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What type of switch would you use for a 120 volt motor drawing 10 amperes?
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Why would wire harness to blower motor resistor melt down?
The blower motor is going bad and drawing too much current.The blower motor is going bad and drawing too much current.
What would cause your 93 F250 wipers to stay on you replace the switch and motor. I have changed the switch motor and relay. The intermittant delay does not work. Where is the governor?
It has to be the switch. It is what controls the power to the wiper motor. If the switch is fried again I would check that the relay (or that the fuse is the right amperage) has been fried in the open position somehow. This would allow unchecked voltage to fry its way through your switch to power the motor. I hope this helps you some.
Is it possible to control the speed of a motor with just batteries a throttle and an on off switch?
You would have to use a dimmer switch I would think.
Why would the driver's side window on a 1997 Chevy S-10 Blazer not work?
Bad switch? - jump wires on switch to see if motor works Bad motor? See if you are getting power to the motor - if so bad motor Try slamming door with switch depressed - sometimes it works!
How do you change the driver side window motor on a 99 Chevy venture?
I would try the window switch first , but if you are going to replace the switch then you will see how to replace the motor. You would have to take the door panel apart after that its easy.
What would cause a blower motor to quit working?
Blown fuse? Bad relay? Bad switch? Burned out motor?
Why does my blower only operate on 3 and 4?
My first guess would be the blower motor resister. My second guess would be the switch and or plug into the back of the switch.
To reverse the rotation of a three phase motor you would?
Switch two of the three wires.
How many amp does a 40 hp motor draw at 440 volts?
At 440 volts, a 40 hp motor pulls about 68 amperes. Well, sort of...The definition of a horsepower for an electric motor is 746 watts. Multiply 746 by 40, and divide by 440, and you do get 68 amperes.1hp=746Whence, 40hp=29840Wgiven that the motor draws 440voltsbut current = power/voltage.therefore, current=29840/440 = 67.81818182 amps.The complexity, however, is that a motor is an inductive load and it has reactance. This reactance will change the phase angle between voltage and current, causing current to lag voltage by some amount. Power factor is a measure of the ratio of apparent power to true power, and is essentially the cosine of the phase angle between voltage and current. This power factor will make the true power be higher than the apparent power, but horsepower is based on apparent power.Bottom line is that the amperes in this case will be dependent on the power factor, perhaps about 75 amperes, maybe.Also, such a motor is bound to be a three phase motor. The amperes will be spread out among the three phases so, for 68 amperes, it would be about 23 amperes per phase, and for 75 amperes, it would be about 25 amperes per phase.In terms of power factor, it might be closer to unity than anticipated, if the motor has power factor correction capacitors installed.Keep in mind that starting current will be much higher than running current. Also note that large motors of this type would typically be started in wye configuration, so as to present lower voltage across the windings, and then run in delta configuration, for full power operation.I'm going to stick with about 25 amperes per phase, full power run mode, unless someone else has something to add, of course.CommentAn added complication is that '40 hp' refers to the output power of the motor. Unless you know the efficiency, you cannot work out the input power. Incidentally, 68 A single phase doesn't work out at 25 A per line for a 3-phase motor!!!!! It works out a little over 39 Aper line, because P = (root 3) x U x I x power factor!
Hyundai wipers not working replaced motor still not working any ideas where to check next?
i would check if you have power to the motor from the switch
I have an intermittent problem with a 2006 Volkswagen Jetta drivers door power window motor. It will just stop working.Is it going to be the motor or the switch.?
I would suspect the switch first. The next time it fails remove the door panel, unplugg the electrical connection at the window motor and probe the plug with a test lamp to see if the motor is receiving power when you work the switch.
What is the formula for calculating the full load current of 300 HP motor?
One horsepower electric is defined as 746 watts, so 300 horsepower is 224 KW. You don't say what the power factor is, so lets assume 0.85. Divide 224 KW by 0.85, and you get 263 KVA. You are running three phase, no doubt, so divide by 3 to get 88 KVA per winding. Lets assume 480 three phase delta, so divide by 480 to get 183 amperes per winding. Finally, look at motor efficiency. Lets assume 0.95, giving 192 amperes per winding. To translate between winding current and phase current in balanced three phase delta, multiply by the square root of 3, giving a phase current of 333 amperes per phase. That's a lot of current, requiring very large windings and conductors, and it would be a very large motor. I would use a motor with a higher voltage, perhaps 4160. This would bring the current down to around 22 amperes per winding, or 38 amperes per phase, a more reasonable value for such a large motor.
