Answered the question.
Ship originally installed the 3000 gpm sea water pump with load of close to rated gpm. About a year later AC chiller condenser tube went so they change it to FW cooled. This left
SW pump with little load but close to shutoff head was still needed to cool another AC...
Gentlemen, I should remember this from school but its been 30 years. I have a 3000 gpm centrifugal pump that the only way to get the head needed is to reduce flow. But this causes many thrust problems with broken shafts. Slowing down the speed of the motor will reduce flow but how much will it...
What will happen over time to a motor rated at 400 VAC 50hz operating at 480 vac 60 hz?
Thanks
The C/E on the Kocak
http://www.msc.navy.mil/inventory/ships.asp?ship=113&type=ContainerRollonRolloffShip
I have a dozen or so motors up to a couple hundred HP each time my ship is in the shipyard. Disassemble, clean, measure bearing fits- repair if needed, bake the windings, reinsulate, meg-if below 100M rewind. Cost is a few hundred instead of a few grand for a rebuild and down time.
As far as...
Thank you all for the rapid response. I'm a new member here. A Chief Engineer on a US flag steam powered merchant ship.
All the info you have provide points that my 1800 RPm motor will handle the load. Original in service motor is 15 HP the 1800 is 25 HP. These Worthington LRV type pumps are...
I have a Worthington centrifugal pump running at 1200 RPM moving sea water. I have a electric motor that will mount up perfectly that turns at 1800 RPM. I want more flow, without changing the pump what will changing the speed do? The Worthington manuals pump curves are set up for a specific RPM...
