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  • Users: drax
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  1. drax

    Nitrile versus other material for gaskets

    Thanks you for your answers, the gasket is under compression.. I believe it is just a cosmetic issue but our customer is concerned. thank you for your idea of a lip, this may help. Regards
  2. drax

    Nitrile versus other material for gaskets

    All: As a manufacturer, we currently use Nitrile as a gasket material for a submersible piece of equipment. One of the pieces of gear shows some cracking (<2 years in service), however, still holds the seal. A couple of questions: 1). Is Nitrile a good choice....the equipment is not...
  3. drax

    Substance to clean components to help stop electrical tracking

    Can I use Isopropyl alcohol to clean particle contaminants to prevent tracking? it is 15kV gear. Does anyone have better suggestions? seems like I cannot use denatured alcohol due to toxic safety.
  4. drax

    Welded SST constuction versus Cast

    Guys, We make a SST part by welding a SST tube to a pad, we continous weld the tube on both sides. The volume is not high enough to justify a cast tool at this point. The customer requests a one piece construction , I would like to know if the welded is just a strong as the cast? and any data...
  5. drax

    3 Phase Similation

    I'm looking for something small and portable for a demo.
  6. drax

    3 Phase Similation

    Could someone help me with a circuit to duplicate 3 phase from 120VAC single phase. It does not have to be accurate but I would like to show some real "dummy" values for voltage and current. Can this be done. I have a small transformer that I dupe 2 voltages but being a mech . engineer not...
  7. drax

    New Motor Design

    This is the actual table: Volts Amps In RPM Torque (oz/in) HP Watts Out Efficiency 190 0.9 MAX 0 0 0 0.0% 190 1.75 10000 20 0.1985 147.7 46.8% 190 2.78 8000 45 0.357 266 53.2% 190 3.52 7000 68 0.472 352 56.7% 190 4.35 6050 88 0.527 394 52.5% 190 4.45 6000 90 0.537 400 52.5% 190 5.35 5000 118...
  8. drax

    New Motor Design

    This site is great, thank you all for your help. I did find the original specs for the motor. Mechanically, the motor I recieved looks great, just a matter of power. I found this table. Is this all I need to insure that I have a duplicate? I have a table listing the amps, watts input, rpm...
  9. drax

    New Motor Design

    He mentioned that the motor is energized for 1/2 second per breaker closure, with a max. of 2 closures per minute. How would I measure the output torque of the old motor, under its load?
  10. drax

    New Motor Design

    General Question from a mechanical engineer: I have a motor that I have been using for many years and now is being discontined. I have a source in China that I sent the motor too to duplicate. Recieved the new one but it does not electrically function the same. One of the technicians sent...
  11. drax

    Need a 8000A-10,OOO amp magnetic field? help?

    Thanks for all of your help, it looks like a generator is the way to go. This test is for magnetic reaction around equipment. One engineer stated this about looping welding cable around the bus bar, do you guys agree? "It doesn't make sense to me based upon my college days as well as a few...
  12. drax

    Need a 8000A-10,OOO amp magnetic field? help?

    Your assumption is correct on the saturation of the copper. Out of the two CT's we were able to push only 900A at 277V. The CT's are rated 400V, so we could have gotten more out of them, but not even close to the 7000A we are looking for. The time restraint is 90 seconds. We have gathered...
  13. drax

    Need a 8000A-10,OOO amp magnetic field? help?

    Our customer wants a magnetic field around some bus bars for testing. Could anyone help me with advice on how to do this. I have some 10,000:5 C.T.s....could I push 5 amps into them and if so, at what voltage...could I use a variac to adjust the field level? thanks
  14. drax

    Timing battery drain

    I'm going to use (2) 1.5 VAC batteries, the source would be constant. I was thinking using a small relay with a NC contact while the coil is energized to run a timer. When the battery dies the contact open and stops the timer. This is probably too simple and I'm missing several key points...
  15. drax

    Timing battery drain

    Does anyone know how I can use a digital timer to stop when a battery source is depleted in a simple electrical circuit. I would like to add a certain load and use a timer to determine when the battery dies. Being a mech. engineer, I would greatly appreciate any help and recommendation on a timer.
  16. drax

    Trip Coil Design

    Any ideas on a design for a AC trip coil that has to release a 2 lb. load. Asa the spec calls out , they want an AC shunt trip to work down to 13VAC on 125V P.U. basis, which can also reach 190VAC L-G. the latch load is around 2 lbs. Therefore, any trip device must develop in excess of 2 lbs...
  17. drax

    Filling a submersible enclosure with nitrogen

    No, the unit is not in water..but the enclosure is submersible. It has a motor and other copper inside that take up the volume.
  18. drax

    Filling a submersible enclosure with nitrogen

    3.5 Psi is the max on the regular. I had it turned wide open.
  19. drax

    Filling a submersible enclosure with nitrogen

    I have a submersible enclosure approx. 60 cubic feet in volume, with some mass inside to take up maybe 1/4 of the volume. Anyway, I had a Nitrogen tank with a regular set at 3.5-4.0 psi max, the tank was 90 cubic feet at 2200 psi. I was trying to fill the enclosure with around 4 psi, but when...
  20. drax

    RS-232 Flat Connector

    I have a special designed relay that has a DB9 connector that a programming pendant is plugged into occasionally but I'm making a monitoring device using that availble pendant location that has 5 VDC source but I have little room in front of the relay to connect.

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