Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

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

Recent content by khanengr

  1. khanengr

    reasons of flash in air break contactor of 3.3kV motor

    hi dear all, we had a blast in a 3.3kV air breaker contactor connected to motor of same ratings, the flash blast occured the moment we tried to close the switch, after a period of long time. But first, we opeated the above mentioned contactor, by giving it 3.3kV supply on NO LOAD and it...
  2. khanengr

    Different Metal Tools

    Which tools are better??? or in other way, what is the difference between Stainless Steel tools and Chromium Vanadium Tools?? Please explain in details.
  3. khanengr

    Life determing tests on 50 years old switchgear of 11kV and 3.3kV

    Hi dear all, I am conforted with a situation, I am provided with following switch gear which is about 50 years old, now I have to start them. We refubrished the switchgears, but when we started two motors of 3.3kV, arc flash occured in both separate relevant switchgears of motors, I showed the...
  4. khanengr

    no need of thermal over load relay for 3ph AC ind motor

    Hi dear all, I am talking about Circuits for 3 phase induction AC motor. What we usually have is a Crcuit Breaker, magnetic Contactor and thermal over load. My question is that if I use Crcuit Breaker which has thermal over load tripping and immediate short circuit tripping capabilites then...
  5. khanengr

    maintenacne schedule of HVAC Chiler system

    Dear All, I am an electrical engineer, and I am confort with the challenge of planning and scheduling maintenace activities of newly installed HVAC system, whose system specifications are as follow, kindly help me in giving your valuable feedback that maintenance activites I have to perform on...
  6. khanengr

    Switchgear Vs MCC

    According to my inforamtion and knowledge, there is no issue whether you use MCC or Switchgear, but normally the MCCs contains Isolators (Switches) not Circuit breakers and over load relays with magnetic contactors. Which is usually preferred in motors case not in transformers casse, In...
  7. khanengr

    VFD Current Imbalance

    try adding harmonic filters, hope they resolve the issues...
  8. khanengr

    DC Resistance difference between phases

    if as I assume, all reading taken with correct measurement procedure and apparatus, can we say corrosion of winding wires is occuring so that the resistance is increased over all and more corrosion or oxidation between phase b and c??? what are the possibilities of it???
  9. khanengr

    Authority of HVAC System in Organization

    Hi all, I am an electrical engineer, working in an oil refinery, here the HVAC system comes under the authority of Electrical Department solely including total operation and maintenance, Last week I met another Engineer from a very reputed Fertilizer plant and he also told me that at his plant...
See more

Part and Inventory Search

Back
Top