Kind of anti-climax I guess. I could not contact the site engineer to check the suggestions, but he did contact AB. They came they fitted an "impact board" and everyone went home happy. So there remains a slight haze over what would have worked. I still maintain there was a fix somehow with the...
Thanx, I am witing to hear the rsults of the test with droop (typo DickDV) and disabling the Vector. The more I go into it and hear your comments, the more I believe there is an answer here. Thanx again for all your assistance.
Thanx DickDV. Have already told engineer, heading to site to get rid of slip and sens vector. There is a function called drop (inverse slip) more load, more speed drops, told hime to try that. As far as output volts, will advise him now. Will that just decrease the ability of the motor to hold...
Motor Name Plate details
Siemens, model D-91-056. 575V+/- 10%. 180A, 1792rpm. Anything over 50Hz causes the problem. When it happens, usually 8 mins into mix of 15 min mix (as the dough becomes stiffer) the power will instantly double and trips out on overcurrent. I too am getting some new details.
It would if I had an engineer who was being belligerent. It makes little difference other than it will not run at 60Hz!!
Have more data to post and I have an engineer heading back to site so I can get more info. Thanx for your continued help. Friday night says I am about to enjoy a scotch...
To dispell any doubt. This is in Canada where normal mains voltage is 575V. The drive is a 1336 plus II AB 575V, 250HP I think it will piss them off to put a transformer in !!
aolalde, I think you are heading the right way. In days of old with no clever stuff on the front i.e. a vector drive...
OK, here is the full story. I have a 1336 II 250HP drive powering a Siemens NEMA A 200HP motor. It is a mixer, mixing dough, 3,000lbs which has been done many times before. As the load is thrown up, the weight can cause regen, hence the extra size on the AFD. Again, nothing new. The acel is set...
I have recently stumbled into a problem. I admit that I am no expert on NEMA and or motors, I can control and write the code for one so long as it runs. Here is the prob. I have a 200HP Motor with a 250HP afd on it. The load an be erratic and in the past I have used a dynamic resistor to absorb...
