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  • Users: guilio2010
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  1. guilio2010

    Edge Computing and examples

    I am having trouble really defining what “Edge Computing” really means and how it will improve my process. Example: If I have a controller at a remote location monitoring a pressure from a transmitter and based on a condition, it will shut off a motor and Alarm, how does edge computing on a...
  2. guilio2010

    High Voltage lines near transmitters

    So I’ll start with a basic question. If I had a transmitter near a HV power line (say 50’), is it possible that the power line could induce a voltage on the transmitter or power/comms wiring and cause false values? If I took a scope and noticed that the voltage readings increased as I walked...
  3. guilio2010

    What connection (delta wye) would be best

    I have conflicting opinions on this project. We are looking to need 3 phase 480v service mostly for process heating (225kW). We have other items such as lights, heat tracing, etc...which has me thinking Wye (multiple voltage requirements). Another individual in the this project said they want...
  4. guilio2010

    API (Application program interface) - ROC800

    I have been wanting to make a user program for the ROC800/Fischer (Emerson) products. I searched and asked around but can't find anything in regards to the API that is used for developing the user program. Does anyone know of where to get the software or if there are multiple software...
  5. guilio2010

    Self Exciting Alternators

    I want to confirm my thought process on the alternators we use. We have various engines with a 12180-SEN alternators. This alternator from my research is self exciting so we would just connect the battery positive to the Batt terminal post. From here, the alternator will adjust the charging...
  6. guilio2010

    MODBUS maximum wire length

    I'm going through calculations for various equipment and the one item I haven't found much information on was calculation the maximum distance for MODBUS communication based on wire size. I seen general rule of thumbs and basic equations in regards to data rate and distance, but I would think...
  7. guilio2010

    Lightning Strikes and design theory

    So I wanted to get some feedback or ideas on a recent lightning storm that caused damage on some equipment. During a lightning storm, a din rail of containing terminal blocks was damaged. In Pic 2 of the din rail, you see where a shield terminal block was connected but the contacts burnt...
  8. guilio2010

    Solar Panels, bypass diodes, and block diodes

    So I want to confirm my thoughts on a solar system array. Typically, solar systems have bypass diodes so that if an area gets blocked or damaged by light, current can flow around that area and still produce power. IE 5 panels 20VDC@1A in series would produce 100W or 100VDC@1A to the Charge...
  9. guilio2010

    AC drive question

    I have never used an AC drives before but I kind of understand the basics of it. I guess my question is more on the operation of the drive. We have a SVX9000 AF drive. I am going to take a trip out to see the unit and get more info, but curious as to how I can use this to my benefit...
  10. guilio2010

    DC voltage drop

    During a discussion it was brought up that if we had a 24VDC supply and a device that had a operating range of 9-30VDC, and the distance from our power source to the device was long enough to create a 10% Vdrop, it is ok to not increase the wire size as we are still within the 9-30VDC range. I...
  11. guilio2010

    Is there any DC breaker enclosure switch

    Apparently, I need a switch for 12VDC@15A for C1D2 area. I figure since we are using this as a 1 time per year, get a breaker enclosure, IE Eaton EFDC, and use that with a DC breaker. Apparently, I can't get this with a DC breaker, It can't be used for this application. The rating is 120VAC @...
  12. guilio2010

    Reading different hardware with 1 AI channel

    What device would I need where I can use a digial output to select what device I want to read into a single AI channel and then switch to another device to read into the same AI channel? The DO is 3.3V and 4mA and I was thinking that using a ssr that can work off that would work, but unsure if...
  13. guilio2010

    Material selection

    Looking to make a small gas combustion camber to burn NG. I was looking at stainless 304. Just wondering on thickness of the wall should be or would it be best to line it with ceramic? Is there another metal that is best to be used in a fire tube? Is there a thickness chart vs. BTU you want...
  14. guilio2010

    Small pressure driven generator

    A few years ago I remember seeing a small device that produces power from gas pressure. It wasn't any large, but it pulled gsa from I want to say 1/4" line and then after the drop, you would send it back into the gas stream of higher pressure. Anyone seen this before?
  15. guilio2010

    Motor calculations

    I'm going through old notes to remember 3 phase motors and it's not making sense and didn't know if I could get this cleared up. If I have a 7.5hp motor, 5.6kW, 3 phase. We'll assume .8PF and .9eff Voltage 480V, 277V LN In single phase: I = 5.6 / (480 * .8 * .9) = 16.2 A This is 7776 VA...
  16. guilio2010

    Solar voltage effects on equipment

    Will fluctuation in solar dc voltage cause failure in equipment even if the voltage is in spec? Ie, charging is at 28vdc and the days overcast causes the voltage to drop out to 25vdc and back up to 28 vdc throughout the day?
  17. guilio2010

    FM Approval 3611 - Instricially safe

    If you look at the ignition curve for resistive load, Figure B-1 page 28, I'm surprised by what the FM shows vs. some of the post that are listed on this site for intrinsically safe. Most intrinsically safe that I have worked with keeps the power minimal, in the mW, however, from the graph, 12V...
  18. guilio2010

    Starting a power plant

    In a deregulated market, how is a power company set up to sell to a particular commercial or residential customers? I'm PJM, you have all these options of different generation companies that you can choose and I'm wondering how they get on that list or if anyone here has experience in that...
  19. guilio2010

    Schneider Electric scadapack

    Anyone ever use one of these? Thoughts compared to other brands you used? Thanks, guilio
  20. guilio2010

    EEx d ia devices

    Wanted to bring this up to see everyones thoughts on this. If you have a device that is EEx ia, why would you need an explosion proof housing to make it EEx d ia? From my standpoint, you would take your PWR/Inputs to an IS barrier to the device. If ia is designed and certified for use in...

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