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#60821 - 01/13/04 01:25 PM Difference between 220v 230v and 240v tools?
sdyck Offline
newbie

Registered: 12/15/03
Posts: 44
Loc: Calgary, Alberta, Canada
What’s the difference between 220v 230v and 240v tools?
I picked the following comment off of a forum about compressors



“Cannot wire 240 from 110...

Whole different animal from home electrical.

240 is 3phase 110/220 is not...

I do know a 3phase motor consumes less electricity and
has less rotational resistance than a comparable 2 phase
motor.

Call a local electrician and ask if a 3 phase motor can be wired with your existing drop. If so GO for it...

BUT 15Amp (240) 3 phase is again NOT 30 amp (220)

Sorry look for a 2 phase motor....”



If I have 110/220 service to my house can I not run 240v tools? I sort of thought the 220v-240v or 110-120 was a range?

Thanks

SteveD


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#60822 - 01/13/04 01:32 PM Re: Difference between 220v 230v and 240v tools?
bonded Offline
I am DenisB

Registered: 12/16/03
Posts: 1656
hi

10 percent difference!

All can be used on residential 240v 220v 240v 208v ..but the results will vary slightly and also the longevity...but all of small or little consequence!




240v can be either residential single phase or it can be commercial 3 phase!

Our residential 'nominal' voltages are 120v/240v...208 in apartments etc

as the conditon of older distribution systems got worser they raised the voltage from 110 to 117...to 120 etc


Please provide the direct link for me

Motors of 230v will be fine on either 240v or at 208 volt single phase..but are optimised at 230v

230v motors are intended to operate on system voltages plus or minu 10% from 230v

that would be from 207v thru 253.

Tables for single phase motors at 230-240 are the same

230v motors ran at 208 v will have 10% higher currents

If you want optimal performance then replace with the exact voltage as on your present nameplate

whats your 'nominal voltage?

Have you ever seen any 208v receptacles and plugs?

208/220/240 tools will all work on circuits of 240 or 208v

when a catalog or peole say 220 and 240 they mean 240

When they say 208 they mean 208..nominal

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#60823 - 01/13/04 02:02 PM Re: Difference between 220v 230v and 240v tools?
DaveB.inVa Offline
member

Registered: 07/08/01
Posts: 160
Loc: Virginia
The first red flag is when someone calls single phase TWO phase! What comes in your house is single phase, two phase is long gone. It hasnt been used on a large scale for years. Today its used mainly for stepper motors and some electronics. With a 3 wire 2 phase service your voltages would be 120v to ground and 170v between phases... thats certainly not what you have.

Plus you pay for watts! Whether you are using 3500 watts from a 120v circuit, or 3500 watts from a 240v circuit or 3500 watts from a 240v 3 phase circuit... your still going to pay the same!

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#60824 - 01/13/04 02:24 PM Re: Difference between 220v 230v and 240v tools?
sdyck Offline
newbie

Registered: 12/15/03
Posts: 44
Loc: Calgary, Alberta, Canada
Thanks, the take away for me is that 3phase is commercial I'll stay away form anything that is 3phase for home use.

Ok here's my dumb question for the day. Is there a difference between single stage and single phase when talking compressors?

Thanks

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#60825 - 01/13/04 02:32 PM Re: Difference between 220v 230v and 240v tools?
bonded Offline
I am DenisB

Registered: 12/16/03
Posts: 1656
apples and oranges

apples and bricks..really!

One is the compressor and better $$$ mechanical design and the other is the electrical system voltage!

Single phase electrical supply is what you can expect in all residential single family systems

Two stage air compressors are what you need for 100--175 psi

Two or more cylinders in series.

The first cylinder compreses air into the second cylinder,which compresses it further and then pumps it into the tank.







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#60826 - 01/13/04 02:41 PM Re: Difference between 220v 230v and 240v tools?
bonded Offline
I am DenisB

Registered: 12/16/03
Posts: 1656
here are a comparison chart for what voltages are on a motor nameplate and the ideal system voltages that will maximize their efficiency and life.

NAMEPLATE VOLTAGES --------IDEAL SYSTEM VOLTAGES

115----------------------------------120

200----------------------------------208

230----------------------------------240

460----------------------------------480

575----------------------------------600

2300-------------------------------2400

4000-------------------------------4160

6600-------------------------------6900

When you connect a 208 v single phase motor across 2 legs of a 3phase 120/208vsystem found in apartment house sytems...this is considered a SINGLE PHASE connection!..and you will use a 250v rated plug 2 pole 3 wire grounding... just the same as in a residential 240 system at home!

If you connect a 3phase motor of 208v to all 3phases ..this is a 3 phase connection and an entirely different motor!!! ..entirely different plug

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#60827 - 01/13/04 02:53 PM Re: Difference between 220v 230v and 240v tools?
DaveB.inVa Offline
member

Registered: 07/08/01
Posts: 160
Loc: Virginia
Single phase is the electrical connection the motor requires.

Single stage means that if this is a piston type compressor then you only have one piston drawing air in and then driving it into the tank.

A dual stage compressor has 2 pistons. Air is drawn in by the big cylinder and then pushed into a smaller cylinder. The smaller cylinder from here pushes the compressed air into the tank. There are usually intercoolers between stages of compression to cool the air. Compression stages can be used on just about any compressor design like piston, centrifugal, vane and such.

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#60828 - 01/13/04 03:11 PM Re: Difference between 220v 230v and 240v tools?
sdyck Offline
newbie

Registered: 12/15/03
Posts: 44
Loc: Calgary, Alberta, Canada
Cool thanks. 3phase vs single phase would that be listed on the motor plate? or is their a more obvious way to tell?

SteveD

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#60829 - 01/13/04 03:18 PM Re: Difference between 220v 230v and 240v tools?
bonded Offline
I am DenisB

Registered: 12/16/03
Posts: 1656
Number of wires and it will be listed on the nameplate

Some 3 phase motors may have around 9 wires to configure!..maybe 12

Some dual voltage single phase motors may have around 6 wires or so...some only 2 wires and ground!
ernie

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#60830 - 01/13/04 03:31 PM Re: Difference between 220v 230v and 240v tools?
Pat_McBride Offline
Super Handyman

Registered: 07/12/01
Posts: 2014
Loc: Abbotsford, BC, Canada
Good post, Ernie and Dave! I'll try and get all that condensed, if I may, into a single post that we can place on the forum for all the newbies.

Pat
_________________________
Being able to watch horses and cows is God's gift to Man. Peace. Serenity. Calm

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