Electrical Engineering - Advantages to 460v compressor

Author

Advantages to 460v compressor

c_navazio@yahoo.com

2008-02-08, 9:25 am

Can anyone explain what the advantages are to having a 460v/3 phase
over 208-230v compressor. This is in reference to air conditioning
equipment and I'm trying to determine why you would want a 460v unit
over 208-230v or 277v unit. Thanks in advance.

Gerald Newton

2008-02-08, 8:25 pm

On Feb 8, 5:52=A0am, c_nava...@yahoo.com wrote:
> Can anyone explain what the advantages are to having a 460v/3 phase
> over 208-230v compressor. =A0This is in reference to air conditioning
> equipment and I'm trying to determine why you would want a 460v unit
> over 208-230v or 277v unit. =A0Thanks in advance.

At 460 volts the current is less for the same power. Example: A 10 hp
208v 3-phase squirrel cage motor with FLA =3D 30.8 amperes requires No.
8 conductors while a the same motor at 460 volts ahs with FLA=3D14
amperes that requires No. 14 conductors using 90 degree C copper
conductors on a 75 degree termination.
Try my calculator at: http://www.electrician2.com/calculators/motor_ver_1.ht=
ml
The disadvantage is 460 volts is more dangerous to work around is less
commonly available especially for residential services.

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