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  1. Speddmon

    MEP-002A and -003A main breaker

    No offence taken, I love a good discussion and hopefully the other members can gain some knowledge from the things said here. Not arguing, but the next statements you made are just that, your opinion. Let me give you some facts. If you lined up 20 motors from the same manufacturer you'll...
  2. Speddmon

    MEP-002A and -003A main breaker

    Nobody is doubting your knowledge, ability or skill with AC systems. But you are just not paying attention to what I am saying about starting current. Starting current is the same as the motor rated Locked Rotor Current (LRA) which is minimum 5 to 6 times or more of the motor rated Full Load...
  3. Speddmon

    MEP-002A and -003A main breaker

    I think you may have missed the point of what I posted above. New or old compressor doesn't change the physics of the motor. I don't think your meter is catching it as it's peak. 39 amps at start-up is way too low for a motor or compresor that has a running load of 12 amps without some kind...
  4. Speddmon

    MEP-002A and -003A main breaker

    That was my bad...I looked cross eyed at the TM and saw two different NSN's. They are the same breaker for the 002a and 003a. I verified this with a spare output box I have for an 002a sitting in my garage and the new 003a breakers I ordered. They are the same. There must be something going...
  5. Speddmon

    MEP-002A and -003A main breaker

    Not sure if you have any kind of hard start kit/ soft stater on your heat pump, but starting current typically is about 6 times the motor full load current. Your meter may not be fast enough to catch the peak current reading on startup. At 11 - 12 running amps, the starting current should be...
  6. Speddmon

    MEP-002A and -003A main breaker

    Then you know that the hard start kit is your cheapest and easiest option. Just like troubleshooting electricity, or A/C units. Start simple, then move to the more complicated issues. Start with the hard start kit and see if that accomplishes your goal before you re-engineer the generator.
  7. Speddmon

    MEP-002A and -003A main breaker

    I just came back through and read this post. You do realize that the main breaker for the MEP-002a and MEP-003a are DIFFERENT, right? That would explain why you tripped it out at only 30 amps regardless of where R3 was adjusted to. Even though they look the same, the 002a has a contact...
  8. Speddmon

    MEP-002A and -003A main breaker

    That is a very good idea. Thank you. Done.
  9. Speddmon

    MEP-002A and -003A main breaker

    That last sentence is the key point of my post. Like I said, I Believe the MEP engine is strong enough to start the motor, and the generator is probably heavy enough to handle the inrush of that large of a motor. But even at the 300% surge rating we assume they are capable of, the 10 HP is...
  10. Speddmon

    MEP-002A and -003A main breaker

    I was doing a little research on the internet this morning into your issue with the starting currents. I found some interesting information for you. I don’t think there is anything wrong with your main breakers, it’s just that you are trying to start a motor that is just way too large for the...
  11. Speddmon

    MEP-002A and -003A main breaker

    Those are some pretty odd readings you're getting. I'll guarantee the starting current of a 10 HP 3 phase motor is mugh higher then 28-32 amps. Typical rule of thumb is 6 times the FLA for the starting current. It sounds like your meter isn't capturing the peak reading. Either way, it's...
  12. Speddmon

    MEP-002A and -003A main breaker

    Have you had a chance to play around with the readings and settings yet? I completely understand if you've been waiting out the winter months. We've been having a long cold winter here ourselves. I'm getting anxious to see what your findings are.
  13. Speddmon

    MEP-002A and -003A main breaker

    Sewerzuk, Have you had a chance to play around with your generators yet? I am curious to know if the R3 was out of adjustment, and if so, did adjusting it fix your problems???????
  14. Speddmon

    MEP-002A and -003A main breaker

    :oops::oops:
  15. Speddmon

    MEP-002A and -003A main breaker

    Not quite, The relay trip is a function of how much current is flowing through the coil of the relay and nothing more. The main contacts of the breaker act as switching contacts ONLY. If you look at the schematics for the 003a you'll see that the current going through R3 is produced by a...
  16. Speddmon

    MEP-002A and -003A main breaker

    Ike, You are absolutely correct but you forgot to mention that a lot, if not all, newer AC compressors are using scroll compressors. Which by their very design start under almost no load. To everybody else, I just hung up the phone with an engineer at Heinemann about the breaker problems...
  17. Speddmon

    MEP-002A and -003A main breaker

    Speddmon is buying new breakers because I have several spare output boxes, and 4 of them are for the MEP-002a's. The only difference in the two boxes is the main breaker, and the number of times the power wires are wrapped through the CT/CVT assembly. So with getting two breakers from work at...
  18. Speddmon

    MEP-002A and -003A main breaker

    Have you gone through and properly done the R3 adjustment? It's quite possible that the R3 adjustment has something to do with the delay of the main trip setting. I'm not 100% positive about that though. I doubt that the control circuitry is seeing any kind of a surge and causing the trip, but a...
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