how will i know if igot the right line of wire in a 3-phase elec motor?
374724
the device is called a phase sequence indicator.  you connect it to the leads of the motor and rotate it and it will tell you the sequencing of the phases
492458
I seriously doubt you have a 50 HP motor!  That is industrial size, and I wouldn't expect a question like that here.\n\nWhat voltage?  A 3-phase 50HP 230V motor is 130 amps!  There is no single-phase motor that big.  If you really have this, get an electrician to install it.
1514
you must use insulated wire or you will effectivly just short out your power source.  most modern electro-magnets use wire that is insulated with a thin coating of a special varnish.  this allows more winding in a given space.  varnish insulated wire is available from nearly any electronics store or catalog or from any business that rewinds electric motors
919217
Like everything else, it depends.  The concern is that at the maximum current you will draw, there is sufficient voltage at the point of use.  Voltage drop depends on the amount of current, and the resistance of the circuit.  \n\nYou can determine the minimum voltage requirements for whatever you are driving.  Knowing the resistance per foot of various sizes of wire, you could determine the size wire needed.\n\nNow it becomes a matter of economics.  Is larger wire less expensive than a transformer--or two if you are going to maintain the original equipment operating voltage.
616079
Take an inch graph paper. Keep different components of your circuit on the paper to get an idea of the space they are going to occupy. Draw connection lines as you would want on your pcb.If you want to see samples of pcb layouts then visit e4u (Electronics for you )site-(www.electronicsforu.com)
998365
In typical DC motors, there are brushes that ride on the shaft of the motor and make connections to the motor coils.  As the motor spins, the brushes are direct the electricity to the proper coil.  Note, the magnets are stationary, and the coils rotate.  It is a simple system, but every time the circuit "breaks" you get a little spark.  They are very electrically noisy, as one might expect when you see little sparks if you watch the motor.\nAn ECM has stationary coils and rotating magnets.  A sensor determines the shaft position and directs current to the appropriate coil.  This is all done electronically.  It is an electrically "quiet" system and since there are no brushes to wear out, it can also be very reliable.
734859
Divide by the voltage and multiply by 1000.\n\nIf you are working with 3 phase power, divide again by sqrt(3)
1058406
At my job, I maintain lager equipment and small equipment for Land O’ Frost. We have motor that we use variable frequency drives on. The VFD’s range from 480VAC 3 phases to 24VAC single phase on the input side to 1000VDC, 480 single phases, 120VAC on the output side. But when installing a VFD the thing that are considered before installing one are the size of the motor 5hp, 35hp, .25hp, how many amps are needed to run the motor and peak amps so the parts are not over current. The voltage is another thing, the amount of programming that you can do so you can set limits for everything. It can take a long time to find what you need. Have fun shopping
620886
(m)\n\ngoto the following website for your question with neat diagrams\n\nhttp://hyperphysics.phy-astr.gsu.edu/HBASE/electric/gaulaw.html
1117712
switch Line 1 and 3. this is the industrial stander. you can also switch any of the two line but you should only do L1 and L3
1065081
high torque compared to single phase. For the same power output the size of three phase motor will be smaller and also it will be less costly.
269821
Depending on the (source + cable) impedance, approx .01 ohms and figuring that this is a 3phase line then:\n\nFault Current is approx 365,000 amps in less than a second.\n\nCheck out the following; Type in Fault Current in search.
317786
http://www.electrospec.com/electronic/components-parts/index350.html\n\ntry here!!
93725
Three phase or two phase?
145405
if the voltage rating of your motor is 460, you can really hook up to a 480 volts electric s=poer source. the maximum your motor can hanmdle is 460 = 10% of 460 whixh is 506 volts
969911
To say it should be earthed is not strictly correct, although it usually is for conventional protection systems especially if that neutral is made available for single phase connections.\n\nThe reason it is earthed is so that any fault that may occur causes a current to flow and operates the protection device and disconnects the supply.\n\nIf you didn't have the earth, everything would work just fine but a fault could cause a hazardous situation.\n\nSometimes the earth connection may be connected through a resistor so that a current would still flow to operate the protection but the maximum current would be limited so not to damage the transformer. This would not be done in low voltage secondaries where the neutral is used for single phase loads.\n\nA system where the neutral might not be earthed is critical systems such as military or nuclear. These systems would have some circuitry to detect a fault and give an alarm rather than trip anything.
178800
To make a motor you need 28 guage copper wire that will have a dark tinted laquer on it. You cannot see it except it is usually darker than copper. In other words you can sand it off when you need to solder it or make a connection. You can buy this wire at radio shack I think.