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Type: Posts; User: Jraef

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  1. Replies
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    718

    Inside, all of the electronics are potted in...

    Inside, all of the electronics are potted in black epoxy anyway. You can't see anything useful.
  2. Replies
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    718

    No, pushing the reset button would not have any...

    No, pushing the reset button would not have any effect on the thermal memory of the ESP100, or any other OL relay for that matter, it's a requirement for UL listing of the OL relay that is does not....
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    718

    5HP 230V 3 phase, your motor FLA should be around...

    5HP 230V 3 phase, your motor FLA should be around 16.7A. Whatever it says on the motor nameplate is what you must set the OL relay for if you want to protect that motor. If you turn it up, you run...
  4. Agreed, but most people don't have a variac. I...

    Agreed, but most people don't have a variac. I had one for years that I got at a flea market for $5 but it was stolen. I've been plumbing the depths of Craigslist and garage sales to buy another one,...
  5. Just a word of warning, if it has been sitting...

    Just a word of warning, if it has been sitting around with no power on it for 2 or more years, you could damage it just by connecting power to it. See if you can determine how long it has been since...
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    825

    Some of the high-end VFDs on the market have the...

    Some of the high-end VFDs on the market have the ability to store 2 sets of motor parameters, I don’t know of any that could store 3. The alternative would be to set up a VFD in simple V/Hz control...
  7. Voltage on a standard 3 phase induction motor...

    Voltage on a standard 3 phase induction motor will not make a significant difference in speed until it is loaded, because the base motor speed is determined by the frequency, which is going to be...
  8. Servo controllers do this too. It's called a...

    Servo controllers do this too. It's called a "Load Observer" functionality, but typically needs an encoder feedback (inherent in most servo drives).
  9. Higher end VFDs will do this for you...

    Higher end VFDs will do this for you automatically by the way.
  10. Replies
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    922

    There were 3 different version of the 160 SSC,...

    There were 3 different version of the 160 SSC, Series A, B and C. Yours is a B (pre-1998) since you have parameters that start with A or b. In that series there were a LOT of special versions made...
  11. Although I agree that a VFD is likely a CHEAPER...

    Although I agree that a VFD is likely a CHEAPER way to change speed on a DIRECT DRIVE situation, if there is any sort of belt / chain drive involved already, simply changing the sheave / sprocket...
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    For the most part, any of the "major"...

    For the most part, any of the "major" manufacturers make good products, otherwise they could not afford to stay in the VFD business. Support is expensive, support for bad products is REALLY expensive...
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    922

    Not true. You only need a TechConnect contract...

    Not true. You only need a TechConnect contract for drives tech support if you want it after normal business hours, M-F 8-5 CST. They will ask you the name of your company, but just give them your...
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    913

    Are you aware that for the 115V input version, an...

    Are you aware that for the 115V input version, an easily overlooked aspect of the larger 1-1/2HP drive is that it requires a 40A circuit breaker to feed it on the 115V side. Not easy to find and if...
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    825

    What type of compressors are they? Reciprocals...

    What type of compressors are they? Reciprocals can be problematic when reducing speed; most of them are mechanically oiled, so reducing the speed reduces the oil flow / splash lube capacity and your...
  16. Well, technically a control panel would not...

    Well, technically a control panel would not “convert 60Hz to 50Hz”, but what they might mean is that everything inside the control panel is converting to DC, so it doesn’t matter. So it’s likely that...
  17. Replies
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    825

    What is your goal in using a VFD on a compressor...

    What is your goal in using a VFD on a compressor at all? It’s not a good application for a VFD, especially if it’s a reciprocal type. The only reason to use one on a compressor is if you only have...
  18. Has this manufacturer assured you, in writing,...

    Has this manufacturer assured you, in writing, that the machine is OK with 60Hz power instead of 50Hz? Motors that are not on VFDs or Servo Amps will all spin 20% faster. That can be seriously...
  19. Replies
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    Technically, ALL VFDs can operate from single...

    Technically, ALL VFDs can operate from single phase power. A VFD just converts AC to DC, then recreates something that motors react to as if it is AC again ("pseudo AC").

    Where you get into...
  20. If that transformer is only feeding your two...

    If that transformer is only feeding your two service drops, then nothing you do is likely to affect your neighbors. It may affect YOU because you are on the secondary (LV) side of that transformer,...
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    642

    There are strict rules for sizing of OCPDs in...

    There are strict rules for sizing of OCPDs in dedicated motor circuits, laid out in the NEC table 430.52. If the circuit is not just for one motor, then it is a “Feeder” and the motor rules don’t...
  22. A VFD corrects the power factor of the motor on...

    A VFD corrects the power factor of the motor on the input, so the input current Is always lower compared to the output current rating, even more so with the voltage doubler because it adds even more...
  23. Most AC induction motors CAN be reversed, but the...

    Most AC induction motors CAN be reversed, but the mfr may not have allowed it to be, which they accomplish by not providing you with access to the connections to do it. That may be due to mechanical...
  24. Replies
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    What you thought were "caps" were what was called...

    What you thought were "caps" were what was called a "dash pot", and the oil was part of the system that made them function as an "overload relay". This type of system predates the common "heater...
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    The problem is that this is a single phase motor,...

    The problem is that this is a single phase motor, not a 3 phase. Solid State Soft Starters work GREAT on 3 phase compressors. But because of how a single phase motor starts, they are problematic. The...
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