Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  • Users: RaulChavez
  • Content: Threads
  • Order by date
  1. RaulChavez

    Sincronous Motor fault

    Hi I´m working with a 9600hp 40 poles (180rpm) sicnronous motor with a brushless exciter. My question is: is possible to drive this motor to a extreme condition of 200% of nominal current and 160rpm by increassing the exciter volt? This was a real condition, and I´m trying to figure out if the...
  2. RaulChavez

    VFD condutor sizing

    Hi, I´m doing the eletrical project for a 300hp belt conveyour motor. It will work wiht a VFD that have to supply 140% of motor start torque. My question is, how can I define the right power conductor for this application since we have 450mt between the MCC and the motor. I´m looking for my...
  3. RaulChavez

    Locked rotor definition

    Hi, I´m working with a motor that blew during commissioning. this is a 1000cv@4000Vac motor with a locked rotor time = 3.5sec. According the vendor recommendations, we can do 3 starts per hour: one start each 20 minutes. According the relay records, this motor was started many times in a short...
  4. RaulChavez

    hart protocol adapters

    hi, I have the following problem: I can´t do the comunication between one temperatura transmitter and the PC to to the calibration. I´m usin a raytek infrared transmitter I believ that the problem is on the DB25 to DB9 adapter, Where can I find the pin configuration for this raytek hart adapter?,
  5. RaulChavez

    Siemens S7-412

    Hi, I have a client requieremt that ask for hart instrumentation asset management. My question is: can I do this using Siemens S7-412 hardware?

Part and Inventory Search