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  1. By "section 6", "section 8.1" I meant section 8.1...

    By "section 6", "section 8.1" I meant section 8.1 of the user manual I linked earlier. Sorry about that.

    Yes, you need to configure the motor nameplate data. It's possible that it will lock you to...
  2. Do you mean the dial on the front, or an external...

    Do you mean the dial on the front, or an external potentiometer?

    You want section 6 of the manual, parameter 00-05. Default is '0' - the up and down arrows on the keypad. You could also use '1' -...
  3. https://www.tecowestinghouse.com/Manuals/L510_inst...

    https://www.tecowestinghouse.com/Manuals/L510_instruction_manual.pdf

    Page 4-20, set parameter 13-08 'Reset Drive to Factory Settings' to '1260'.

    What control wiring do you have? Are you using a...
  4. I'm not sure sorry. These were just DC gearmotors...

    I'm not sure sorry. These were just DC gearmotors driving conveyers, driven by cheap KBIC driver boards. They equipment was on its way out anyway and is being replaced.
  5. It will cause nuisance tripping of RCDs and GFCIs...

    It will cause nuisance tripping of RCDs and GFCIs if present, and a shock hazard if the machine earth is faulty.

    I have seen it deteriorate to the point of blowing up speed controllers. Not sure...
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    We did more or less this in sparky school, just...

    We did more or less this in sparky school, just with a power factor meter instead of a scope. For what it's worth, I don't think there was any difference between the moving-coil analogue meters and...
  7. I'm more saying that once you're at a voltage...

    I'm more saying that once you're at a voltage that can be lethal, you might as well do it properly.
  8. That's a UK thing. It means the voltage to ground...

    That's a UK thing. It means the voltage to ground is low enough that it's very unlikely to cause serious harm even if you touch it. It does require transformers more-or-less at point of use though.
    ...
  9. Ah, yes. AS/NZS 2.6.3.1 We generally only...

    Ah, yes. AS/NZS 2.6.3.1


    We generally only use the integrated ones for retrofits (where it is only the extension that needs protecting) or medical. One of the many things that surprises me about...
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    Well, no. Because step 1 will be "how much...

    Well, no. Because step 1 will be "how much current is it drawing", and step 2 will be "that's about normal for a motor of that size, unloaded". I'm sure that, somewhere in the first hour of any...
  11. The control voltage change doesn't change...

    The control voltage change doesn't change anything other than part numbers. You still need two contactors.

    It can be helpful to draw your diagrams as separate control & power drawings.
  12. Ouch. Average around here is an outage of an hour...

    Ouch. Average around here is an outage of an hour every two years...

    But no, this is 'whoops my fluoro ballast failed' type issues - the kind that will trip a GFCI but not a breaker.
  13. Ground fault monitors for ungrounded systems are...

    Ground fault monitors for ungrounded systems are very different to GFCIs.

    Isolated systems are single-fault-safe. That is, you can touch any one wire and not get a shock, earth any one point and...
  14. It's still a centre-grounded supply and that's...

    It's still a centre-grounded supply and that's what's important. Loads don't otherwise care or know what the supply is and it doesn't really matter.

    I know larger ABB & Siemens drives have screws...
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    The point is that that doesn't matter what the...

    The point is that that doesn't matter what the phase angle is for the I^2R losses in the windings.

    E.g. if you have 100A going through some cables to a PFC capacitor bank, that current is entirely...
  16. Yeah, explosion rated motors usually have a lower...

    Yeah, explosion rated motors usually have a lower rated operating temperature if mains fed vs VFD, due to the harmonics causing additional heating. Likewise, manufacturers often have literature about...
  17. These look like brushless DC motors. You need...

    These look like brushless DC motors.

    You need specific driving electronics, and they likely spin at several thousand RPM.

    You probably want a small brushed DC gearmotor.
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    The reason why I^2R works and V^2/R doesn't is...

    The reason why I^2R works and V^2/R doesn't is that the most accurate model of an inductor is generally as elements in series - each element gets the same current, but not necessarily the same...
  19. 10HP, 7.5kW. Or you might be looking at the...

    10HP, 7.5kW.

    Or you might be looking at the alternate 50Hz rating.
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    Take DC resistance of the windings. Multiply by...

    Take DC resistance of the windings. Multiply by current squared. Whatever happens inductively, that heat is getting dumped into the stator windings. It's wire with amps going through it. Heat...
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    Measuring current with an ammeter is an entirely...

    Measuring current with an ammeter is an entirely valid approach. The current it measures is the same current that is heating the motor windings, heating the supply cable, heating the thermal trips in...
  22. 61kVA is not going to run off a 200A 240V single...

    61kVA is not going to run off a 200A 240V single phase service no matter what. That's 48kVA.

    You need a big generator or a service upgrade, and in both cases it's probably best to go straight to...
  23. We have a fair number of boards around here built...

    We have a fair number of boards around here built with Westinghouse Quicklag breakers. They are what is now US Eaton type QC. They're awful boards, with poor terminals, loads of exposed busbars etc....
  24. Synchronous = runs at exactly the supply...

    Synchronous = runs at exactly the supply frequency, or a divisor thereof. So a 2-pole motor on 60Hz runs at 3600RPM, 4-pole at 1800RPM. These tend to have issues getting up to speed - sometimes...
  25. Yeah, the rotary disconnect is what I meant. I...

    Yeah, the rotary disconnect is what I meant. I tend to deal with stuff where we have an isolator per motor, rather than per machine.

    Breakers don't have to be used solely as breakers. Larger...
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