What is a 240 volt 3 phase 3 wire grounded b phase system?
A 240 volt 3 phase 3 wire grounded B phase system is also called a quadraplex configuration. You actually have four conductors, not counting the protective earth ground, which makes five wires. Three conductors are the individual phase hots, A, B, and C. You can use them delta only, and you will have 240 volt three phase. The fourth conductor is neutral, and is connected to the center tap of one of the transformers, and also grounded at the distribution point. You then have 120/240 volt split phase with that neutral and the two hots surrounding it, which is the normal residential configuration for the US. You cannot connect a three phase load in wye configuration, because the neutral is not in the center of the power triangle. If you want a wye configuration, you will need three more transformers, with the primaries delta and the secondaries wye.
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It starts out with 480 Volts, which is used to power motors. 480 can be stepped down to 120/208/277. The 120 operates normal appliances, while 208 can be used for dryers and welders rated for 208. 277V is usually used for lighting circuits. 3-Phase is used in commercial and industrial settings.
only way to convert from 3 phase to 240 would be to change the electric motor on the compressor
In a three-phase, star- (or wye-) connected, system the linevoltage (line-to-line voltage) is 1.732 (or the square-root of 3)times the phase voltage (line-to-neutral voltage). The reason forthis is that a line voltage is the vectorial sum (not algebraicsum) of two phase voltages displaced from each …other at 60 degrees. These days, incidentally, the UK's nominal phase voltage is230 V, and its corresponding line voltage is 400 V. ( Full Answer )
Answer for UK, Europe and countries running a 50 Hz supply service. A voltage of 380 volts is not a standard North American voltage, it is a European system voltage. The 220 volts is the line to neutral voltage of 380 volts wye connected system. 380/1.73 = 220 As always, if you are in doubt about… what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. Further Answer As the original answer says, a line voltage of 380 V would result in a phase voltage of 220 V for a delta/wye transformation, but 380 V is not a standard voltage either in North America or in Europe. The standard nominal line voltage (i.e. line-to-line voltage) used throughout European three-phase low-voltage systems is 400 V . As European three-phase distribution transformers are always connected delta/wye, A 400-V nominal line voltage results in a 230-V phase voltage (line-to-neutral voltage). ( Full Answer )
Answer for USA, Canada and countries running a 60 Hz power supply service. . It doesn't need to be converted. The 240 Volt single-phase electricity is there already to operate any single phase devices. New breakers, the right size of wiring and a new wall outlet are what have to be installed to a…dd a new single phase 240 Volt circuit to an existing breaker panel which already has a three-phase supply. For safety reasons only a trained and licensed electrician should work with this equipment.. . Careful! The statement above can be misleading. The Asker is obviously not from the US, he thinks US 240V is three phase, when its really single-phase. But note that he wants to convert to single-phase with one hot and one neutral . This is consistent with European standards with 230V single-phase where one wire is hot and one wire is cold (neutral). You cannot connect a European 230V appliance directly to US 240V because this would connect a hot wire to the appliance's grounded connection, potentially making the chassis components hot!. So, while it is true nothing needs to be done to convert US 240V service to single-phase (because it already is), it is not correct to imply that US 240V can be used where you want 240 volts with one hot and one neutral. This would require an isolation transformer or other approved international voltage converter.. For more information see the answer to the Related Question Can you plug a 230V 50Hz appliance into a 240V 60Hz outlet? shown below. . As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. . If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use an electrician's test meter having metal-tipped probes (not a simple proximity voltage indicator) to insure the circuit is, in fact, de-energized. . IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. . ( Full Answer )
Most 3-phase welders cannot be made to function on single-phase power. If your welder is an inverter type, such as a Miller Dynasty or Lincoln Invertec, then it may have a single-phase mode with reduced current output. You would have to download the manual for your particular welder. If it is an o…lder transformer (big and very heavy), then you're probably out of options here. ( Full Answer )
How do you fuse dry type transformers for an open delta system used to transform 480 Volt 3 phase to 120-240 Volt 3 phase 4 wire?
