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  1. thewellguy

    Looking for Informantion about a geothermal failure

    Hi All, I remember seeing a thread about the geothermal system failure at Sherman Hospital in Elgin, IL. I can't seem to find it, I thought it was this site but I could be wrong. Does anyone remember seeing that/can point me in right direction. Thanks
  2. thewellguy

    125" brass valve question

    Hi All, The more I read on different sites the more confused I get. A standard of the shelf full port 1.25" brass ball valve from any of the big box stores comes with a tag on it that read "600 WOG 150 SWP." I have read that the valve is rated for 600 psi on the net and that seems unlikely to...
  3. thewellguy

    Pump ID help

    I pulled a pump out of wet well yesterday and part of the pump info tag is missing. It was mounted on slid rails about 18' below grade and has a 3" discharge. It looks like a giant sump pump and has a cast housing. The whole this is painted light blue. I was able to get the following info...
  4. thewellguy

    bearing problems

    I will start by stating I'm not a motor guy, I'm a water well contractor. The problem that I have run into is that I installed a all new vertical water lube turbine with a vertical hollow shaft motor, in a new well and new controls. This is a 150 hp 460 volt U.S. motor and Abb acs550 series...
  5. thewellguy

    Pump corrosion

    I saw a new one today that has me stumped. I pulled a line shaft water lube turbine because it was off in prefromance. The pump is 5 years old. The iron pipe, stainless shaft, and bronze spider bearing all looked fine. When we took the pump apart we found that the bronze inpellers have...
  6. thewellguy

    Current unbalance with a VFD

    I have a site that is at the end of a feeder line that has lots of power problems with voltage fluxuation and current imbalance. Its a closed delta 460 phase supply. Every 2-3 years they burn up a 50hp submersible well pump motor. They had good motor protect but shut it off because the protect...
  7. thewellguy

    Electric connectors?

    I know I have seen on job sites over the years underwater rated ecetrical plugs. The application was on a water fountian in a lake. In the fall they pulled the fountain to the shore, unpluged it and stored the fountian indoors. While the fountain was in use the plugs were under 15-20' of...
  8. thewellguy

    Weird power supply

    I was working in northern Indiana and ran across a power supply that I had never seen before. Its a 3 phase 480 system across the legs, but leg to ground it measures 390, 360, and 140. I thought they had a power problem but a local electrician said thats a normal supply for the area. My...
  9. thewellguy

    Question on VFD sizing

    I want to use a vfd to control a pump. The question that I have is that I have a 230 1 phase input and will be using a 230 3 phase output. The ASC550 ABB drive that I will be using calls for a 50% derate on the drive. The question is what size fusing is required, full load of the drive that is...
  10. thewellguy

    Breaker sizing for VFD

    I install submersible motors for well pumps. According to the motor manufacturer a 20 Hp 460 3 phase motor can pull up to 30.3 amps and should be installed on a 70 amp breaker. My question is if I am putting the motor on a ABB VFD model acs550-u1-031a-4 which is only good for 31 amps, what...

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