RedSnake,
We have been having this problem for months. And, there have been all kinds of problems with this press. The safety breaks on top of the press keep failing, and they have been replaced several times, and the only way to reset them is to turn off the lube systems to let them drain...
Still periodically tripping the soft starter. Nidec & Arisa are not working on it, onsite and remotely. I believe we need to do one of 2 things, use a VFD or bring in 480 VAC and tune the soft starter or replace it with another one with a higher volt/amp capacity. I do not believe they will be...
I want to thank everyone for your input. So far, the Soft Starter had not tripped since I adjusted the back pressure and adjusted the setting on the Soft Starter. I explained what I did in my last post in the attachment. I have learned a lot from all of your input.
Here is what I have today. Please read the attachment. https://files.engineering.com/getfile.aspx?folder=e0ee5efa-e977-487d-a58e-8ddd99bee592&file=Was_and_now_lube_and_overload_issues.docx
The service engineer from Nidec came in yesterday and was set on just replacing the motor starter and the soft starter. He was present to witness the soft starter overloading at start up and after using the hydraulic OL button to release the back pressure and reseting the soft starter OL, he is...
RedSnake,
The press manufacture still thinks the problem is with the softstarter. They are sending a support engineer to install a new motor starter and a soft starter. Very frustrating.
They will see for themselves this is useless. They need to do those things that you and a few others...
RedSnake,
I have attached a picture of the actual after reseting by the OL switch, that in turn dumpted the back pressure, then the overload on the soft starter would not trip. They were able to bring the press up after that...
I came in this morning and the operator could not run the press becuase the lube system kept getting overloads trips on the soft starter. We reset the soft starter and I asked the operator to trip this function called overload that would dump the back pressure. After doing this, the press was...
What if I run a separate feed just for this motor? A 480-volt feed to the top of the motor starter that feeds the soft starter. "Would the difference of 20 VAC be a problem?" It is not Delta, so there is no wild leg.
Of course, after I first verify the pressure readings and if the manufacture...
I agree with all of you, in other places in the factory, our bus voltage is 480. We are using a special transformer on this Servo press for some reason.
This press was designed and built to run in a country that uses 50 Hz. and was sold to someone in Europe who backed out of the sale and we...
You could be right about the extra load on the motor circuit caused by the higher rpm and possible oil flow restrictions, being it was designed for 50 Hz. I do not understand hydraulics very much, so I uploaded the hydraulic drawings. There are 3 of them, and it looks like I can only upload...
RedSnake,
99% of the time the trip occurs when bringing up the press, at a cold start or if the press was shut off for 10 minutes and then trying to re-start the press.
It is a lube pump, so it is the first pump to turn on before the main motor is turned on, and the lube pump runs constantly...
We are having some problems with having overloads on our soft starter that is connected to this motor.
We are feeding the Schneider Electric GVME22 motor starter with 410 VAC then it goes to the Siemens Sirius 3RW4026-1BB04 Soft Starter.
We keep getting overload trips on the soft starter and at...
