As understand the manufacturer wants the overload to be set at the motor nameplate. the overload should then trip at 125% of what the overload is set at... the instantaneous breaker needs to follow 430.52 (3) exception no. 1... motor is design A- so I should be able to go up to 1300% if I understand what I’m reading correctly...
I agree with you there. If I understand 230.55 (3) exception one I should be able to adjust up to 1300% of the breaker handle? I haven’t set it in this picture, but that’s what I was inquiring about. I just really don’t want to have the drag motor trip out and plug up an 80ft legg, and another 30ft of the distributor pipe...
the leg motor Is on a soft start And Has a maxi tronic monitoring system. I didn’t not install this equipment, but as I understand this device will slow the leg motor down or completely shut it off if it begins to become overloaded. There is a buzzer and amp Meter that the guys who are running the equipment should be monitoring...however the drag motor on the top that I’m trying to set the ol and it for doesn’t have any monitoring. Word of mouth is the leg and the drag are rated the same bushel per hour, but no proof of this as there are no prints...
The exception is that your instantaneous trip setting can be no more than 1300% of the FLC of the motor. Your FLC is 45A so your inst. setting should be 585A or less. Ideally you start low and work your way up to the max allowed.
When I spoke to the rep at Schneider electric he said that the value should be turned up to the breaker sized inside of the bucket not the motor fla... I also thought that’s how I should set the it too, but I can’t even get it to hold at 528 amps with no product running through it.... if I go up to the next value 631 it will hold but I’m worried once product is going through it, it will trip and cause a big problem... schnider rep says I should be able to go up to 13x the 80a breaker...
Yeah tomorrow I planed on putting an amp meter on it to see what it’s pulling after start up... Yeah the existing one they did, had no gear oil in it, and only ran About 40,000bushel... It is turning the right way I believe as I heard wheat fall into the bottom of the bin. How would I check that? I’m not overly mechanically inclined, and there is absolutely no prints I have seen....
I agree with you the Schneider rep is confused... wouldn’t I only be able to go up to the 1300% since this motor is design a and not b? Yeah so I set the it at 528, and it tripped Instantly. if I go to The next value on the breaker 631 it holds, but it’s over the 1300% by 46amps. The max I should be able to adjust the breaker should be 585, but I don’t know how I would tell where that setting is because it jumps from 528 up to 631.... the existing system runs, but they do not have the it breaker orthe overloads set up correctly. the breaker is as high as it can go on setting 1x from manufacture, and the overload is set at 75 amps with #6 wire.... tho I costing system has different type of it breaker. I believe it’s type h and the type in my mcc are type b...
Wheat falling in the bin is a good sign that it is turning correctly.
Yeah, I’m not sure what are rpms are on our augers Motors, but we run A few different products including corn... this name plate is for the drag motor so it’s more like a belt with a a chain on it...
Yes I agree on the overload. that way your motor and conductors stay protected... by uncouple do you mean take the belts off and see if I can get the it breaker to hold at the lower value, or see if it trips instantly as well? I wired the motor I'm working on currently, so I'm pretty positive connections are correct. The old system seems to be wired correct as well. I just don't know why the old electrician set the values up so high in the mcc. I was hoping someone would have a some type of logical reason.... Yeah first thing the dam millwright did when he was filling the gear box was spill about 5 gallons on top, and down the side of the bin right where i was trying to work.... The guys I work with said that its full, but idk if the have checked to see if its too full.. looks like I will be doing more trouble shooting today... Corn harvest is here and I'm pressed for time, I would just really hate for the leg to get plugged because of me. I was wondering do you think exception in 430.52 wants you to use the full load current values given in 430.250 40hp motor shows its 52amps on 480 volts which would allow me to go up to 676amps? the dial I have it set on now is 631 and holding with no product running. as you said the In rush is what's tripping the breaker and they should have the drag motor up and running before they start running product through the drag, so if I can get it to hold at 631 because of inrush, it shouldn't be a problem once we start pulling product through as long as there are no mechanical issues causing the motor to overwork... or it being undersized...
