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Is it possible to hook up a unit that is 208 volt single phase to a 240 volts 3 phase?
Any two legs of a three phase system are classed as single phase. If a 208 volt device is connected across two legs of a 240 volt system its current draw will be higher. It is not recommended to connect a 208 volt device to a 240 volt supply. Using a constant resistive load of 6000 watts for an example, the resistance of the unit at 208 volts has to be found. R = E (squared)/W = 7.21 ohms. Now using the formula to find amperage at this resistance I = E/R, 208/7.21 = 28.84 amp at 208 volts. If the 208 volt device is connected to a 240 volt supply the following condition happens. I = E/R, 240/7.21 = 33.29 amps. The device in now definitely overloaded and instead of its rated 6000 watts it is outputting W = A x V, 33.29 x 240 = 7989 watts almost 2000 watts more than the unit is rated at.
Using a 240 volt rated device on 208 volts is more forgiving and is done quite often. Using the same 6000 watts on 240 volts the resistance is calculated to be R = E (squared)/W = 9.6 ohms. If the 240 volt device is connected to a 208 volt supply the following condition happens. I = E/R, 208/9.6 = 21.67 amps. To check this connection's wattage W = A x V, 21.67 x 208 = 4507 watts or about 1500 watts below its rated output at 240 volts.
If the connected load is a constant wattage like a motor, the amperage and voltage will change to maintain the constant wattage. I = W/E. A motor rated at 6000 watts at 240 volts will draw 25 amps. A motor rated at 6000 watts at 208 volts will draw 28.8 amps.
The CEC states that if a 208 volt rated motor is connected to a 240 volt supply its full load current has to be increased by 10 % for its overload protection.
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If the three phase source is delta connected, and the neutral/ground is at the center tap of one of the phase windings, then there is 208 volts available from neutral to the third phase leg. In this case, there would be no mismatch of voltage, and the 208 volt load will operate as designed.
This particular configuration is not so common. It is sometimes used in a light industrial setting where a fourth transformer for the 120/240 split phase portion is not used - it provides 240 three phase delta only, 120/240 split single phase, residential style, and 208 single phase.
See related links below (High Leg Delta)
Note that 240 three phase loads are also not so common. In the case where 480 three phase is required in this configuration, then there is a step up transformer trio provided, ususally by the customer.
What else can I help you with?
How do you hook up 3 phase to a 10 hp compressor?
First you have to have three phase power coming in. 3 phase are three hot wires working together on a syne wave. If you have 3 phase coming in, hook the three hot wires into the compresser, if it runs backwards, trade places with two of the wire and let the third one alone and you should be running.
Can you put a 220 amp circuit breaker on a single phase?
No, 220 amp circuit breakers are typically reserved for three-phase systems. For a single-phase system, common amperage ratings include 15, 20, or 30 amps. If you need a higher amperage, you may need to install a subpanel with multiple lower-rated circuit breakers instead.
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.
240 volt hook up compared to 110 volt hook up?
Answer for USA, Canada and countries running a 60 Hz power supply service. For electrical panels the proper terminology is L1,L2,N. N is for neutral and it is this wire that is grounded. The voltage measurement from the L1 to N will give you 120 volts. Also from L2 to N will give you 120 volts and from L1 to L2 will give you 240 volts. Single pole breakers in the panel board starting at the top, alternate between L1 and L2 all the way down to the bottom. These breakers all have 120 volt outputs. If you plug a 2 pole breaker into two slots then you get 240 outputs because L1 and L2 are adjacent to one another.
Is there any way to get a 3-phase motored 15hp 120 gal compressor to work on any kind of residential hookup?
If the motor voltage is 240 you can hook 240 to any two motor leads then put a switch and a capasitor in series from one leg to the other motor lead.once motor starts open switch,the motor will be rated at 58% about 8.7 hp.Another way to do this is if you have another 3 phase motor the same size or larger ,hookup 240 to extra motor any two leads hook leads from motor to air comp start contactor.Turn shaft on extra by hand it will srart which will make a third leg "3 phase" I know this is working on a three phase wheel balencer for the last 8 years i don't believe i would want to "hand spin" a motor on a compressor... a bit hazardous! another factor here is the direction of rotation as most compressors are sensitive to this. the starting current on a motor of this size and the service it is in quite large, the best bet would be to find a replacement single phase (220V.) motor (matching rotation, speed and starting torque). one could always use a rotary phase converter, but this is a spendy and involved way to do the job.
How many batteries can you hook up and still have 12 volts?
You can hook up an infinitive number of 12 volt batteries in a parallel circuit and still have 12 volts.
How do you measure volts and amps?
Preferably with a multimeter. For amps you hook it up in series, for volts you hook it up in parallell. For Ohms, you'll need to have the item you want to measure separated fron the circuit.
How do you measure volts amps and ohms?
Preferably with a multimeter. For amps you hook it up in series, for volts you hook it up in parallell. For Ohms, you'll need to have the item you want to measure separated fron the circuit.
Can you use a Marine or RV battery in a Jeep?
As long as it's 12 volts and it will hook up it will do fine.
What is the best size hook to use for single crochet?
it is best to use an H or I size hook
How do you hook up 3 phase to a 10 hp compressor?
First you have to have three phase power coming in. 3 phase are three hot wires working together on a syne wave. If you have 3 phase coming in, hook the three hot wires into the compresser, if it runs backwards, trade places with two of the wire and let the third one alone and you should be running.
Can two generator be hook together to make 440 volts?
Not in any way that is easy. Just get a step up transformer from 220 to 440 Volts. Your current will be reduced by about 1/2.
How do you hook up a three phase welder?
Easy as one,two and three. There are four primary wires coming from you service panel.(provided you have three phase service) you can check by looking at the weather head on the roof. if it has three wires you have single phase but if it has four then you have three phase. the hot wires will be black,red and brown. the neutral will be white or green. the welder should have a manual that will give you the lead phase wire(most likely black to black) the other two hot wires can hook to any other hot wire. The neutral goes to the white or green and posts to the panel. If the welder has a switching power supply then you must have a three phase converter.
How do you do a single crochet in a single crochet?
It's exactly how it sounds. After starting the next row, put your hook in the chain of the next single crochet stitch, yarn over the hook and draw the hook through the loops. If you're still stuck there are some good instructional videos on you tube.
How to wire two 12 volt batteries to equal 12 volts?
You hook them in parallel pos to pos and neg to neg.
How do you hook up a car radio in a house?
You need an ac-dc converter to reduce your house voltage to 12 volts
Can you operate a 12volt devise from 2 12 volt batteries hooked inseries?
NO. Absolutely not, you must hook them in parallel. Two 12 volt batteries hooked in series will give you 24 volts with the same A/H of one of the batteries. Hook them in parallel and you will still have 12 volts and double the A/H of one of the batteries.