one transformer is sized for 57.7% of the three phase load, the other carries 57.7 % of the three phase load plus all of the single phase load. find out the kva of your loads then size your transformers find the rated FLA of the transformers on the primary and secondary with Watt's law add t…he individual currents with vectors to find the phase currents primary and secondary then apply NEC 430.3(B) Wire is sized to carry the load and be protected by OCPD make sure the wire is protected via 240.21 (B) or (C) tap rules. There are too many possible combinations of primary/secondary protection and tap rules to give a complete answer, your solution will vary based on distance between overcurrent devices and the transformers and also with your choices in regards to transformer KVA sizing. A simpler solution that is lighter, off the shelf, simpler to install and probably cheaper is to use a single three phase transformer with a 240 wye/delta connection. I think that would also gain you some noise isolation. ( Full Answer )
RMS volts is the same for any type of AC voltage. Divide the magnitude by sqrt(2). The difference between the 3 phase system and single phase is the sqrt(3) voltage gain that the 3 phase has.
You will need a stepdown transformer to convert 3-phase 480V down to 120V. An electrician is going to have to do this. Answer It depends on the country in which you live. In European countries, for example, a 230-V single-phase supply is obtained between one of the three line conductors and the n…eutral conductor. No transformer is necessary, as European three-phase, four-wire, systems operate at 400/230 V. ( Full Answer )
208/120 is typical for the US, so these are the colors for the US:. A phase: black -------------------In Canada; A phase - Red. B phase: red-------------------------------------B phase - Black. C phase: blue -----------------------------------C phase - Blue. neutral: white ----------------------…-------------neutral: white. ground: green or green with yellow stripe ( Full Answer )
The current is based on the load amperage rating. This is true regardless of single or three phase or voltages.
You should not need a wiring diagram. If the generator has a star point (wye) connection then the phase voltage to ground (star point) is 277 volts. 480/1.73 = 277.
Answer for USA, Canada and countries running a 60 Hz power supply service. . It is a common electrical system that is used in commercial and industrial installations. In the US the voltages supplied are three phase, wye connected 480/277 volts. In Canada the voltages supplied are three phase, wye… connected 600/347volts. ( Full Answer )
3 phase panel double pole single throw breaker 2 wires from breaker going to lighted sign 120 volts each is this a 240 volt system or a 120 feeding 2 diff ballast in the sign?
In a three phase panel a double pole single throw breaker is definatly putting out 220v as two separate 110v circuits that are out of phase with each other. So from one leg to the other its 220v and from either leg to ground its 110v. . By definition it is 220v but it could be used as separate 110v… circuits as well. The only way to know how its actually being used would be to open up the sign and see if both circuits are tied into one ballast as 220v or if they split and go to differant ballasts then they are 110v circuits using a common disconnect means. . Being that either way both circuits terminate in the same area they technically both require a double pole single throw breaker. ( Full Answer )
your equipment will not run as hot (motors & drives will stay cool) . the higher the voltage the less the amps . so when running circuits to equipment you will be able to run smaller conductors, smaller pipe. It's cheaper . To install high power equipment it is not always feasible to increase the… current rating of the equipment. . for a 3 phase system power P = 1.732VI. where V stands for voltage and I stands for current. . Increasing voltage instead of current is more feasible for achieving higher power in most of the cases. ( Full Answer )
There are still three phase delta 240 volt systems connected to the grid. Theyconsist of two smaller KVA transformers for two phase coils and a larger KVA transformer to complete the third phase. This larger transformer's secondary is center tapped to supply the split 120 volts to ground (neutral). …To use a 240 volt wye system the voltage to ground would be 240 / 1.73 = 139 volts which is too high for North American standards. They are slowly being phased out by 120/208 systems. This allows for a three phase distribution and 208 / 1.73 = 120 volts to ground. 240V is a common single split-phase voltage, not a 3 phase voltage. Did you mean 208V? 208 is a common 3-phase voltage. I'm not sure what's available in Mexico but you could just buy a transformer. ( Full Answer )
480 volts 3 phase is not a household service in any country and cannot be dealt-with as a DIY project. As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, … on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. Answer You cannot obtain 240 V from a 480-V three-phase supply, if you are describing a three-phase, four-wire, system. If 240 V is a phase voltage, then the corresponding line voltage must be 415 V. If 480 V is a line voltage, then the corresponding phase voltage must be 277 V. ( Full Answer )
It varies. I have seen three phase systems all the way from 240 volts to 345 kilovolts. Typically, they run 480 volt but, again, it depends on the application and the region of the country.
