Roots blower overloading, tripping breaker
Roots blower overloading, tripping breaker
(OP)
Hello, I run Recycling plant here in Florida. We use our roots blower in a unique way. We pump air into a water tank that cleans the plastic. The Piping runs through a manifold into several pipes that feed the tank with air. The Pipes have holes in the bottom of them and blow the air towards the bottom of the tank to create a vortex swirling the water and cleaning the plastic. For the past 18 months we have had no issues. However, we had to shut down for about 6 months and now on startup the blower will work for a few minutes then trip the breaker. It is over amping. We have not changed the configuration at all since the shut down and dont' know why this is happening now. Any suggestions. ?? It is a RAI-65 with a 20hp Motor.





RE: Roots blower overloading, tripping breaker
On that basis it seems you might either have a small blockage causing even a small increase in pressure taking you over your 20 hp or you have a reduction in flow.
You need to be able to measure flow and pressure, or at least pressure and speed of your blower to see where you are on the power curves in the link above.
My guess is that in 6 months downtime something has blocked up some of your pipes or holes.
Has anything else changed? - Depth of water, viscosity of whtever is in the tank?
do you have any filters inlet or outlet which could be clogged? did anyone stuff a rag down the pipe to seal it when you mothballed the plant? Are all the manifolds still connected as before? Anything else different which could give you a rise in pressure, even of one or two psi
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Roots blower overloading, tripping breaker
RE: Roots blower overloading, tripping breaker
RE: Roots blower overloading, tripping breaker
RE: Roots blower overloading, tripping breaker
It can seem counter intuitive but for a PD blower like this the less flow / higher pressure the more power it uses. As its a fixed speed motor then the motor will simply take whatever it needs to try and maintain a fixed speed.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Roots blower overloading, tripping breaker
Coarse Bubble Aeration are clog resistant:
http://www.xylemwatersolutions.com/scs/usa/en-us/p...
RE: Roots blower overloading, tripping breaker
RE: Roots blower overloading, tripping breaker
RE: Roots blower overloading, tripping breaker
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.