefully made, and attention must be given to the characteristics of auxiliary devices, current transformers, potential devices, etc. In brief, all errors entering into the operation of the relays should be thoroughly understood and corrected, or allowance made where complete correction is not practical.
In recent years the complexity of relay problems has increased immeasurably with the expansion and interconnection of power systems. Many large companies have found it necessary to revise completely their major relay systems. To meet the more involved operating conditions, relays must be fundamentally more accurate; applications by the method of complete short-circuit studies for steady state and, in special cases, transient conditions must be made. Field tests must be carefully made, and attention must be given to the characteristics of auxiliary devices, current transformers, potential devices, etc. In brief, all errors entering into the operation of the relays should be thoroughly understood and corrected, or allowance made where complete correction is not practical.






RE: How old is this quote?
I'll guess 30 years!
I particularly find the very last statement interesting:
"or allowance made where complete correction is not practical."
Yikes! what kind of allowances can you make for relay errors, oh ya! add more relays...
interesting post
pennpoint
RE: How old is this quote?
RE: How old is this quote?
I'll guess 1920
TTFN
RE: How old is this quote?
RE: How old is this quote?
So whether from the 1930 - 32 work or from the 1935 rewrite, the quote is about 70 years old.
How far back do the CO and IAC relays go? Was the complete revision of relaying systems mentioned the original application of the those relays?
RE: How old is this quote?
Ok ScottyUK! I owe you a pint but you'll have to come to So. California to collect.
L8R
RE: How old is this quote?
Some telephone exchanges used to have millions of telephone switching relays. Perhaps, the London, England, telephone exchange (main?) had many millions of relays. There was a book written about those relays covering just the relay contact theory and practice.