Voltage

[Alwayslearningelec]

This equipment says 230v. Does that mean a 208v panel would be the same?

https://www.northerntool.com/shop/tools/product_200510918_200510918

 

[LarryFine]

Do you mean to ask whether it will operate on 208v? The specs only say 230v.

I'd say you need to look at the motor plate or ask the motor manufacturer.

 

[infinity]

The FAQ page says no to 208 volts.

 

[Alwayslearningelec]

Is this enough to size VFD and what's the calculation used if so? Thanks
Sorry meant to post this in my motors/vfd thread.

 

[Alwayslearningelec]

Do you mean to ask whether it will operate on 208v? The specs only say 230v.

I'd say you need to look at the motor plate or ask the motor manufacturer.

Yes, so my ques

Do you mean to ask whether it will operate on 208v? The specs only say 230v.

I'd say you need to look at the motor plate or ask the motor manufacturer.

Yes how we( or what I've seen most all the time with panels) is 120/208 or 277/480. So how would you know which(208 or 277) would operate at when something is listed as 230v. Believe I've also seen 240v listed before for equipment.m

 

[Alwayslearningelec]

The FAQ page says no to 208 volts.

So you'd have to go with 277v?

 

[LarryFine]

Yes, so my ques

Yes how we( or what I've seen most all the time with panels) is 120/208 or 277/480. So how would you know which(208 or 277) would operate at when something is listed as 230v. Believe I've also seen 240v listed before for equipment.m

First, 230v motors expect 240v supplies. Don't let the 10v difference bother you.

Second, those voltages ("120/208" or "277/480") are 3-phase wye system voltages.

Most modern 3ph motors are rated for a range that spans 208v through 240v, etc.

The compressor in your OP is expecting a 240v 1 phase supply (or 2 lines from 3ph).

 

[LarryFine]

So you'd have to go with 277v?

No, you need to boost the 208v up to 240v, such as with a buck-boost transformer.

 

[Alwayslearningelec]

Thanks so Neither a 208v or 277v panel with direct feed(no xfmr) would work?

 

[retirede]

Thanks so Neither a 208v or 277v panel with direct feed(no xfmr) would work?

As a former EE at a compressor manufacturer and familiar with the company referenced, I’ll offer this:

Most industrial compressors are sized at 110% of the HP of the motor nameplate HP (which has a 1.15 service factor). This means that a 230V unit will not give the same operating life when powered by 208V.

However, most compressor applications rarely utilize the full output of the compressor. Using a 230 volt compressor on a 208 volt system will be satisfactory 90% of the time thanks to the less than 100% duty cycle.

Short answer, the motor won’t last as long, but will likely be satisfactory (it will last the warranty period).

 

[Alwayslearningelec]

As a former EE at a compressor manufacturer and familiar with the company referenced, I’ll offer this:

Most industrial compressors are sized at 110% of the HP of the motor nameplate HP (which has a 1.15 service factor). This means that a 230V unit will not give the same operating life when powered by 208V.

However, most compressor applications rarely utilize the full output of the compressor. Using a 230 volt compressor on a 208 volt system will be satisfactory 90% of the time thanks to the less than 100% duty cycle.

Short answer, the motor won’t last as long, but will likely be satisfactory (it will last the warranty period).

Thank you. Informative!

 

[topgone]

So you'd have to go with 277v?

Careful with your selection of ratings. I once had an electrician who re-wired a 6-leads motor into wye connection seeing the nameplate rated voltage of 440V (IIRC, the motor was bought from Brazil). Our system was 480V and the electrician thought the 460V is to high for a 440V motor! The motor almost got toast! The motor ran but was drawing more current than it would if the correct 460V was supplied (the motor tripped after a few minutes)!