Baldor 1/2 Hp Motor M3538 1725 Rpm 5/8" Shaft 230 V Logo
Jeff Leyva Posted on Jul 27, 2014

How To Interpret Or Read Nameplate On 3 Phase Motor?

Have a burnt 3 phase motor that nameplate is RPM 3450 230/460V PH 3 AC Motor And want to replace it into RPM 2800/3500 200-230/380-415v ph 3 Multistage Turbo Blower I wander what rpm would be of the to be replaced motor that sticker marking is 380v 50Hz if i connect it into 220v or 230v? What would be the advantage or disadvantage of using a motor that 380 volt connected into 220v or 230v. I tried to connect it at 230volt and it runs good. Thanks in advance.

1 Answer

A

Anonymous

The higher the voltage the lower the amperage, so advantage is its more cost effective to run it at highe voltages since power consumption is I squared x Resistance. The resistance will be the same but the lower the current the less it cost to run it.

1 Related Answer

Joe

  • 55 Answers
  • Posted on Jun 12, 2014

SOURCE: How To Convert Y Connection 3 Phase Motor Which Burnt Into A Delta Connection?

Delta is entirely different connection.... look here:

https://www.google.co.uk/search?q=3+Phase+Motor&es_sm=122&tbm=isch&tbo=u&source=univ&sa=X&ei=TWKZU9jpJobSOe3lgdAD&ved=0CEMQsAQ&biw=1534&bih=846

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2 speed switch wiring dieagram

The motor will have wiring diagram and voltage on nameplate.
You can re-post question with information that shows on nameplate for more exact information, or keep reading below:
If motor is rated for 240Volts, then it will not work with 120V.
If motor is rated for both 120V and 240V, then either Low voltage or high voltage will work, and one wire will be common, and 1 wire will for 120 and other wire for 240.
If motor is rated 120Volt two speed, then one wire will be neutral, and 1 wire low speed, and other wire high speed. You can connect your wire to either low of high, and cap other wire.
If motor is 240volt two speed, then one wire will be common, and 1 wire low speed, and other wire high speed.
If motor is rated 3-phase, then all three wires are connected to the voltage shown on nameplate.
If motor is rated 3-phase two speed, you may need electrician to wire the motor correctly.
http://waterheatertimer.org/pdf/AO-Smith-motor-wiring.pdf

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

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265 is the standard nameplate voltage for a 277 volt motor or AC unit.

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Most electricians call the hot leg / neutral circuit "277V AC".

Some popular "Buck-Boost" transformers will convert 208 to 240 and 240 to 208 volt systems, and 240 to 277 and 277 to 240 volt systems - among many other variations. These are auto-transformers as the primary secondary windings share a connection. KVA ratings differ significantly from name plate because of this fact. You should contact a qualified electrician to not only size, but wire the transformer for you. Failure to install a Buck-Boost transformer - and running this unit on 240V AC mains will cause premature failure of motors - fans and compressor due to overheating. This can also result in a fire hazard.

I hope this helps and good luck!
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I want to take to my home but I only have single phase 220, what can I do.

Hi,
You can build or buy a single to three phase converter....

http://www.metalwebnews.com/howto/ph-conv/ph-conv.html

If you want to buy then just do a search and many will come up...

You size them by amp. draw... the amp. draw will be listed on the motor nameplate...

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