Felder RL125 portable dust collector. It's just a 4 hp 220 volt one speed, one direction, single phase motor turning a fan really. No problems with it, just curious why all the complexity for something so simple ?
The black device on the right has two blue pneumatic lines...and yet there is no pneumatic connection on this model. And believe it or not, there is even more complexity behind the buttons...at least two large capacitors (like half the size of a beer can each) back in there.
My guess is the black device has something to do with monitoring air flow and therefore shutting down the motor if the filter gets too clogged. But all the contactors, a timer and large capacitors ? The capacitors could be for starting/running the single phase motor (rather than having them on the motor) but all the complexity in there makes me wonder if the fan motor isn't really a 3 phase motor and this is Felders method of creating their own little phase jump box inside ? I hope not, since that would mean I don't really have 4 hp. What say ye ?
http://www.felderusa.com/us-us/prod...lean-air-dust-extractor-rl-125--Ø-125-mm.html
It is interesting that in the manual it shows the standard 3 phase model with a simple box mounted on/off rotary switch. So all this complexity for the single phase model is suspect indeed. (FWIW, the single phase version is $200 extra)
The black device on the right has two blue pneumatic lines...and yet there is no pneumatic connection on this model. And believe it or not, there is even more complexity behind the buttons...at least two large capacitors (like half the size of a beer can each) back in there.
My guess is the black device has something to do with monitoring air flow and therefore shutting down the motor if the filter gets too clogged. But all the contactors, a timer and large capacitors ? The capacitors could be for starting/running the single phase motor (rather than having them on the motor) but all the complexity in there makes me wonder if the fan motor isn't really a 3 phase motor and this is Felders method of creating their own little phase jump box inside ? I hope not, since that would mean I don't really have 4 hp. What say ye ?
http://www.felderusa.com/us-us/prod...lean-air-dust-extractor-rl-125--Ø-125-mm.html
It is interesting that in the manual it shows the standard 3 phase model with a simple box mounted on/off rotary switch. So all this complexity for the single phase model is suspect indeed. (FWIW, the single phase version is $200 extra)