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  • Users: Elec777
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  1. Elec777

    Transformers to feed Electric Arc Furnace steel plant

    Dears, we have 2X20MVA power transformers 66/33 KV WORKING IN PARALLEL TO FEED AN ELECTRIC ARC FURNACE (WORKING THROUGH INVERTER )AND ITS AUXILURIES&UTILITIES, THE TOTAL LOAD IS 35MVA, WHAT ARE THE RISKS AND POSSIBLE DANGEROUS INVOLVED IN CASE OF ONE OF THE TWO TRANSFORMERS FAIL, AND WHAT'S...
  2. Elec777

    ELECTRIC ARC FURNACE

    WE WILL BE HAVING IN OUR COMPANY AN ELECTRIC ARC FURNACE NEXT YEAR, IS IT POSSIBLE TO FEED THE SAID FURNACE BY DIESEL GENERATORS?
  3. Elec777

    STEAM TURBINE VANE MODIFICATION

    DEARS, DUE TO LACK OF ENOUGH WATER, I DECIDED TO GO WITH DRY COOLING INSTEAD OF WET COOLING FOR OUR COMBINED CYCLE CONDENSING STEAM TURBINE, FOR A SURPRISE I HAVE BEEN TOLD THAT I NEED TO MODIFY THE ROTOR VANES IN THE REAR SIDE OF THE TURBINE. IS THIS TRUE? IF YES THEN WHY?
  4. Elec777

    power plant project management organization chart

    am working as a power plant project manager, I prepared the project management organization chart I need some ideas on this.
  5. Elec777

    100 MW electric arc furnace

    Dears, we are discussing the case of supplying power from a 230 MW combined cycle power station directly to a 100 MW electric arc furnace, the power station is connected to the utility grid, because utility put on me some restrictions to operate the furnace on the grid, I convinced the power...
  6. Elec777

    connecting isolated power plant to loads

    why it is more difficult to connect a combined cycle power plant to loads than connecting it to the utility grid and what is the best way to connect the isolated power plant to the loads?
  7. Elec777

    power plant construction team

    am building the team for power plant construction, grateful if can give ideas what positions are in this job?
  8. Elec777

    oil filled transformers

    Dears, I want to ask whether it's better to ship the transformer filled completely with oil or empty?
  9. Elec777

    AC 3 phase voltage stabilizer ( using servomotors ) versus auto transformer

    Dears, The problem is: compressor motor nameplate reads 400/415 volts while supply voltage at site is 380volts, what is the best selection for increasing the supply voltage from 380 to 400 volts AC, a 3 phase voltage stabilizer ( using servomotors ) or autotransformer, please consider that...
  10. Elec777

    Gentlemen, At our project we have

    Gentlemen, At our project we have chillers 90tons cooling capacity ,i supplied it with power from 1600kva transformer 20/0.4kv,50HZ,6.4, oil type there are another residential 1000amps Load connected to the transformer ,according to my study the required cable size for 80m length from the TR...
  11. Elec777

    Compressors of chiller trip upon starting

    Gentelmen, At our project we have 2chillers 90tons cooling capcity ,i supplied it with power from 1600kva transforer 20/0.4kv,50HZ,6.4, oil type there are another residential 1000amps Load connected to the transformer ,according to my study the required cable size for 80m lengeth from the TR to...
  12. Elec777

    chillers paralleling

    dears, at our project we have two carrier chillers (carrier model : 30GTN090) THEIR SET UP IS FOR BEING RUN IN PARALLEL, when we run them one chiller a time(single chiller) or two machines in parallel we get alarms(T051, T053 AND T055), I have tried the troubleshooting procedure (attached) from...
  13. Elec777

    DC motor false overload shutdown

    in a modern universal milling machine ive got on the screen an overload alarm on the main DC motor and total machine shutdown, this happens only on auto mode and it doesent on manual mode where i can move the motor with no problems. thanks in advance
  14. Elec777

    AC Drive FAILURE

    AT OUR PLANT (SUGAR REFINERT)THE CENTRIFUGAL MACHINES MOTORES ARE FED&CONTROLED BY VFD ,THE DRIVE RATINGS:380V/3PH/490AMPS ,THE MACHINES AND DRIVES WORKED FOR 2.5YEARS VERY WILL ,AFTER THAT We recently started getting heavy hardware failures in THESE AC Drives, Here are the failure symptoms...

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