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  • Users: olicg
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  1. olicg

    Hand Cranked vs Digital Transformer Turns Ratio

    Hi, I would like to know the relative advantages / disadv of hand cranked v Digital TTR sets available from various vendors. Any document would be of real help. Reply with points is also appreciated. Thanks in Advance, Olicg
  2. olicg

    AC three phase load bank

    I need to design a three phase AC resistive load bank for diesel generator load testing. I dont have time or budget to go for buying a load bank. A temporary made bank would serve the purpose. I was wondering what loads to use, what type of cooling to provide, etc. Can someone refer me any...
  3. olicg

    High versus low voltage C&DF testing of HV transformers and bushings

    I was looking for a paper or an IEEE standard for a comparison of low versus high voltage C&DF testing, but could not find anything of value on net. Which is more effective? I think all the latest standards recommend at least 10 KV testing for HV transformer and bushings except for the power...
  4. olicg

    C&DF testing of HV bushings

    I have posted this question as eariler as well but it could not get attention of anyone. Maybe too important and interesting discussions were on at that time to notice this rather simple thing. I wanted to test 138 KV CT/PT bushings for Tan Delta / C&DF test. We have Biddle 2.5 KV, 12 KV and...
  5. olicg

    C&DF testing of HV bushings

    How do we determine which test voltage is to be used for determining C&DF of HV bushings? There are two versions (or i should say, i know of only two) offered by different manufacturers : 2.5 kV and 12 kV Capacitance and Dissipation Factor Test Set. I need to know which one is used for which...
  6. olicg

    Power System Loading ~ Generator AVR Response

    How will the power system loading affect a generator's AVR repsonse? By loading, i mean depressed voltages and sudden downward changes in it. Generator running at max load with max permissible reactive power delivery. To rephrase the question: When a power system / grid is heavily loaded and...
  7. olicg

    Calculating reactive capability limits

    I wanted to calculate the Qmax limits for our generator which has following data: 170 MVA, 0.8 lagging to 0.9 leading, 15.5 KV rated terminal voltage. Ifl = 6333 A While searching on the net found a useful research paper which gives the following equation to be used: Q max (based on stator...
  8. olicg

    D-AVR and PSS testing and tuning interval at Power plant

    Is there any standard for performing testing and tuning of a power plant generator AVR/PSS? Or are there any practices around by any utility company. Thanks, Olic
  9. olicg

    Use of OPC servers with legacy DCSes

    The OPC based solution providers claim that through OPC they can replace legacy systems like TDC or INFI90 HMI with theirs. My question is that these systems were made before the OPC standard came into being, how these systems can connect through OPC. Thanks in advance,
  10. olicg

    Using one NGR for grounding of two generators

    Can one NGR of adequate rating be utilized for grounding two parallel connected generator neutrals? If yes, what be the adv and disadv for doing so? Thanks in advance guys!, olic.

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