How can a 240V single-phase split ac work in the US which has a 120V 2-phase system?
Why does a 120V-240V dual voltage single phase table saw motor produce 4 times more torque at 240V than at 120V?
Answer .
I believe it has to do with the windings in the motor. When wired to 120V, half the motor has a positive polarity and the other half has a negative polarity. Then …as the current alternates (60 hertz AC) the polarity flips, the magnetic poles oppose each other and cause the motor to spin..
I think in a 240v winding the motor is in quadrants instead of halves. So it would be like have 4 magnets opposing each other instead of two and you have double the voltage..
Answer .
The calculation for electrical power (which is converted to torque) is voltage-squared divided by the resistance. If the voltage is doubled, the power is increase by 2-squared, or quadrupled. In reality, the torque produced will be slightly less than 4 times more (because some of the power is lost as heat), but it should be pretty close..
--.
The second answer is the best answer. The first answer could suggest several things, depending on how you read it. Nonetheless, they are all incorrect. The power calculation (in Watts) is really all you need to do. Voltage squared, divided by resistance. Resistance stays the same, so power quadruples when voltage doubles. If the motor spins at the same speed, then torque should effectively be linear with power, aside from the extra heat created in the components from the higher current.
In the event of a city power cut can you use a single-phase 240V generator to connect across the two 120V phases supplying the house and would you still get 120V to neutral on each side?
Answer Yes you can BUT because you asked this question you should have a pro show you how to do it. Just to give you a worst case example, transformers work in both directio…ns so if you feed the "city" with 220v your neighbors will enjoy your power until your generator burns up. Maybe 2-3 seconds! Another thought Yes, IF you have a neutral connection at your generator. If you do not connect the neutral you will not have 110v from hot to neutral. This is because your house must be perfectly balanced across the neutral to have the correct voltage divider to split 220V into 110V. This is near impossible in a residential situation. You need the neutral for 110V. Also, buy a generator transfer panel if you plan to power your house off a generator. It's the law. More Not because it's the law, but if you don't have a transfer panel and you connect it directly to your panel you'll also be putting current to the lines coming into your house. This is real scary for the electricians that come out to repair the power. The (city) power is off and they don't expect to see (feel!) any on your end. You could end up electrocuting someone.
How can you convert a 120V box to 240V for AC?
Answer .
It can't be "converted", you have to run a 220 line and have a 220 breaker and plug installed.
If you work in an industrial setting how do you make a 120V single phase line into a 240V single phase line?
Get an electrician .
\nIf you work in an industrial setting and DON'T know how to do this, you should keep your hands off it. \nYou are not a suitably qualified individual.… \n .
\n National Electrical Code definition, NFPA 70 2005 Article 100 I: Qualified Person. "One who has skills and knowledge related to the construction and operation of the electrical equipment and installations and has received safety training on the hazards involved." \n .
\n Performing any such operation without suitable qualification subjects your employer to action by OSHA. \nRead that as: "financial penalty"
Will a 120V hardwire lighting fixture purchased in the US work safely in Germany 240V?
Answer .
No. It is not rated or designed for the higher voltage. Chances are it will catch fire.
Can you use 120V appliances on a 240V outlet?
Not advised .
Some appliances may work, but I imagine most would either blow a fuse or just burn out. Definately not advised unless you use a transformer. With the right …transformer everything should work fine.
Will an HDTV made for 120V 60hz work in 240V 50hz if you use a voltage converter?
Answer Yes - but picture quality will be affected. Try also buyinga frequency convertor - maybe there is one on the market that doesboth. Check the TV Most modern TVs use a sw…itching power supply asit is lighter and cheaper than a transformer. Switchers don't careabout frequency (at all) as they immediatly rectify it to DC.Chances are it will run fine. Also, check the spec plate on theback of the TV. It may already handle 240V as it is cheaper tomanufacture one power supply that works worldwide than differentTVs for different countries. (Though the tuner in a TV may negatethis argument.) Answer Probably not, but this has nothing to do with the voltage.Televisions designed to operate at 240 V 50 Hz are likely designedfor European television systems which (except in France) use thePAL standard, whereas those designed to operate at 120 V 60 Hz arelikely designed for North American television systems which use theNTSC standard. Unless the television is multiple standard, theyneed to be used on the system for which they are designed,
How can you convert US 120V or 240V circuit into a single-phase 240V circuit to use on a European appliance?
