answersLogoWhite

0


Best Answer

If your motor is rated for only 208 volts you may not be able to use 230 volts for it. It will run, but may shorten the life of the motor. Motors are rated with a 10% tolerance for voltage. This means that a 208 volt motor has a maximum voltage rating of 228.8 volts. So measure you voltage supply and see if it is below 228.8 with a good RMS voltmeter. If it is, you are good to go. If it is not there are two ways to make it work.

1. Put a high wattage ballast resister in series with the supply voltage to drop the voltage to the motor within range of 187.2 to 228.8 volts. To determine the value of the resistor take the Horse Power of the motor and multiply it by 746. This will give the wattage of the resistor, use one at least 20% larger. Next take the Rated Load Amps (RLA) or Full Load Amps (FLA) of the motor and divide it into the difference between 230 (voltage supply) and the 208 (rated motor voltage), this will get you close to the resistance value of the Ballast resistor you need to use. So a 1/2 HP motor with a 1.2 RLA will require about a 18 ohm, 500 watt ballast resistor. This is not the recommended method, but will work.

2. Install a Buck & Boost transformer rate for the HP of the motor that will Buck the supply voltage for the motor down to 208 volts. This is the recommended way and the only way it should be done. Any good commercial electrical supply house can help you properly size the transformer that you will need.

User Avatar

Wiki User

11y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: How do you run a motor 208 volts ac in a 230 volts suply?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

Should i Run pump on 115 or 230 volts?

That depends on what the suply is if your power suply is 230 then you run it on 230.


What is the maximum volts that can be used on a 208 230 volt motor?

You should not go above 240 volts for that type of motor.


How many Amps for 3 horsepower at 208 volts?

For a single phase 3 HP motor at 208 volts the amperage is 18.7 amps. For a three phase 3 HP motor at 208 volts the amperage is 10.5 amps. This figure is derived at by taking the full load amps at 230 volts and adding 10%. As the voltage goes down the amperage goes up. For 200 volt motors 15% is added to the FLA of a 230 volt motor.


Can you hook up 208 volts on a 230 volt motor?

Yes, a 230 volt electric motor can run on 208 volts. The horsepower will be lowered by .9 or to 90% of the nameplate rating. e.g. A 230 volt 10 HP motor will only produce 9 HP at 208 volts. Note: If motor sees a load equal to its' rated HP it will over amp and shorten the live of the motor and/or trip out on internal overload.


Can a 208 415 motor run on 230?

never heard of a 415 motor..


Why won't a 230-460 volt motor work on a 120-208 volt circuit?

Because its designed to operate at 230-460, not 120-208.


Can a 230 volt supply be reduced down to 208 volts?

Yes it can be transformed from one voltage to the other.


What size breaker for a 208 volt single phase motor that pulls 1.4 amps?

208 volts is not a common single phase voltage but you could just size your breaker to the capabilities of the conductor. 208 is normally a phase to phase voltage <<>> Many 230 volt motors can be connected to lower voltage supplies. These motors can be connected to supplies of 208 and 200 volts. The code requirement is that the 230 volt full load amperage of the motor be increased by 10% and 15% respectively for wire sizing and breaker selection. To answer the question you will need a two pole 15 amp breaker.


How do you convert 230v to 208 volts single phase?

A source of 208 volts can be obtained from any two legs of a three phase four wire 208 volt system. The two legs are classed as single phase 208 volts. The lead tags can be L1-L2, L2-L3, or L3-L1 all of which will give you 208 volts. Any of these lead tags to the grounded star point (wye) will give you 120 volts.


230 volt motor be rewired to run on 208 volts?

Check the manufacturer's spec. You might be able to get away with this. Beware though, a reduced source voltage will manifest itself in a higher current draw, which results in an increase in heating.


What is the rheem model rakb-024-jaz tonnage?

2 Ton Scroll Compressor 208/230 Volts 1-Phase (COPELAND)


Will a 208 volt 3 phase generator supply operate a 230 volt 3 phase motor?

Yes, but the motor's horsepower rating will not be reached.