A 3-wire, 240 volt, single phase motor would require two overloads; one for each "hot" current carrying conductor.
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 exam…ple, 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. 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. ( Full Answer )
Wiring a single phase 208 230V compressor to residential 240 using existing 6 3 wire B W R and a ground but compressor only has a two wire and ground requirement?
A 208/230 volt single phase motor only has two wires out. It sounds like you are trying to pick up a feed from a 120/240 source that needed a neutral wire to operate. The black and red wire will give you the voltage you need. Make sure that you use a starter and overload protection for the motor. S…ee discuss question below. ( Full Answer )
230 V is the standard nominal line-to-neutral voltage in Europeanthree-phase systems, which means that the corresponding nominalline voltage is 400 V and it is referred to as 400 V 3-phase.
The (ideal) voltage is 480V line to line. The line to neutral voltage (if it is a grounded system - 4 wires) is 480 / 1.732 = 277 volts. The actual measured voltage may be slightly higher or lower than this.
You don't. These are two different types of electrical systems and the generation of these voltages requires different types of equipment when compared to each other.
you have to get a step up transformer your 3 phase 240 will connect to x1 x2 x3 and neutral will connect to xo some times u dont have to feed xo on the line side because a neutral is created then h1 h2 h3 will be ur load side with 480 volt from phase to phase and 277v from phase to ground also remem…ber when installing a transformer u will need two means of ground 1-building steel 2-cold water pipe and also xo needs to bond to the ground its just a jumper wire from the xo lug to the ground lug ( Full Answer )
The voltage rating of a fuse has to do with how long the fuse is / how much dielectric strength exists between the two terminals that don't melt. If you use a fuse that is rated for too low of a voltage, it will likely melt for a fault condition, but the voltage is too high for the gap distance, so …an arc will develop across the (open) fuse. So...the fuse does no good. It will not protect equipment if used at a higher voltage than it is rated. ( Full Answer )
The color code for 3phase 240 volts is PHASE A- BLACK PHASE B- RED PHASE C- BLUE
240 volt three phase comes from primary distribution main line, usually 13.2 KV three phase, but different for different regions and countries, stepped down with transformers. There are several possible configurations... You can use three 13.2 KV to 240 V transformers wired in wye-wye, providing …240 phase to neutral and 277 phase to phase. You can use three 13.2 KV to 240 V transformers wired in wye-delta, providing 240 phase to phase. This is an older configuration, saving the fourth transformer. Sometimes, one of the phases is centertapped, providing 120/240 split phase, and the neutral is off-center. In this case, the high side is 208 - opposite phase to neutral. In light industrial loads, you can actually use just two transformers to get the three phases, but total power will be imbalanced. More commonly, in large industrial loads, you can use three 13.2 KV to 480 V transformers wired in wye-wye, providing 480 phase to neutral, and you use more transformers to get down to 240. In even bigger industrial loads, you can use three 13.2 KV to 4160 V transformers into a switchgear room, providing secondary and tertiary transformers for whatever you want. ( Full Answer )
Yes, if the motor is rated 240 volts 3 phase. There is such a thing as 240 volt 3 phase power. However if you are asking if you can use 240 volts single phase on a three phase motor, then the answer is no.
