Document JYppOY7XgnnEOve619Lpnnj6

What Methods Are Best to Check for Phose Reversal? Oua plant hot several 19-kv 3<ph i/0 lead severed cablet feeding an outlying tub* station The voltage of oor main but ii 11 kv. At the accompanying sketch vrlU hoar, bui voltage ( raised to 19 kv by tronaformera connected delta-wye. There it o common but at the inhalation. Tbo ayatem freqncney It 25 eyelet. Defore restoring the fader to servico after a repair hat boon mode on any cable* It U necessary.to make certain that no phase has been reverted. We have been using a glow stick to pkate oat acton the open disconnects at iho power-station bat. Daring ibis test the repaired cable it energised by closing the three dliton* nects and the circuit breaker at d>e tab slstioo end. We have some doubt them this method being foolproof becaeta tha transformers ore between the cable sad power-station disconnects. Have any Poweb readers faced Uib problem and found a practical lololient Wo will appreciate hearing abotn methods of checking for phase reversal that * can apply to our system.--JR ^ Ajnaconda Argonical Admiralty Tubes \yf; end Anaconda Muntz Metal Tuba Sheols 80 Into 30,000 *q. ft, EUiott Condenser for now utility plont Readers' Answers What Is Best Way to Remove Ash Siftings? fTUt it turn Urn* <m *Uk %at auast Nw <>.> Wg iiavs two watrrtum boilers, each fired icith an underfeed stoker. The compartment under the front of the stoker is a siftings chamber, which col lects the fine ash that drops down. This compartment fills with ash siftings that must 6e removed on an average once o month. The chamber is not readily ac cessible, so any siftings that collect hove so be shoveled through the airtight door in the front. We find this fob both dis agreeable and tedious. We have tried one or two schemes for removing the ash by machine, put to date have found no practical remedy. Have any of Powcn'g readers encoun tered a similar condition, end worked out a good solution ?--HWW Remove Siftings by Vacuum 1 BuectST that HWW use either o steam or air-vacuum ejector system to remove the si/tiogs. It will be necessary to In stall 4-n. cast-iron pipe along the boiler front underneath the stoker operator. Pipe fillings' si suitable intervals will provide for the necessary extensions Into sifting chamber. Maintenance crew can install all parts, made on the job. The siftings may be discharged Snlo the rear ashpit and removed as usual or into a special tank, whichever U most convenient or cheapest.--A T Appleton,' Winnipeg, Canada Hopper Installation Tips HWW do&s not say whether room is available under the sifting chamber. If there is sufficient space, remove the present Boor of the chamber and install e hopper fitted with a cleanout door and o discharge duct* as shown In sketch below. By this means the sifungi con be removed without shoveling or working in restricted pntMgea.--John D Thutnan, Buffalo, N. Y. tog tmi POWERS June I HI* his dividqd watbb-box conddnsdr, manu W* O.D. x .058" x 22' 3" long. T\ factured by the Elfiotc Company, Jeannette, Arsenical Admiralty Alloy provides all of the Pa., will serve a 30,000 KW turbo-generator in advantages of the original Admiralty Alloy ... the new Pennsylvania Electric Company plant at * Warren, Pa. b*. Anaconda Arsenical Admiralty was specified high hear transfer and good corrosion resistance ... plus special resistance to detincification. Arsenical Admiralty is but one of eleven stand for the 5950 tubes, which are set in 114" thick r tube sheets of Anaconda Muntx Metal. Hibes arc ard and several special Anaconda tube alloys for condenser and other heat exchange applications. To help you select the alloys best suited for your CmuicaHaa needs, our Technical Department will be glad to COOpCratC with your own engineers or your equipment manufacturer. Also, write for your copy of Publication D-2, which provides detailed CONDENSER TUBES information. THE AMERICAN BRASS COMPANY General Offices: Waterbary 88, Connecticut Sttbtidfary of Amocende Copper Mining Company If OmAu ANACONDA ANtttCAN Bun LTD. Sew tbremm, Oat. ^OWfR . Jon* 1940