Document XzQ2LmRvyaz1D9QDvMaX6wg3J

(Advertisement) Fabri-Seal Insulation Failure Investigated Introduced by Elliott in 1948. Achieved 8-year field service record. First failure occurred in 1957. Causes investigated by Elliott engineers. TUe Elliott Company, which takes and in personal contacts. At the height such higbly-corrotive and moist pride m the service record of iu of this promotion die first Fabri-Seal etttor coil insulation (or Urge indue- * insubtioa failure occurred. After re* lien motors, had some explaining to covenqg rotn die initial tltock, (he do this U0 when iu nmck-poblicued sales management was quick to point atmospheres. How EOTott engineer* sohrsd (he problem Fabn-Seal insubtioo experienced iu out--and rightly so--that a failure, With the customer's permission, feat failure. bad to happen sooner or bier and the motor was returned to the factory Fabri-Seal Insulation was intro- tltat tliis did not in any way nullify for further iovestigaooo. After careful deced in 1948, iniallcd in motors die 8-year field service record. examination, EUiou engineers an 'soviag'atUiuca and industries all over nounced that "die motor revealed ir country. According to Elliou's Ridgway sales management, "these motor* shattered all previous field aervtoe records nrith not one insula- Fin* Insulufion FaHvre occurred In 1957 The Insulation fillure occurred jea refutable evidence of faulty materials and workmanship,"--quite an em barrassing thing to have to admit. "Our only consolation," Elliott en riwt breakdown in over 8 years.'" Then late 1957 die first failure occurred. Elliott cngitiecn were quick a motor serving a CalfCoast chemical plant. EUiou engineers hastened to tltc scene and louod that the gineer* reported," was chat this failure occurred in what our customer de scribed as 'the world's most severe to bunch an investigation to deter* oaoe wliat lied liajipcned to spoil suck a splendid record. Over 1,900080 hp fcistoltod An analysis of the tabulated field pliere washden with higkly-eorroshx, hygroscopic magnetiin chloride dust. When tliis corrosive dust blanketed dte mntfing, it absorbed moisture to an almost unbelievable extent. Failure occurred riglit aftera torrential down insulation application* where every major otaksofmotorlias been installed ... and lias failed in less *k*" one year ofoperation.** The EUtott Company promptly re wound die stator coils with Fabri-Seal service records confirm tltat since pour deluged die area wilh 11 in. of insubtioo, gave all mcdiaiucal pans 1948 more titan 1,900,000 hp of rain in a 24-liour period, bringing the additional treatment(nrcorrosivecon EJHou's large motors with Fabri-Seal humidity in the area near I009&. ditions and returned the motor to the insulation were put into service and Altboogh the weather-protecting en customer lor service. that none of them experienced an closure kept out die rain, tle mag Although clus failure hroke the insulationbreafcduwu innearly9yean. nesium dilurick wilh its water-obsorb- continuous service record that etfried Briefly, this insubtioa system in- irigaction literally "siitied" dietonit- in 1948, Cllioa sales management re -chides sealing of coil skit sections torc out of die air onto the coils. ported dial, "it did not reveal any with lund-tmpped Mylar*-backed "In effect," die euginecra reported, basic weakness in die Fabri-Seal Insu mica; plastic-scaling at vulnerable "die motor las been operating in a lation System." {feints, vacuum preconditioning and brine solution, practically the equiva jntaure impregnation* lum-to-tum lent of being submerged. Further _ EKtatt** continuous Insolation ttstlitg at high surge voltages, im more, the corrosive dust had attacked mersion of the complete stator io ' tmubtiag varnish and subsequent baking. Obviously, it also involves ocw materials nd fabrication meth ods, as well as thousands ofman-hours idwbting and analyzing accelerated , hfn-tcating oftiundreds of insulation ` systems.. i one electrical (dlvra over 0 years the print, steel baffles, and even brass name plates." It must be said, however, that st no time did the EUiou engineers blame the failure on die severity ofthe operating condition*. At the same time, they were still not convinced dial Fabri-Seal Insulation was at bull. In their opinion, Fabri-Seal coil inaubtioo tusplj mould netJail* even in Even while Eiliou Fabri-Seal insula tion was establishing the 8-year field service record, Elliott engineer* were busy life-testing a oew Super-FabriSeal iosubtion. Tltc results of these tests forecast a new era in Urge motor service life. They were made over a period of nine years, are now being tabulated and complete details will be released at an early date. bet that not one of these ma a^> experienced an insobtton fail"pi1* in over' 8 yean was prominently 2!^ literature, advertisements ELLIOTT Compartq ^ RMgway Plant, Rldgway, Pa. SOSour_ tAWUkr i*s*