3 phase voltage

[mickeyrench]

an air conditioner is rated at 208-230, 124 mca. the building has 3 phase 120/240 with a red leg. will this supply be ok being over 10% on the voltage? the paper work has a min and a max on the voltage of 187-253. i was under the impression that there was a cut off of 10% over and under on the voltage. thanks for your replys.

 

[augie47]

3 phase

3 phase

187-253 sounds like you will be o.k. measure voltage to be sure.

 

[infinity]

Since your building voltage is within the operating range of the unit IMO you should be fine. If 240 volts were a problem the manufacturer wouldn't have included it in the acceptable voltage range.

 

[jim dungar]

an air conditioner is rated at 208-230, 124 mca. the building has 3 phase 120/240 with a red leg. will this supply be ok being over 10% on the voltage? the paper work has a min and a max on the voltage of 187-253. i was under the impression that there was a cut off of 10% over and under on the voltage. thanks for your replys.

The nominal supply voltages in the US are 120, 208, 240, 480, and 600V
The corresponding nominal motor voltages in the US are 115, 200, 230, 460, and 575V.

Do not try to use the +/-% tolerance of a device's nameplate to determine if it can be used on a nominal supply voltage. Just accept the fact that equipment voltages are slightly different than supply voltages.

In your case the equipment is rated for 230V and your supply is 240V, go ahead and wire it up (your equipment is also rated for use on a 208V supply).

 

[Jraef]

The nominal supply voltages in the US are 120, 208, 240, 480, and 600V
The corresponding nominal motor voltages in the US are 115, 200, 230, 460, and 575V.

Do not try to use the +/-% tolerance of a device's nameplate to determine if it can be used on a nominal supply voltage. Just accept the fact that equipment voltages are slightly different than supply voltages.

In your case the equipment is rated for 230V and your supply is 240V, go ahead and wire it up (your equipment is also rated for use on a 208V supply).

Bingo!

LOL, it wouldn't let me post that short of a message, so I had to add this superfluous BS....