If it is a four wire (ie grounded) circuit, and the phase to neutral voltage is indeed 240 volts, then you can.
A three-phase 4-wire system has three live wires and a neutral,which is earthed at at least one point at the transformer. All current-carrying wires are insulated in this system, forsafety. The voltage on the neutral might be zero or only a volt ortwo, but under fault conditions its voltage could b…e much higher. ( Full Answer )
The following formula is used to find amperes when kilowatts are shown. kw x 1000/1.73 x E x pf. The term pf is the power factor value usually using a value of .9. 18000 watts is equal to 18 kWs. 18 x 1000/1.73 x 240 x .9 = 18000/374 = 48 amps.
If the motor is connected to an ungrounded delta supply service there will be no effect on the operation of the motor. If the motor is connected to a wye system supply service and the B phase grounds out, the motor's overload protection would take the motor off line from the electrical supply.
No. The amount and cost of the equipment to reach 480 volts will be higher than any payback you may receive from being off grid. Multiply this cost by three times for a three phase system. This is the reason any off grid operations use electrical generator sets. Even with the price of diesel fuel ad…ded to the operating costs it is cheaper that going solar. ( Full Answer )
480 v is a common three-phase voltage in America but 240 v isusually single phase. You need to check to see if a 240 vthree-phase supply is available.
It should operate with no problems, most ranges are rated for operating on both voltages. Check the label.
A voltage of 277 is the line to neutral (ground) voltage of a 480 volt wye three phase system. L1- N, L2 - N and L3 - N will give you 277 volts. L1 to L2. L2 to L3 and L3 to L1 will give you 480 volts.
rectifiers are used to recrify ac to dc, I'm ot sure that you would use dc for any large voltage, though 3 phase electrics are used in commercial equipment.
The accurate answer depends on the load on the motor (duty cycle) and efficiency of motor. 15HP motor will not actually give you 15HP worth of work 100% of the time. If you assume that for sake of simplicity, then: 1 HP = 0.746 kW Therefore, 15HP = 11.19 kW If you ran it for an hour straight…, it would need 11.19 kWh. So at the very least you will need a generator that can give you about 12kW. Of course there are transmission losses depending on distance between the two units and cable types used. So, 15kW or more may be a better approximation. ( Full Answer )
I have a piece of equipment that the states the voltage required is 208-240 Vac single phase. Is 208 volts from a 120 3 phase system the same as 120-240 volt single phase?
You have it around the wrong way. 120 volts is from a three phase 208 voltage system. 208 divided by the root of 3 (1.73) equals 120 volts. A 208 voltage distribution system is a wye connection that has its center point tied together and grounded. Any three legs of the wye configuration to the groun…ded center point will give you 120 volts. Any two legs of a three phase system are classed as single phase in the electrical trade. L1 - L2 = 208 volts, L2 - L3 = 208 volts and L3 - L1 = 208 volts. The 120/240 distribution is a single phase system. It is the secondary side of a step down transformer that the utility company uses to supply electricity to homes in North America. The output of the transformer is 240 volts that has a splice tap in its center of its winding. L1 - N = 120 volts, N - L2 = 120 volts. L1 to L2 = 240 volts. Now back to the question as long as the equipment states that you can use it on the dual voltages of 208 to 240 volts the equipment will work. ( Full Answer )
The wire size and the circuit breaker for a 125 hp motor must consider the length of lead wire to the motor (essentially the distance of the motor from the supply). 125 hp is a VERY large motor and would be used only in industrial applications. You will need to consult a technician for proper adv…ice, but the general answer to your question follows: The current draw on such a large motor would be approximately 300 amps. That is very large, and would require a wire size of 0000 AWG or 750M. 0000 AWG is 0.46 inches (11.68 mm) in diameter. As you can see, the wire is very large. It is not something you could install yourself. ( Full Answer )
By 'volts per phase', I assume you mean 'phase voltage' as opposed to 'line voltage'? It depends on the country in which you live. In North America, for example, the secondary output of a three-phase distribution transformer typically delta connected , 240 V corresponds to both the phase and …line voltages. In other countries, where a three-phase distribution transformer's secondary is wye connected , 240 V is typically a phase voltage and 415 V is a line voltage. ( Full Answer )
Can you change the wiring of a single phase appliance of 2.4 kw that works on 240 to 400 volts 3 phase 60 hz supply?
