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 TugboatEng 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: meeko
  • Content: Threads
  • Order by date
  1. meeko

    calculate 3 reach points on offset mho circle?

    hey there, was doing a reach test on a SEL relay today with a RCA of 79.6deg., Z1 = 1.43, after some calculations i came up with these values below. this worked fine for finding 1 single point of the offset mho circle. I couldnt figure out how to calculate another point on the circle to test at...
  2. meeko

    impedance circle calc help

    hey, looking for some way to figure out the answer to this problem. but a source to learn it or an explained answer would be greatly appreciated. " - A simple single phase impedance relay is set for Z=(R-1)^2 + (X-2)^2 = 4. It protects 2 lines. The first line has an impedance of Z =.5 +j2. The...
  3. meeko

    PF question- hellp

    can anyone answer this problem for me, was asked it and i cannot get it right.. an industry has a load of 950kw with 57% PF. what is the value of reactive power flowing and what is the apparent power. I think-->( va= root(vars^2 + w^2) am i supposed to assume a voltage of 600v?
  4. meeko

    correct power factor with synchronous motor?

    Hi, I was wondering if anyone could give me an example how to correct power factor with a synchronous motor I know how to correct lagging pf with a capacitor bank, but in school never went over how to with a synchronous motor. If anyone has an example problem i could study with a 1500w synch...
  5. meeko

    4-20ma induced current - increasing values?

    Hey guys, got a good question that has me stumped. was at a trouble call for some odd readings from a flow meter. -So, there is a flow meter with a little propeller in a 6" pipe, this sends a frequency signal to a GF signet 5500 flow transmitter which also displays the flow consumption. -This...
  6. meeko

    splitter box on skm power tools-

    hey, very new to skm, and this is my first project using this software, just wondering if there is a component for a splitter box on skm, im using 6.5 and cant find one anywhere, or what is the substitute, thanks
  7. meeko

    Home made VLF? or DC Megger?

    Hey, I am currently looking into creating a tesla coil, and now that i have gotten started, i would rather build a VLF test set, since they are quite rare around here. Was wondering if anyone here new if you could make a vlf test set with a high voltage transformer, operating with regualr...
  8. meeko

    relay differential protection - finding slope? Knee?

    Hi, I am trying to test a relay (GE multilin 745) for diferential protection. I am able to confirm it picks up on differential with a setting a of .3 X CT(5) - and picks up at 1.55 for both W1 and W2 abc. My problem is trying to find the slope of the relay. I then apply 5A to W1 and 2A to W2...

Part and Inventory Search

Back
Top