Documents / Report
This is the final report of the Scientific Study of Unidentified Flying Objects, conducted by the University of Colorado under Air Force contract F44620-67-C-0035, with Edward U. Condon as scientific director and Daniel S. Gillmor as editor. It was submitted to the National Academy of Sciences on 15 November 1968 for review. The report includes field studies, photographic and radar analyses, case studies, historical chapters and appendices such as the Robertson Panel report and the Twining letter.
Witllin 12 min. power gen~ration in lower Untario, N.Y., and New
England (L'X~('pt for Maine and eastern New Ilampshire) virtually ceased.
Volu1l10 1 of the (,PC report states that "the causes whi eh can triggt:r
severe disturbances are practically unlimit:!vel at which its Ilackup protective relay was sot to
function. Thus the four remaining lines trlppf..!J out in
cascade in 161 cvcles' time (2.7 seconds).
The relay that triggered the Jisturuall<.:e WLlS one of
five backup scnsil:.g dey ices (one backup }'i;)l ay per line)
that protect the lines against failure of the Heck pri-
mary relays. or of drcui t breakers Cl t remote locations,
According to the He report. the fi vc badup rdays \·'cre
installeu ill 1,)51, and, in 195(;, a brcakvf 011 (JilL: of the
23U-kv. lincs fui lC'J to Opt'll lrcasotl !lot c;xplained)
following" ftl\.Ilt. III JUllt;ary H){),'I., as a I't'sul t of a
rc-t'valuatioll study uf its b1.ickup protection requiremcnts,
Ullt(ll.lO Hydro JJlodifll.'u these relay S0. tjng.<; to iIlCTCaSl'
tn;: S<';Opl of their protective functions.
figure (, iudi cat('s tIll' sct 'lf l"ondi 1: j UIIS :IIHi<.:r wh.i <.:11
this type of relay \,;o\llJ trip. The t:v.iJellcc sugge:;ts tlwt.
at !,: lu:l~. the load and gcncrutioll L:h:.ractcristlcs of the
Canada-Uniteu State~ interchangc caused :ouch a L:lJll<iitiuli
to be reuched.
rlw HC report f'Jrthct' stat,cs tllUt the relay 3t,ttings
I
mllde i.1l 19:J3 at the Beck plant Were .ill efft.:ct at the time
170 Report, from the classic collection. The PDF is mirrored here; the original link is under it. 1497 pages are in the text index: search them above, or from the library's search.