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I was just thinking that maybe just maybe it might lower the temp of the motor but as you stated Edison "2 HP is still 2 HP" no matter what the voltage.

Sorry I forgot to mention that it is a dual voltage 230/460 volt motor. So you don't think it would be a step in the right direction changing to 460 volts?

Guys thanks for your response. I finally have convinced them that you either have to remove the third blade or pay to have it wired to 460 Volts which means piping and wiring to the 460 volt panel.

Thank you Edison123 Now I have enough "ammo" to state my case. S! Rip

Dayton motor XPFC, C face mounted verticle,1725 RPM 230 V 3 phase supplied by our 208 volt system (I don't buy the equipment management does) max amb 40, C insulation class B, FLA 6.3, nema nom eff 82.5% S! Rip

I used a Fluke thermal imager to get the temp reading. Fluke amprobe to get the current 7.1 amps S! Rip

We have a 2 hp motor connected to a gearbox that drives a 5' shaft which had two blades on the shaft to stir liquid in a 500 gallon vessel. Management decided to have maintenance install a third "more agressive" blade on the shaft and now the motor is drawing 7.2 amps and running at a temp of...

Thanks, the mag will be installed between the circuit breaker and VFD as always.

Sorry wrong question. The person asking ment to say between the drive and motor which we know is a no-no.

What is the big deal about using a mag starter ahead of a VFD to completely remove power to the VFD at the end of shift?

Thanks Guys, The transformer will be located at the main 2000 amp 208/120 volt 3 phase service. The motor (Air Compressor) will be in another room 200 feet away. Ground XO to the system ground. The load will be straight 460 volt 3 phase with a equipment bonding jumper necessary because the...

Perhaps I didn't make myself clear, I am stepping UP the voltage from 208 to 460 3 Phase, the name plate on the transfomer shows a 208 delta connection to H1 H2 H3 and a secondary connection 460/266 volt X0 X1 X2 X3 I only want 460 volt 3 phase to run a motor I need no neutral on the secondary...

I have a 175 KVA transformer to step up the voltage from 208 to 460. The nameplate reads Primary 208 Delta H1 H2 H3 Secondary 460/266 X0 X1 X2 X3 We have a 208/120 3 Phase Y system. I do not need a neutral on the secondary side. Will this transformer suffice?

I want to monitor amps on a 75 hp 480 volt 3 phase motor with a remote digital ammeter. Does it matter if I install the current transformer (doughnut) on the load side or line side of the VFD? Thanks.

Thanks guys now I have the "confirmed info" to present to the "Boss". We have a 600 amp 460 volt service that is "maxed out" and a 2000 amp 208 volt service that is about 70% taken hence the step up transformer. Looks like it's time to upgrade the 460 to about 2000 amps also. Thanks Again.

The manufacturer of the compressor has told our manager that 460 volts is the "industry standard" and they do not make a 208 volt version, which at 359 FLA would require a 400 amp service. They even sent an air dryer with a 5 HP motor at 460 volts, had they sent a 5 HP at 208 volts I could just...

The NEC says that a 125 HP motor at 460(480) volts has a FLA of 156 amps (3/0 conductors) What amperage am I going to need to feed the 208 volt step up transformer to get 156 (200)amps at 460 volts?

Our plant manager just informed me that he bought a 125 HP 460v 3 phase air compressor. The area it is to be installed has only 208v 3 phase. Don't worry he says, the salesman is going to give (sell) us a transformer that will step up the voltage to 460. Is this a good idea?

Thanks all for your input, I will check the small motor(s) amperage (they are not on VFDs) This is going to be interesting Thanks again.

In our plant we installed a Regenerative Thermal Oxidizer to "cook off" hazardous fumes from the dozen or so large kettle mixers. Previously each mixer's exhaust fan exhausted individually into the atmosphere. Now all of the exhaust fans are ducted into a main 4' round duct which has a 50 hp...