No, you can not you change the wiring of a single phase appliance of 2.4 kw that works on 240 to 400 volts 3 phase 60 Hz supply. They are two different electrical systems.
You might be out of luck. Three phase delta 240 volt services are a thing of the past. As far as I know there never was a 240 volt three phase four wire. The line to neutral voltage would be 240/1.73 = 139 volts which is of no use to anyone. . Three phase four wire system for business and commercia…l use these days is 120/208 volts. . A 3/0 copper conductor with an insulation factor of 90 degrees C is rated at 225 amps. ( Full Answer )
What size wire do you need for a 200 Amp 240 Volt 3 phase 4 wire service on a nonresidential building?
A 3/0 copper conductor with an insulation rating of 90 degrees C is rated at 225 amps.
Wire sizing is based on the amperage needed by the load. The equation used to find amperage when the HP is shown is; A = HP x 746/1.73 x V x %eff x pf. Amps = 25 x 746 = 18650/1.73 x 240 x .87 x .87 = 18650/314 = 60 amps. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standar…d motor's power factor between 10 to 100 HP is .86 to .92. Motor feeders have to be rated at 125% of the motors full load amperage. 60 x 125% = 75 amps. A #4 copper conductor with an insulation rating of 75 or 90 degrees C are both rated at 85 amps. The breaker has to be 250% of the motors full load amperage 60 x 250% = 150 amps The breaker will be a three pole 150 amp breaker connected to three #4 copper conductors to operate a 25 HP 240 volt three phase motor. ( Full Answer )
A 10 mm cable is most commonly used for a 500 KVA transformer, 240 volt, 3 phrase. The size of the wire that is used in a transformer is based on the voltage.
Wire size and breaker size is based on the amperage drawn by the motor. Always use the motor's nameplate amperage before using the equation. The equation for amperage when the HP is known is Amps = HP x 746/1.73 x volts x % eff x pf. A standard motor's efficiency between 5 to 100 HP is .84 to .…91. A standard motor's power factor between 10 to 100 HP is .86 to .92. Amps = 100 x 746 = 74600/ 1.73 x 240 x .91 x .92 = 74600/348 = 214 amps. Feeders for motor loads has to be rated at 125% of the motors full load amps. The wire rating will be 214 x 125% = 267 amps. A 250 MCM copper conductor with an insulation factor of 90 degrees C is rated at 290 amps. For conductor protection of the motor feeders, non time delay fuses 600 amp, time delay fuses 350 amps and a breaker has to be rated at 250% of the motors full load amps. The nearest breaker for this amperage will be a 500 amp breaker. As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. ( Full Answer )
A 500 MCM copper conductor will limit the voltage drop to 3% or less when supplying 200 amps for 400 feet on a 240 volt system.
What voltage would be produced if two different 240 volt transformers were wired on two separate primary phases of a 3-phase system and had their their secondaries wired in series?
In U. S. household wiring the two primary phases of 110 to 120volts rms are 180Â° out of phase with each other which is why thevoltage measured from line 1 to line 2 is double that of each linemeasured to the common return. The outputs of two identicaltransformers would therefore be additive if co…nnected in series andin phase and subtractive if out of phase. Please note that if thephase relationship of the inputs is unknown, such as that comingfrom two independent portable generators, for example, the summedoutput voltage will be unpredictable. ( Full Answer )