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Recent content by omime

  1. omime

    Staring power of motor

    I can do simple cals to find the starting power required by formular Pst= sqt.3*V*Ist*PF( starting)/PF(100%load) Maybe I am wrong, Pls correct it !!! Thank a lot, OMIME
  2. omime

    Staring power of motor

    Motor is squirrel cage AC motor to drive srew pump. Rating is 580kW, 6600V/50Hz/3 Ph, Ist/In=5.5, relat. starting torque=0.4, 0.91PF @ 100%load. Thanks, OMIME
  3. omime

    Staring power of motor

    Can anybody know the formular to calculate the power required during motor starting, in order to check the a margin power generation deserved for this case. Thanks a lot, OMIME
  4. omime

    Explosion proof compressor

    Can anybody advise a good product and website to supply the information of explosion proof compressor - hermetic or semi-hermetic type for air-conditioning as a condenser is located at the Hazardous area, certified NEC st'd. CL1 Div2 Group C&D. Any useful recommendations will be very much...
  5. omime

    Finding Carrier HVAC training course

    Hello gentlemen, Can anyone suggest us the HVAC training course providing for electrical maintenance team in Thailand. We need a very specific training involving - The fundamental concept of refrigerant cycle of plant air conditioning sys. - Preventive maintenance - And HVAC electrical...
  6. omime

    Cleaning HVAC's duct

    Dear sir, I planned to conduct " cleaning of air-conditioning ducts" of HVAC unit on offshore platform ( Thailand). Can anyone give me some information and Contractor's names nearby Thailand, who have a large experience and expertise for duct service as well as providing skilled...
  7. omime

    Power source for offshore remote platform

    Dear all, I launch to install new telecom. equipment situated on unmanned wellhead platform ( outdoor use/hazardous area zone 2) which load consumption requires continually 5kW at 220v,50Hz - 24 hrs in operation. Can anyone recommend a power generation source (such as diesel generator, solar...
  8. omime

    Redundant feeder for 220VAC network

    Dear Mr.jbartos Each feeder from the same power source (UPS distr.) consists of 2-conductor( phase/neutral), armor type cable supplying to sub.dis pl. Phase and Neutral conductors of cable 1 connected together with phase and Neutral conductors of cable 2 at the busbar mounted in this panel...
  9. omime

    Redundant feeder for 220VAC network

    Dear Mr.jbartos In response to your queries : 1) Total load connected 5470 watts, 31.1 A, 0.80 PF for PLC, DCS, telecoms console/multiplexer cabinet , etc..) 2) Single phase 220V, 2 wire, 50Hz 3) Approx. 140 meters. 4) Cable construction is 2 cores- copper / XLPE/PVC/ Double galvanized...
  10. omime

    Effect of Generator driving nonlinear load- varies speed drives (VFD)

    Dear Mr.jbartos, Referring to your suggestion item 2,before go ahead to replace a new voltage regulator I have some more questions : 1) How/procedure to record the waveforms of current and voltage and measure the harmonic content in the line ? 2) What is the instrumentation of measurement the...
  11. omime

    Redundant feeder for 220VAC network

    Dear all, I launch to modify the AC voltage distribution network by pulling a new additional cable( redundancy) from the 220 VAC dist. bd ( from interruptible power supply -UPS) to sub-dist. panel ( 10 outgoings to load )because there are vital loads( need power without interrupting like DCS...
  12. omime

    Effect of Generator driving nonlinear load- varies speed drives (VFD)

    Dear sir, Thank you for your answer, dated Nov2, 2000. We would like to provide further information further to Commonly, a diesel generator is used to provided power for staring the turbine in a "Black Start" situation. Starting cycle : When the start/crank cycle is initiated...
  13. omime

    Effect of Generator driving nonlinear load- varies speed drives (VFD)

    Dear all, Our plant have two Gas-turbine generators, rated 2*2.8Mw supplying electricity to all consumer. The starting system of this turbine consists of Diesel generator(220kW,3ph,380V,50hz,417A)feeds to VFD(rated 100-150Hp/210A)driving the starting motor(50HP/90A). Our problem is there is...
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