Hi I'm working on a project for a client who needs to automate the feed from a conveyor into a densifier powered by a 250hp 480v motor. I've already installed a AB powerflex drive to the conveyor motor. Now all I need is a 0-10 or 4-20 analog signal to vary the rate of material dumping into the desifier.
The reason I need to monitor the load on the 250hp motor is that the material being dumped changes from day to day and some of the material puts a huge load on to the motor. The clients current setup relies upon an operator visually watching a l.e.d. amp readout (via a c.t. donut) and pressing a stop button on the conveyor until the amps lower to a safe level to press the start button on the conveyor to resume.
Obviously the current setup has its problems as I'm sure most of you can already imagine.
If fact, a 250hp motor was recently burnt up due to an operator "paying close attention and reacting quickly".
After that expense, the client decided on an automated processing solution and enter - yours truly.
So I want to find a product that can meter the amperage and output an analog signal that I can control the feed conveyor. Sounds simple...
I haven't found what I'm looking for . Can anyone recommend a device that can read the 250hp amps (over 300 amps under a load at times) and generate an analog signal , either 0-10, 4-20, or engineering units that I can have a plc scale?
Thanks for any suggestions.
Bennie
The reason I need to monitor the load on the 250hp motor is that the material being dumped changes from day to day and some of the material puts a huge load on to the motor. The clients current setup relies upon an operator visually watching a l.e.d. amp readout (via a c.t. donut) and pressing a stop button on the conveyor until the amps lower to a safe level to press the start button on the conveyor to resume.
Obviously the current setup has its problems as I'm sure most of you can already imagine.
If fact, a 250hp motor was recently burnt up due to an operator "paying close attention and reacting quickly".
After that expense, the client decided on an automated processing solution and enter - yours truly.
So I want to find a product that can meter the amperage and output an analog signal that I can control the feed conveyor. Sounds simple...
I haven't found what I'm looking for . Can anyone recommend a device that can read the 250hp amps (over 300 amps under a load at times) and generate an analog signal , either 0-10, 4-20, or engineering units that I can have a plc scale?
Thanks for any suggestions.
Bennie