Electrical Engineering

it will improve the power factor... The angle between voltage and current will decrease depends on capacitor value.

to achieve high voltage Wave type winding is used...... For high current Lap winding is used.

There are 3 most commonly used methods of starting single-phase AC induction motors: Shaded Pole: This method is commonly used on small AC induction motors, like might be found in an ice cream freezer or electric fan. It involves a physical object acting as a small coil which causes a separate starting magnetic field out of phase with the main field generated by the primary induction coil. This causes a torque to develop across the rotor shaft upon application of AC current which starts the motor turning. Once turning, the rotor rotates concurrent to the main coil's field and no longer needs the starting force, which actually lowers motor efficiency and slows rotation when the rotor gets up to speed. For this reason, the starting force is kept low to avoid excessive motor heating through loss of efficiency. Capacitor Start: This method is commonly used on larger AC induction motors, like might be found in an air-conditioner blower motor or compressor. In a Capacitor Start motor, a second coil offset somewhat from the main coil, is connected in series with a capacitor to cause a phase shift. This provides a starting torque for the rotor stronger than the shaded-pole motor and also more efficiently, but still interferes with overall motor efficiency and causes extra heating once the rotor is up to speed. "Split-phase" or Switch Phase: This method is commonly used on motors that require a great deal of starting torque, like many washing machines and some dryers. So-called "Split-phase" motors use a more powerful offset coil and capacitor combination that is turned on and off by a centrifugal switch controlled by the rotor speed. When the motor is stopped or turning slowly, the centrifugal switch engages the start winding and provides maximum torque for starting the motor. When the rotor speed increases, the start winding is disengaged by the centrifugal switch, and this leaves the motor spinning on the main coil only. This increases motor efficiency by leaving the start winding off during the motor run time and reduces motor heating.

The CEC states; 100% of the sum of the first five receptacles having the highest ampere ratings and then 75% of the sum of the ampere ratings of the next ten receptacles having the same or next smaller ratings.

Houses generally run on single phase power. It would not make sense to convert single phase to three phase to run a house. Please restate the question.

If, by 'core', you mean its magnetic circuit, the answer is yes you do! Without a magnetic circuit, you will not be able to concentrate the magnetic flux within the air gaps enough to produce sufficient torque on the rotor windings.

It is not necessary to design an 11 kv underground cable. There are several 11 kv underground cables already on the market. You can choose exactly which cable will fit best for your project and purchase it.

The terminology down stream refers to an electrical circuit and where devices are connected into the circuit.

In reference to the breaker that feeds the circuit everything is down stream from it.

If a GFCI receptacle is added into the circuit as the first device, the GFCI can be wired to allow all of the regular receptacles to be protected down stream from that GFCI.

Every device added to the circuit will be down stream from the one that is ahead of it. The only device that will not have something down stream from it will be the last device in the circuit.

Because the power of a resistive component is directly proportional to the square of the voltage across that component.

Both radial and axial forces.

it will be hot and rainy

an inverse time protective device is a protective relay with definite minimum operating current and definite minimum operating time for a given current. the device will ensure that increasing current in a fault, that the operating time will be decreased. Preventing an overload.

A device with a low resistive load will produce a high current in a series circuit.

The process of obtaining 220 volts from 380 volts is quite simple. 380 volts is a three phase four wire system voltage. The 220 volts is obtained by taking the sq. root of 3 which equals 1.73 and dividing it into the phase voltage. 380/1.73 = 220 volts. This holds true with any three phase four wire voltage system. 208/1.73 = 120 volts, 415/1.73 = 230 volts, 480/1.73 = 277 volts and 600/1.73 = 347 volts. This lower voltage is present on any of the three phase legs of the three phase system to the neutral which is grounded on a wye connection.

Both are types of isolators of a power circuit. Load break switch is an isolator where circuit can be isolated on load. The quenching media could be air, oil or gas.....

Air break switch is type isolator where isolation takes place in the air itself. (break contacts are not immersed in oil, gas ...) But whether these isolators can be opened on load or not can be said only by looking at the desgin data. Some isolators are designed to open and close on load.

A watt is simply the SI unit of measurement for power. So, the power of a mechanical load applied, say, to an electric motor is typically measured in kilowatts. In North America, a mechanical load is still generally measured in horsepower, which is the Imperial unit of measurement for power. The watt and the horsepower are simply two different units for measuring precisely the same thing!

Yes. That is what microphones do.

kn

220V 60 Hz will be found between phases of a 3 phase 117V system (like the one used in North America).
220V 50 Hz will be found between phase and ground (neutral) in many Europe and countries (though now it has been standardized to 240V 50 Hz).
The frequency of the alternating current is a significant difference in many applications but some equipment is not frequency sensitive (tungsten filament light bulbs for example).

A grid DC tie is where AC is converted into DC, which is then converted to AC again on the other side. If you have a DC to AC transformer setup, you'd need to add a second one going the "other" way for a full DC tie station.

ADVENSER means Advanced Engineering Services

To improve the power factor

When you need to calculate the estimated load or load current during initial design phase or so, you need to assume a value for power factor which is realistic. 0.95 is a realistic value.