Electrical Engineering

Disadvantages of DC:

* High power transformation of voltage is less convenient than AC. AC uses a transformer.

* DC does not have the natural break in transmission that AC has (zero twice per cycle) and does not switch off as easily

* DC does not provide time to synchronous clocks * DC dynamos or generators are less efficient at converting input power to output electricity than AC alternators. That is why altenators with rectifiers are now used in vehicles instead of DC dynamos.

Some motors have dual voltage ratings because it is typically better to use the higher voltage if available because the current will be lower. However, the higher voltage may not be available everywhere so the unit is designed to work on the most available voltages if the higher voltage is not available. Since the motor in your question is more for a commercial use than at home, the range of available voltages may be limited at certain sites.

A Sag Template is a very important tool with the help of which the position of towers on the Profile is decided so that they conform to the limitations of vertical and wind loads on any particular tower, and minimum clearances, required to be maintained between the line conductor to ground, telephone lines, buildings, streets, navigable canals,power lines, or any other object coming under or near the line.

To answer this question the voltage of the cooker is needed.

The electrical code book states that a single phase 3 HP motor at 230 volts draws 17 amps. This equates to 3910 watts. Allowing for starting inrush current a 5000 watt generator will run the motor but the generator will labor a bit until the motor gets up to speed. Generators with a higher wattage rating would have less trouble with the starting of the 3 horse power motor.

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One hp is 746 watts. 3*746=2238. It takes 3 to 6 times as much energy to start as it does to run.

When power factor is at unity, the voltage and current waves are aligned or in phase with one another. Since power is the product of voltage and current, power transfer is maximized at unity power factor. When power is transmitted at a lower power factor, greater current is required to deliver the same amount of power. When current is increased, the size of the transmission, distribution and generation systems, all have to be increased accordingly, along with the price of the killowatt-hour at the meter.

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easy, mount two in frame, place layshaft in middle with bearings, and collars to secure.

Imagine a shaft that runs at the side of one, with gear on end, then rotate image in your head, and place another motor in , and wire up in opposite rotational direction.

rc model guys do it on small scale, google it.

steve

This should work if the form factor fits your application and other ratings are not exceeded. You want the same capacitance and make sure there are not any embedded components like a bleed-off resistor in the replacement that aren't in the original.

The scientific name for the receptors of heat is THERMORECEPTOR which is one of catogories of Touch receptor. THERMORECEPTORS are sensitive to change in temperature.

To drop a 12 volt source to 6 volts with a resistor, you have to drop 6 volts. The value of the resistor you need would be 6 divided by the current the device pulls in amps.

For example, if the device pulls a half an amp the resistor has to be 6/0.5 or 12 ohms. As this device runs on 6 volts and draws 1/2 amp, it's wattage is 3 watts (volts x Amps). Common practice is to double this, or the resistor will probably get too hot and may open. I'd use a 10 watt to resistor to maintain a good margin for safety, and they're readily available.

Use a 12 ohm, 10 watt resistor.

electric produce less pollution, while up until now aren't as fast as petrol motors

Transmission loss reduce by using

1) higher diameter conductor (R = q l / a) or specially maded low loss conductors

2) using energy efficient equipment such as low loss transformer

3) twisted conductors instead of solid

4) proper monitoring and control of transmission eqipment

5) use of high temperature super conductors

....etc

V = I x R so 120/96.8 = 1.24 Amps.

There are a few reasons. In my opinion the most common is cost. In an industrial setting, three phase power is used to power motor loads. A three phase induction motor is more efficient than a single/split phase motor. They also have higher starting torque. A three phase load will also typically have a lower amp rating for the same size load as single phase. This saves money because you can use smaller wire.

Magnetic freild

Disadvantages of parallel wiring for circuits include that they need more wiring and there are many paths running next to each other. When you add more things to the wiring, the current draws on the same source and goes up.

in many ways..by adding coil,increasing frequency ,made coil smaller,inserting rods inside the coil,physical position adjustings..and so on.the fact is many factors are involving in inductions.

On an average, the following assumptions will stand good for an induction motor: * Starting current (Ist) will be 5 times of the Full Load Amps (IFLA) * No Load Amps (INLA) can be any where between 0.3 to 0.5 times of IFLA; To the most, this figure depends upon the frame size of the motor; larger the frame size, smaller will be the INLA. This is also true for the wound rotor type induction motors. Manufacturers normally give two different current figures, one for the motor running with full load, and one for 'locked rotor'. Locked rotor current is the very high current drawn when power has been applied, but the motor has not had time to start spinning. <><><> No load current is important since this portion of the energy consumed will not be reflected in the process output, for a machine which is running continuously, no one can neglect whatever low value it is. Usually, the efficiencies will be mentioned and one can apply basic thumb rules to arrive no load current from those figures <><><> Manufacturers don't usually publish 'current at no load' for their motors. Since a motor with no load is not doing anything useful, no one really cares how much current is being drawn. It's kind of like putting your car up on a jack so the wheels are off the ground and asking how much fuel will the car burn sitting still with the wheels turning at 10 miles an hour - or at 100 miles per hour - who cares? !!!

When a phase line touches the neutral by any conducting material means the Short Circuit. If there is a short circuit then the current in that circuit will be much higher and this increase in current may damage the the devices that are connected to that line.

5 V +/- 0.25V (i.e. between 4.75 and 5.25 V)

During which phase of DMAIC will you identify the root cause of the problem?

if you are using the pressure switch to control a 3phase pump chances are it already has a magnetic starter and a single pole control circuit

i have seen small 3phase air compressors with the contacts driven right off the diaphragm

bigger ones usually have 110 volt controls

i would be concerned about the current rating of the switch if you are trying to switch the motor directly there are many single phase compressors that run directly from the pressure switch