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  1. JG2828

    Continuous monitoring of stator insulation when the machine is offline

    I've seen this a few times. It injects a sub-harmonic signal through the generator and reads it to see if anything is grounded. I know ABB used to make one version, not sure if they still do. I think Beckwith Electric also makes one. Here is a paper on the topic...
  2. JG2828

    ABB REF615 TON(1) Timer

    TONGAPC1 is just a "time delay on" function block. You would need to build some logic in PCM600 using that. You would be better off using auto reclosing(DARREC). https://search.abb.com/library/Download.aspx?DocumentID=1MRS756379&LanguageCode=en&DocumentPartId=&Action=Launch
  3. JG2828

    Unresponsive Electrical Equipment Vendors

    Call the equipment manufacturer and tell them that the rep will not give you a quote. Ask if you can use a different rep or purchase direct.
  4. JG2828

    Excel - Looking for a formula please

    I wasn't sure how you wanted to display the data on the League tab so I added it to the Players tab by inserting new columns T and U after existing column S. T4: =INDEX(SORT(FILTER($A$4:$L$249,$L$4:$L$249=$S4,0),3,1),1,5) U4: =INDEX(SORT(FILTER($A$4:$L$249,$L$4:$L$249=$S4,0),3,1),2,5)
  5. JG2828

    RELAY WIRING QUESTION

    Can you use a double ferrule? If not, you will need to add the second wire somewhere else in that circuit.
  6. JG2828

    Multiple Relays Sharing Same CT

    Here is an example of 2 relays in series with FT test switches:
  7. JG2828

    Multiple Relays Sharing Same CT

    There is no issue with putting two relays in series on the same set of CTs. Even if the relay processor fails, the CT circuit will not be interrupted.
  8. JG2828

    Fiber network connection

    I don't understand the question. Are you saying that you have a fiber cable plugged into port 48? Each fiber cable has 2 fiber strands, one for transmit and one for receive. So you will need both strands in a fiber cable for it to communicate. It won't be redundant with just one fiber cable.
  9. JG2828

    Neat Website

    Probably this page: https://www.electronics-tutorials.ws/diode/diode_5.html
  10. JG2828

    AUTOCAD

    You could try changing from "model space" to "paper space". That usually gives you a white background with black lines.
  11. JG2828

    What am I looking at?

    I think it might say Bulldog Electric Products on one end and Detroit Mich USA on the other end
  12. JG2828

    Current Question

    The link states that it ships in 10 packs of 50 lights. So, you should be able to use larger wires to run from the controller to each set of strands. Don't run all 10 strands end to end. Run them in parallel, not series. I don't see any mention of them using aluminum wires. I'm guessing they...
  13. JG2828

    What is multiplexing in protection relaying?

    Each relay would use 2 fibers (TX)(RX), so you would only get 48 relays at each end communicating over 96 fibers. For things like line current differential, we usually use a channel bank (Zhone IMACS) to multiplex the C37.94 serial over fiber communications channels from the relays. It comes...
  14. JG2828

    ABB REG 316*4 Communication

    I don't think you can use the rear serial port to change the settings. Only the front optical port. You need the special serial to optical cable: https://new.abb.com/products/1MRB380084001 Serial interfaces • Frontplate interface for local connection of a personal computer • Back plane...
  15. JG2828

    Record set looping

    Can you post the file with sample data? I'm not even sure if you are using access or excel here.
  16. JG2828

    Relay RACIC (ABB)

    T2 indicates you need to use the Very Inverse curve on Figure 14. So if your setting is 0.1, use the 2nd curve from the bottom. Pickup time is on the left. Multiples of pickup (starting) current is on the bottom. So if your starting current is set to 1.25 and you inject 10x that (12.5A)...
  17. JG2828

    Miami Beach, Champlain Towers South apartment building collapse, Part 02

    Here is a download of the TikTok video for posterity sake. Stuff gets deleted from that site all the time. https://files.engineering.com/getfile.aspx?folder=968cab23-e6b2-4a2a-9575-f13660d8a168&file=download.mp4
  18. JG2828

    Pool Collapse

    I don't know much about concrete, but shouldn't there be some rebar in there?
  19. JG2828

    How is class defined?

    If you want to learn C++ starting at the basics I highly recommend this YouTube playlist: There are 73 videos, but they are broken down into short 8 minute lessons. https://www.youtube.com/watch?v=tvC1WCdV1XU&list=PLAE85DE8440AA6B83
  20. JG2828

    Problem with images

    I didn't have any issues with the test file. Is there any VBA code running already on the file that is causing issues?

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