Tim Ganz
Member
We have a new drive system that has 9 rolls that move a sheet product through one part of our process and the material wraps some rolls and lays over others.
The drives are all ABB ACS 800 series 7.5 HP and the data plate on the drive says input 6.9 amps and output is 8.1 amps.
We had an issue where each drive blew its line fuses which are 15 amp class J.
Each drive also has it's own brake resistor that is 44 ohms / 800 watts and 690 volts DC rated and they connect to the BRK + and BRK- terminals.
There is also a UDC+ and a UDC- terminal on each drive which links all 9 drives together by daisy chain.
I understand the process and working of the brake resistor circuit but what are the UDC+ and a UDC- terminal on each drive and why are the all linked togehter like that.
Also is the input fusing being 15 amp class j current limiting seems like it's not the right size for the drive.
It's 12 awg wire so I would think that would be a 20 amp fuse
sized to protect the wire and I would also think it needs to be time delay because the drive should do all the load protection am I correct on this?
The UDC+ and a UDC- terminal on each drive also have a 25 amp semiconductor fuse at each drive which I also don't understand the purpose.
Can anyone please provide me some insight into this system?
The drives are all ABB ACS 800 series 7.5 HP and the data plate on the drive says input 6.9 amps and output is 8.1 amps.
We had an issue where each drive blew its line fuses which are 15 amp class J.
Each drive also has it's own brake resistor that is 44 ohms / 800 watts and 690 volts DC rated and they connect to the BRK + and BRK- terminals.
There is also a UDC+ and a UDC- terminal on each drive which links all 9 drives together by daisy chain.
I understand the process and working of the brake resistor circuit but what are the UDC+ and a UDC- terminal on each drive and why are the all linked togehter like that.
Also is the input fusing being 15 amp class j current limiting seems like it's not the right size for the drive.
It's 12 awg wire so I would think that would be a 20 amp fuse
sized to protect the wire and I would also think it needs to be time delay because the drive should do all the load protection am I correct on this?
The UDC+ and a UDC- terminal on each drive also have a 25 amp semiconductor fuse at each drive which I also don't understand the purpose.
Can anyone please provide me some insight into this system?