The voltage isn't a problem, you can run 220 from your house and use that to run a European appliance, the problem is whether the appliance is dependant on line HZ. European i…s 50HZ and US is 60HZ. If the appliance specifies 220/50HZ, it will probably give you trouble here. If it says 220V/50 or 60HZ
Can you split a 240V wire to wire a 120V outlet?
Answer .
Yes you can, BUT IT IS DANGEROUS!!! You can use one side of the breaker to wire an outlet but if the outlet or the appliance you plug into the outlet shorts out, t…he breaker may not trip. Only half of the breaker will try to trip and the other half will not know to do the same therefore you could over heat the circuits and cause a fire. NOT A GOOD IDEA..
That is a stupid answer, you cannot wire one side of a breaker. IT WILL NOT TRIP !!!! SO IT COULD CAUSE SOMEONE TO BE ELECTROCUTED.
Can you use a 120v switch for a 240v application?
Answer for USA, Canada and countries using similar 60Hz household electricity supplies .
This is not possible because a 120v switch disconnects one conductor while a 240v a…pplication requires that both hot conductors be disconnected simultaneously..
The proper solution is to use a double pole 240v switch of the correct size. It must have contacts which are rated to carry the appliance's starting and running currents (amps). A switch with under-sized contacts would be likely to get very warm - or even overheat - to such an extent that it might become a dangerous fire hazard..
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. 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 a meter or voltage indicator to insure the circuit is, in fact, de-energized. .
How do you use 120V equipment on 240V?
The short answer is: you can't..
The long answer is: just like using a flashlight bulb that has a voltage that is half the voltage of the battery, it will not work. It will t…ake too much current, causing it to burn out and be useless.
Can you use a 240V disconnect switch for a 120V AC?
Yes and you will have a spare terminal for future use
Answered
In DVD Players
Will a DVD made for 120V 60Hz work in 240V 50Hz if you use a voltage converter?
Maybe....
most modern equipment will operate on 90V - 260V so it's worth checking before buying a voltage converter for it..
If the DVD player is 120V, that suggests that it… is North American and will play NTSC standard discs. Using it on a 240V region means it is likely that it will be in a PAL zone. THerefore, discs bought locally may not work because of regional codings, because of the difference between PAL and NTSC and because the display may not be able to handle NTSC..
Some DVD players will play any standard (NTSC or PAL) and some displays will also handle either standard. A handful of players do not have region codes either. It is worth a little more research before you assume that the DVD player will perform as you hope.
Answered
How can you convert 240v to 120v for ac?
Use a step down transformer 240 primary to 120 secondary. You must know what the connected load (amps) is so that you don't overload the transformer. Small transformers are ra…ted in VA.
Answered
Can 120v bulb work in a 240v socket?
Answer for USA, Canada and countries running a 60 Hz power supply service. .
Assuming this inquiry is a request for information rather than related to any practical applic…ation, here is the answer:.
It won't work for long. If it was a low-power bulb it would probably just go "pop" and be useless but if it was a high-power bulb it might even explode with a loud "bang", sending broken glass shards in all directions! .
So don't try to do it as an experiment because the result could be very dangerous. .
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.
Answered
How do you get a split phase 120v 240v power supply from a single phase 240v supply for an American RV with a 50 amp service?
This is a common misconception. A standard 240 utility feed, common in the US, and a 120/240 feed are one in the same, the exact same thing. It is called (historically) an Edi…son connection. .
If you have a 240 volt single-phase supply, with two hot conductors, a neutral, and a ground wire, then you already have 120/240 service. .
If you do not understand the terms above, then hire a qualified electrician to make the connection for you. .
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. .
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 a meter or voltage indicator to insure the circuit is, in fact, de-energized.
Answered
Can you split a 240v circuit into two 120v circuits?
yes, a 240 v circuit normally has 2 120 volt legs which are opposite phases and a neutral wire, there will be 120 volts between either hot wire and the neutral and 240 volts b…etween the two hot wires.