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Recent content by apa6eightball

  1. apa6eightball

    Flywheel UPS, 500 - 1000KVA

    Scotty, Smoked & Hold Excellent suggestion to hire a third party analyzer, I will present that at the next meeting as a first step "identifying the problem"..................'8ball
  2. apa6eightball

    Flywheel UPS, 500 - 1000KVA

    ScottyUK, I'm saying that the contactor drops open and the motor stops immeadiatly. I've never used a disturbance analyser, would you recommend a Mfg and model number?....'8ball
  3. apa6eightball

    Flywheel UPS, 500 - 1000KVA

    OK, We have 60, 3000-PSI hydraulic power supplies in a remote room under our material testing lab (isolates noise and heat). They consist of 1 - 125 HP, 2 - 75 HP, 25 - 50 HP and the rest are 10 and 20 HP 480 VAC 3 phase motors and they power actuators rated from 2,000 to 1,000,000 pounds force...
  4. apa6eightball

    Flywheel UPS, 500 - 1000KVA

    You are right ScottyUK, we used to try keeping some of the contactors up with a battery UPS and succeded in burning up motors when the voltage dipped or a single phase dropped out on the mains, I'm telling you the quality of our power leaves much to be desired. We run high performance servo...
  5. apa6eightball

    Flywheel UPS, 500 - 1000KVA

    WOW!!! Thanks everybody!! I have lots to digest along with my own research. I live and work in Western PA and he have had power problems since the 90's when I started here. Our most common problem is when we lose power for just 5 - 10 milli-Seconds, our pumps shut off. This can happen in a...
  6. apa6eightball

    Flywheel UPS, 500 - 1000KVA

    Has anyone had experiance with industrial sized flywheel UPS systems? My company is plauged by service line spikes, brown outs, blinks and storm related outages. I understand storm related outages but our power company is unable to correct or explain the brown outs and blinks which raise hell...
  7. apa6eightball

    B 193-02 test method for resistivity of electrical conductors

    I am seeking advice on what type of equipment is used to perform resistivity testing on electrical conductor materials as described in ASTM standard, B 193-02
  8. apa6eightball

    1 phase 230 Vac from 3 phase 460 Vac

    Thanks for the explanation about the UK 3 phase, It simplifies this project a lot Murphy's Law Rules!!
  9. apa6eightball

    1 phase 230 Vac from 3 phase 460 Vac

    Thank you JRaef, I only asked because I have a print of a 3 phase 415Vac motor starter/controller designed and built in the UK. It has a 240/110 transformer on L1 to neutral, a 240/24Vdc power supply on L2 to neutral and another 240/24Vdc power supply on L3 to neutral. I didn't think it looked...
  10. apa6eightball

    1 phase 230 Vac from 3 phase 460 Vac

    What is the best way to tap off 1 phase ~230 Vac from a 3 phase 460 Vac 60hz main? It will be used to power a cooling fan and a couple of small dc power supplies in an enclosure.
  11. apa6eightball

    3 phase Motorboss soft start

    Thank you, gentlemen, for all of your valuable input. I am going with a VFD for this application, although I may try a motorboss for a future, smaller and less critical application just to see how they work.........apa6eightball
  12. apa6eightball

    3 phase Motorboss soft start

    Thanks for your response and the FAQ links, CJCPE, they offer some valuable information. We are using a PLC to control a valve to dump the pressure at start up to reduce the load, then ramp the pressure up after the motor is at full speed. We are using a compensted pump to handle an anticipated...
  13. apa6eightball

    3 phase Motorboss soft start

    I am designing a new starter/control system for a 3000 psi hydraulic power supply with a 3 phase, 460Vac 100hp motor. I have been looking for something more efficiant than a star delta and found the Motorboss soft starter sold by Advanced Motor Power, www.advancedmotorpower.com, has anyone ever...
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