motors rated for 2400v 3 phase

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Ainsley Whyte

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Is it usually the case for motors rated for 2400 V-- 3 phase dual voltage motors also can be connected 4160 V three phase ?

or is it a strictly matter of checking name plate ?
 
No experience with medium voltage motors here, but in order to be 2400/4160 rated it about would need to be wye connected for 2400 and delta connected for 4160 I would think. This would put 2400 across each individual coil either way.

Is 2400 a common voltage other than line to neutral volts on a 4160 wye system?
 
kwired said:
No experience with medium voltage motors here, but in order to be 2400/4160 rated it about would need to be wye connected for 2400 and delta connected for 4160 I would think. This would put 2400 across each individual coil either way.

Is 2400 a common voltage other than line to neutral volts on a 4160 wye system?
Click to expand...
well I have a transformer which is 2400 V SECONDARY THREE PHASE SUPPLYING TWELVE LOADS.
I WANT TO UPGRADE BY GET RID OF THIS TRANSFORMER AND SUPPLY INSTEAD 4160 WYE SYSTEM.
BECAUSE PLANT IS NOW MAX OUT IN TERMS OF POWER
 
I want to convert the supply to these 12 loads instead from a 4160 V- transformer.
I am now checking all 12 loads motor nameplate if they are 2400/4160 V rated but most that I have checked they are.
Basically want to increase the power that the plant can supply. so we can add more loads.
 

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Ainsley Whyte said:
well I have a transformer which is 2400 V SECONDARY THREE PHASE SUPPLYING TWELVE LOADS.
I WANT TO UPGRADE BY GET RID OF THIS TRANSFORMER AND SUPPLY INSTEAD 4160 WYE SYSTEM.
BECAUSE PLANT IS NOW MAX OUT IN TERMS OF POWER
Click to expand...
Ok, seems you need to look at motor plate to find out. Like I said, for 2400/4160 it about would need to be able to be connected delta for 2400 and wye for 4160. If it were dual volts but series-parallel connnected then the low volts rating would be half the high volts rating.

Also not my area of expertise (medium voltages) but is your conductors and other associated gear able to handle the new voltage or will it need changed also?

Either way you still not adding more load then your service can supply, so you need to consider that as well.
 
kwired said:
Ok, seems you need to look at motor plate to find out. Like I said, for 2400/4160 it about would need to be able to be connected delta for 2400 and wye for 4160. If it were dual volts but series-parallel connnected then the low volts rating would be half the high volts rating.

Also not my area of expertise (medium voltages) but is your conductors and other associated gear able to handle the new voltage or will it need changed also?
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NO they cannot. Really what I would be doing is to build a new sub-station to house this new MCC Switch gears and other associated components
 
Ainsley Whyte said:
NO they cannot. Really what I would be doing is to build a new sub-station to house this new MCC Switch gears and other associated components
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Sounds more like an economics decision needs to be made as to whether you install all necessary gear to increase volts or to simply install additional 2400 volt transformer for more loads - and still need to consider if the service or other main distribution segment can handle the added load either way.
 
kwired said:
Sounds more like an economics decision needs to be made as to whether you install all necessary gear to increase volts or to simply install additional 2400 volt transformer for more loads - and still need to consider if the service or other main distribution segment can handle the added load either way.
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Good point really if you look at the drawing you would see a C12-12A PUMP RATED AT 250 HP now this pump is recommended by manufacture to increase to 1000 hp which would require 4160 V .

the 2400V WILL REMAINS UNTIL THE NEW SUB IS BUILD AND COMPLETED THEN SWITCH OVER
 
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LarryFine said:
Usually, dual-voltage means 1200/2400 or 2400/4800.

Nameplate reading is a must.
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Absolutely read the nameplate.
However 4800V is not a typical system voltage in the US.

Many lower medium voltage systems go up alternating delta to wye, such as 2400V->4160->7200->12,470V.
 
jim dungar said:
Absolutely read the nameplate.
However 4800V is not a typical system voltage in the US.

Many lower medium voltage systems go up alternating delta to wye, such as 2400V->4160->7200->12,470V.
Click to expand...

Just to be clear, 4800 is (was) very popular for a distribution voltage in some parts of the country (ie extensive regions of upstate NY) but ive never heard of it for non utility systems.
 
electrofelon said:
Just to be clear, 4800 is (was) very popular for a distribution voltage in some parts of the country (ie extensive regions of upstate NY) but ive never heard of it for non utility systems.
Click to expand...

I believe 4400 is used in Chicago, but neither would be called a common motor voltage, they would be called regional.
 
I've never seen an MV motor with dual voltage ratings. They are usually single voltage, either 2300V or 4000V (the utilization voltages for 2400 and 4160V supplies).
 
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