Electrical Engineering

Batteries are essential components in a substation. They provide the (tripping) current by which protective relays can trip high-voltage circuit breakers in the event of a fault. This means that the circuit breakers can trip even if the substation itself has lost its ancillary AC power supply.

The way heat is transferred from the sun to Earth is because heat from the Sun is transferred to the Earth by a process known as Radiation. Most objects in the universe continuously radiate light off of their exposed surfaces due to their temperature. The hotter an object is, the more energy this discharge light will contain.

Look at the 'bit', the part that gets hot that you do the soldering with. It should have an inclined flat surface on the end. If it has not, make one by using a file.

Heat the soldering iron up. At the same time get the solder out, which should be tin solder with internal flux. When the iron is hot, quickly file the surface of the bit clean and apply the solder, which should immediately 'take' to the surface.

That's it.

A simple AC generator consists of:Figure 3 Simple AC Generator(a) a strong magnetic field, (b)conductors that rotate through thatmagnetic field, and (c) a means bywhich a continuous connection isprovided to the conductors as theyare rotating . The strongmagnetic field is produced by acurrent flow through the field coilof the rotor. The field coil in therotor receives excitation throughthe use of slip rings and brushes.Two brushes are spring-held incontact with the slip rings toprovide the continuous connectionbetween the field coil and theexternal excitation circuit. The armature is contained within the windings of the stator and isconnected to the output. Each time the rotor makes one complete revolution, one complete cycleof AC is developed. A generator has many turns of wire wound into the slots of the rotor.

The magnitude of AC voltage generated by an AC generator is dependent on the field strengthand speed of the rotor. Most generators are operated at a constant speed; therefore, the generatedvoltage depends on field excitation, or strength.

Watts = Voltage X Amperes X Power Factor Power Factor = Cosine of the Angle between Voltage and Current For purely resistive circuits, Power in Watts = Voltage X Amperes Watts divided by 1000 = kiloWatts

No idea what a direct online motor is but it certainly sounds like a peice of electrical engineering - especially if there is a wiring diagram of it.

Check with your electric company. If you switch to 100 W fluorescent bulbs they are only about 14 watts usage. Those are the new energy efficient bulbs. You still get 100 W, but less wattage used. Therefore you bill should be reduced by some. You won't see it right away, it's over the long haul. I have switched most of my lighting (except one lamp and my kitchen) to those bulbs. They last a long long time. I will be switching my kitchen to a new fixture so I will use the 100W energy efficient bulb and get just as much light as 100 incandescent bulb. I'll put 4 in and get 400 W for 56 watts charged. < > < > 5.76/30 days = .192 cents per 24 hour period. .192 x 7 days = 1.344 dollars a week

pole=2

slots=24

phase=3

slot/pole/phase =6 (1)

first you need to measure the surface area of your rad. then got to your local parts place and tell them you need an aftermartet electric fan kit (with your predetermined fan size and the kit will have detailed instructions for installation

Converts mechanical energy into electricity. Movement of magnetic field across a conductor will cause electron flow.

The windings of a generator are rotated within a magnetic field.

brown, red, yellow , in case of gold its 5% tolerence, silver 10% tolerence, no color 20% tolence..

AAA batteries are rated at 1.5V as are AA-C-D batteries. Once down to 1.3V or lower they are not much use,

First it is beyond me as to why you would be painting a capacitor. You also don't give any ratings for the capacitor. By painting over the ratings on the capacitor you will make it difficult for future repairs. Also you don't mention environmental conditions of the type of paint. I have had any number of capacitors fail in different ways and some in spectacular fashion with heat and bubbling surfaces involved which could be a fire hazard. My recommendation would be against painting.

Kindle help me to answer

What is valve point loading effect and its applcation

WikiAnswers does not support pictures, so here are the instructions for drawing the diagram yourself.

Draw a circle, centered at the origin. Think in polar coordinates, where radius is power and angle is the phase angle between voltage and current. The convention is that a purely resistive load, with a power factor of 1, has a vector going straight up the Y axis. (As opposed to normal trigonometry, where 0 theta is along the X axis.)

Now, rethink in rectangular coordinates. The length of the vector to the circumference of the circle, is volt-amps, VA or KVA or MVA as appropriate. The Y coordinate is watts, W or KW or MW as appropriate. You can see that, in the resistive case, where the phase angle is zero, that VA and W are equal. We call that power factor = 1.

Now, lets introduce some reactance. Lets say the system has an inductive load with a phase angle (lagging) of 45 degrees. Redraw the vector upwards with a 45 degree angle. Typically, you go clockwise for a capacitive load and counterclockwise for an inductive load. It does not matter which orientation you use, so long as you are consistent in your meanings.

Notice that the Y coordinate is now 0.707 (square root of 2) and the X coordinate is -0.707. Now, VA is still one, because the length of the vector is still one, but Y is 0.707, so watts is 0.707. We call that a power factor of 0.707, because power factor is true versus apparent, i.e. Y/R. If you look at X, you see that it is -0.707. We call X volt-amps-reactive or VAR or KVAR or MVAR as appropriate. Don't worry about the sign; VAR is 0.707, and the negative sign means that it is inductive, as opposed to capacitive.

In the theoretical case of an ideal inductor or capacitor, with zero impedance for the conductors and the source voltage, the vector would be aligned with the X axis, pointing left for inductive and right for capacitive. This means the power factor is zero. Note that VA is still 1. That means that energy is being transferred, with a cost, but the electric meter is standing still because it reads watts, not volt-amps, nor volt-amps-reactive.

You may wonder about the case where the vector points down. That is simply the case of a generator, instead of a load.

There are losses associated with both, but I don't think that's what you're getting at. The power applied to the field winding, typically on the rotor of a generator, is used to turn the field winding into an electromagnet; This electromagnet is forced to spin, which induces a current in the armature windings. This induced current is the power output from the generator. So a little power is lost/used in the field winding to convert the kinetic energy from the turbine into electric energy.

SF6 circuit breaker

Yes, the resistance of the filament of a light bulb is what generates enough heat to make the filament glow and produce light.

The advantages of a moving iron ammeter is that it can accurate measure the amount of electricity which is flowing. This makes it well suited for both monitoring and controlling the amount of electricity in a circuit.

rms value of voltage

40 watts. I did an experiment on this. Go do one and see for yourself. Sheesh. -_-

You would overload and damage the device and/or the adapter.

An AC water heater can be converted to operate on DC current but the cost will be large. In the electrical trade anything can be done if enough money is spent to get the results that are requested.

Loads or power consuming devices are usually wired?