Electrical Engineering

Transformer works on the principle of Electromagnetic induction.

The formula you are looking for is I = kW x 1000/ 1.73 x E x pf. The formula uses .9 as a power factor. A #1/0 copper conductor will limit the voltage drop to 3% or less when supplying 116 amps for 59 feet on a 415 volt system.

Magnetizing inrush current has bigger 2nd harmonics compare to short circuit current.

the second harmonics content is about >60% of fundamental harmonic.

magnetizing inrush current happened when we energised the transformer, and short circuit current happened if there is a short circuit between different alive phase.

Because 2 terminal comes out from the battery and through red wire we ground the +ive terminal so that possibility of noise interference will get zero....noise occur only in the +ive terminal.....thats why we use -ive voltage.

Normally current transformers are used for two things . For measuring and protection. Whenever the CT is a protection CT it will be connected with the protection relays and there will be setting in the relays based on our requirement.

when the current pass through the relays are more than the setting range then relay will send the tripping signal to the breaker available in the system to isolate the fault section. Finally the CT is not protecting the system. it will transfer the high primary current from the system to relay as small secondary current.

If you have a simple circuit. For eg: One voltage source and one resistor, then the voltage of the circuit will always remain the same, the current however will decrease following Ohms' Law V=I*R.

If we have a current source instead of a voltage source, we are forcing the current to be a certain value so if we increase the resistor value the current will remain the same but the voltage will increase.

no but you cant exceed the wattage of the generator if you are close to that amount you will notice a reduction not nescessarily in voltage but amperage which will have the same affect If the generator is 7500 watts, 240 volts, that is approximately 30 amps maximum load. According to one online calculator for voltage drop, your AWG 8 wire run would have only a 3 percent drop over 95 feet or so, or 120 feet if you're only using 25 amps. Ref: www.elec-toolbox.com/calculators/voltdrop.htm

boundary conditions for perfect dielectric materials

Parallel circuits.

Basic materials to build a transformer are magnet wire, iron core and insulation material to separate the two windings.

that is the point of being universal

I believe a kilowatt and a kilovolt-amp are mathematically equivalent units, but they are used in different contexts.

Watts are used when talking about average or instantaneous power or "true" power. Volt-amps are used when talking about Apparent power.

if an emf is induced in a coil due to the current flowing through itself is called SELF INDUCTANCE.

on the other hand if an emf is induced on another coil due to the current flowing through the previous coil then it is called MUTUAL INDUCTANCE.

suppose there are two coils A and B

a current is flowing through A.

now if the flux produced due to this current induce an emf on the same coil A, then it is SELF INDUCTANCE, and if it produce emf on B, then it is MUTUAL INDUCTANCE due to coil A.

Leading power factor has no advantage as the apparent power will be greater than true or active power...

So power factor should be as close to unity as possible...

Lagging p.f. causes high currents in line, whereas leading p.f. causes over-voltages.

solar winds

A circuit breaker or a fuse.

To convert AC to DC, first the AC goes into a rectifier circuit, which can be as simple as a diode (which allows current to flow in one direction), or a network of diodes. The out put of this will be an oscillating from 0 to some positive voltage. Then a capacitor/resistor network which smooths out the ripple current.

But before all of this happens, usually the AC goes into a step-down transformer, which will get the voltage input to the rectifier circuit in the range of the desired output DC voltage.

Total current entering a node is always zero.

You need a Battery, Light Bulb, Ammeter, Switch.

We can make sound louder by successive reflection between divergent planes (conical). For example, roll paper into a megaphone or cone shape. Or, cup your hands around your mouth.

Additionally, some structures create louder echos. For example, sometimes buildings within a city "bounce" vocalizations, similar to the echo produced in a mountain range or The Grand Canyon.

11,000 watts equates to 14.745 electric horsepower.

If the number of turns in the primary side of the transformer is 200 and the number of turns in the secondary coil is 100, the turns ratio is 200 to 100, or 2 to 1. This application would be a step-down transformer, reducing voltage by one half and doubling current.

If the voltage is AC a transformer could be used. If the voltage is DC calculations could be made to apply the proper size resistor to the circuit so that it has a 3.7 volt voltage drop across it.

slip power is a power which is develop by the induced voltage and current in an induction motor