I know that phases A and C to neutral you get and that phase B to neutral you get I also know that between any two phases you get My question is why don’t you get volts from phase B to either phase A or C? I believe it has to do with the was the sine waves are off from each other but am not totally sure. Does any one have a good explaination? Or maybe a diagram of the sine waves? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it’s the leading place for electricians to meet online. No homeowners asking DIY questions. Just fellow tradesmen who enjoy talking about their business, their trade, and anything else that comes up.
Add a caption Prepare to Connect the 3-Phase Motor In order to connect a 3-phase motor, you will need a screwdriver, a wire stripper, and wire nuts. Hardware store employees and do-it-yourself websites can instruct you which tools you need for your specific motor, wires, and skill level. After obtaining the proper tools, your first step should be to turn off the power supply to the motor.
A single phase input device requires a two pole protection device. For a single phase input device, the input current is typically higher compared to a three phase input device input current.
An expert who has achieved level 3 by getting points Superstar: Hi Casey, I’m an electrician and can help you with this problem. Without the catalog number of the motor you have, or a wiring diagram for it, no one can tell you how to wire this motor with any certainty. Nearly all single speed 3 phase motors have 9 leads numbered 1 thru 9 and can be wired for either “high” or “low” voltage. Further below is the way to wire unless the motor manufacturer or name plate indicates differently.
You will need to determine the voltage of the appliance this is going to be installed into. You should be able to find this on a name plate of the appliance – but it may provide a dual voltage spec here, too. Once you have learned the incoming voltage, you will connect the motor as such when L1, L2 and L3 are the line voltage supply wires and wires 1 thru 9 match the numbers on the nine wires from the motor.
Anyone whose job involves servicing electric motors has encountered the problem of a missing nameplate. Other articles in this series have covered ways of determining the specifications of a motor lacking the nameplate, but what if you are trying to figure out how to wire that motor? For some kinds of motors, principally motors with terminal-based connections, basic wiring is self evident.
The terminal board itself usually has markings that indicate where line one and line two are to be connected. But what if you need to reverse that motor, use a different but available voltage setting, or have a motor that has nothing more than a bunch of color-coded or numbered leads coming out of it?
Mar 14, · On new electrical installations with three phase motor loads, an electrician can hook up all the motors to the panels before having power available, and have them all connected for a clockwise rotation because there are test instruments out there that you can hook up to motor leads, give the shaft a spin in the direction it is supposed to turn.
Hi guys a friend of my husbands gave me an old 5 horse electric motor single phase volts. It has no wiring diagram with it. Two of the black wires have an extra band of tape on them. If I take an meter to one of the banded wires and one of the not banded wires I get a short and the same thing with the other two. So would I take both banded wires to one side of the and the other two not banded wires to the other side of the or do they go in series I don’t want to burn it out before I get to use it Thanks Guys Click to expand Take it to a qualified motor shop or a scrap dealer.
There is no way anyone here is going to tell you any combination of hooking up a bunch of unknown black wires with “an extra band of tape on them” and connect it to mains of any kind. Even if you were able to discern the actual resistance of a winding – it’s not a short, just typically less than one ohm – you have no way of checking their phasing.
Two of them are probably the capacitor connection, but there’s no way to tell. Do not under any circumstances connect that motor to any kind of mains power until it has physically been gone over by a qualified motor technician and deemed safe.
Fernley, Nevada near Reno Posts: One problem here is that the 20 HP motor will be able to produce about 6 HP before it rapidly loses speed. Other than that, it’ll run just fine!
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How do i wire up a 3 hp three pahse motor??? The motor rated at 7. That size of motor needs a starter. This is a type of relay that incorporates an over-current trip. The type of starter I am familiar with generally has a start and stop button incorporated. For an application that includes danger powered log cutting sound dangerous to me it would probably be a good idea to rig up a foot switch as an emergency stop. The supply ought to be via a fused isolator with HRC fuses.
These allow for high starting currents. There are three windings in the motor. Ends of each winding are usually brought out to a terminal block.
Would you like to merge this question into it? MERGE already exists as an alternate of this question. Would you like to make it the primary and merge this question into it? MERGE exists and is an alternate of.
VFDs are very handy if the motor is not huge (huge ones need 3-phase input, commonly) – for relatively small motors, 1 phase in 3 phase out versions are handy, and offer variable speed as well as phase .
The blower motor is positioned on the passenger side of the vehicle beneath the instrument panel, and can be removed from the vehicle without removing the HVAC housing. Before servicing the vehicle, refer to the precautions at the beginning of this section. Remove or disconnect the following: Negative battery cable Passenger side cowl trim panel Carpet to access the front upper screw that secures the air inlet housing Recirculation door actuator Recirculation door actuator wire lead from the routing clip located on the lower air inlet housing and position the wire lead aside Blower motor wire lead connector from the blower motor resistor or power module, depending on application.
Lower Air Inlet Housing One screw from the top that secures the lower air inlet housing to the upper air inlet housing Four screws from the bottom that secure the lower air inlet housing to the upper air inlet housing and remove the lower HVAC housing Blower Motor Wire Lead Grommet Feed the rubber blower motor wire lead grommet through the opening in the lower air inlet housing. Push the blower motor wire lead through the opening in the lower air inlet housing and remove the lower air inlet housing from the vehicle.
Place the recirculation-air door as needed to access and remove the three screws that secure the blower motor to the lower half of the HVAC housing. Lightly bend the recirculation air door far enough down to remove the blower motor and wheel from the HVAC housing. Make a note of the location of the blower motor mounting tabs. Install or connect the following: Blower motor and wheel to the lower half of the HVAC housing and line up the blower motor mounting tabs to the correct location on the HVAC housing Blower motor and wheel into the HVAC housing by lightly bending the recirculation-air door far enough down Three screws that secure the blower motor to the HVAC housing by positioning the recirculation-air door as needed Torque to: The rear blower motor and blower wheels are repaired only as a balanced unit.
The entire blower motor and wheel assembly must be replaced if either component is fault or damaged.
Induction motors by Chris Woodford. Do you know how electric motors work? The answer is probably yes and no! Although many of us have learned how a basic motor works, from simple science books and web pages such as this, many of the motors we use everyday—in everything from factory machines to electric trains—don’t actually work that way at all.
Mar 06, · Hubby says it’s not 3 phase, it’s single phase. The 3-wire cord is good if minimum AWG Two wires being hot (v each), 1 wire being a ground grounded to a bolt inside the cathead.
If this machine spent its previous life in an industrial setting, odds are pretty good that it runs from 3-phase power But you only have single phase residential power in your shop What should you do? There are a number of commercial solutions available, you could buy a solid state motor speed controller expensive , or buy one of those static converters you see in catalogs expensive, but less so , or buy a rotary converter very expensive.
Since by design, motor speed controllers have no interest in the frequency of the original power source, they first convert the 3-phase AC into very smooth DC, using a 3-phase full wave rectifier. The converter’s added benefit of motor speed control, is a feature you should not use, unless your motor has a separately powered cooling fan. It can be fatal for many older motors that cannot handle the high temperatures that result when the motor is run significantly below or above its name plate speed You have been warned!
Static 3 phase converters take advantage of a feature of all 3-phase motors, that is the ability to self generate a missing phase leg. If you start a 3-phase motor, and then remove one phase of the power source, the motor will continue to run. Because the motor is now running with only 2-legs of the 3 phase power, there is going to be a reduction of its name plate power.