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AIRPORT / HANGAR 400 HZ POWER

AIRPORT / HANGAR 400 HZ POWER

(OP)
thread593-192953: 400 hz.airport power problems   AIRPORT OR IN HANGAR 400HZ POWER

HI FOLKS - JUST RETURNED TO THIS FORUM AS I AM NOW RETD. A+P - SO MAYBE GHOST BUSTER HAS SOLVED HIS AIRPORT 400 HZ SUPPLY PROBLEM ANYHOW OTHERS MAY HAVE ENCOUNTERD A SIMILAR PROBLEM .
 BASICALLY IT IS NOT CORRECT TO QUOTE A VOLTAGE OR FREQUENCY TOLERANCE FOR ALL WIDE BODY AIRLINERS - THEY ARE ALL DIFFERENT - AND THE AIRBUS RANGE ARE TIGHTER THAN THE BOEING AIRPLANES .
  WHEN WE WERE INSTALLING HOBART 400HZ F.C.U.s WE NEVER ENCOUNTERD THIS PROBLEM DUE TO THEIR TIGHT SPEC. - BUT WE SAW MANY OTHER MANUFACTURERS RUN INTO THIS PROBLEM.
 ON THE A.380 FOR INSTANCE IT NEEDS A MAX. OF 2 X 180 KVA = 360 KVA .   FOR THIS REASON IT ALSO NEEDS 4 X AN3430 TYPE FLEX CABLE ASSYs.
 THE HI TRANSIENT LOADS WILL THROW MANY F.C.U.s OFF LINE AS THEY DO NOT MAINTAIN THE TIGHT VOLTAGE + FREQUENCY CONTROL REQD. BY AIRBUS.  THIS IS ESP. TRUE OF ROTARY TYPE 400HZ G.P.U. / F.C.U.
 THE MODERN AIRLINER IS MONITORING ALL OF THE INPUT POWER TO THE AIRCRAFT - AND IT WILL REJECT IT IN m/s IF IT DOES NOT COMPLY WITH THE AIRFRAMER SPEC.
 THE 400HZ CABLES WHETHER FIXED IN CABLE TUNNELS / DUCTS  OR THE FLEX TYPE ARE CRITICAL TO THE AIRCRAFT - YOU CANNOT USE 50/60HZ CALCS. TO WORK OUT WHAT CABLES ARE NEEDED .
 TALK TO GOOD FOLKS LIKE HOBART - TROY - OHIO ABOUT THIS -   TRUST THIS ASSISTS J.C.    

RE: AIRPORT / HANGAR 400 HZ POWER

Thanks for all the good information, but please use lower case as it is much easier to read.

rmw

RE: AIRPORT / HANGAR 400 HZ POWER

(OP)
HI - BUD NEGATIVE - INCORRECT STATEMENT - NOT WHEN A PERSON GETS TO 72 YRS OF AGE AND THE EYESIGHT IS BATTLE DAMAGED - WILL NOT RESOND TO ANY MORE ENG. FORUM QUESTIONS NOW - GOODBYE J.C.

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