Hello gentlemen,
I was looking at a wiring diagram of crate stacker that got me curious and compared it to another machine that does similar hoisting and got some questions.
In attached imaged #125 the brake feed comes from a transformer and a safety relay through KB1 (24VDC coil with surge suppressor) which is energized by KIB1 (24VDC coil) which is connected to an Emerson drive. There's also MURR connected to the three phase line before it reaches the brake.
In attached image #126 the holding brake is connected directly to a Lenze drive. I read the manual and couldn't find anything about surge suppression but the drive handles the brake quite well with nor problems that I know of.
If it's any indication of the brake size, the first motor is 4KW and the second is 11KW.
1- Did the first application require that much surge suppression and what would happen if KB1 is connected directly to the drive, skipping KIB1? Remember KB1 has a surge suppressor.
2-What is the MURR suppressor protecting, KB1 or the brake or both?
Thanks
Kal
I was looking at a wiring diagram of crate stacker that got me curious and compared it to another machine that does similar hoisting and got some questions.
In attached imaged #125 the brake feed comes from a transformer and a safety relay through KB1 (24VDC coil with surge suppressor) which is energized by KIB1 (24VDC coil) which is connected to an Emerson drive. There's also MURR connected to the three phase line before it reaches the brake.
In attached image #126 the holding brake is connected directly to a Lenze drive. I read the manual and couldn't find anything about surge suppression but the drive handles the brake quite well with nor problems that I know of.
If it's any indication of the brake size, the first motor is 4KW and the second is 11KW.
1- Did the first application require that much surge suppression and what would happen if KB1 is connected directly to the drive, skipping KIB1? Remember KB1 has a surge suppressor.
2-What is the MURR suppressor protecting, KB1 or the brake or both?
Thanks
Kal