Electrical Engineering

if the designed value of percentage impedance is change, for general this should affect tow things

* if the percentage impedance is decrease this should increase the fualt level current

*if the percentage impedance is increase this should increase the transformer losses and tempreture rise

so the designed value of percentage impedance is determined according IEC if it is less than or equal 10% the margin should be + or_ 15%, if it is more than 10% the margin should be + or _ 15%

so the percentage impedance of this transformer is not accepted according IEC standers

This should not be a problem but check with the manufacturer of the laundry equipment to be certain.

THe Filter capacitor value depnds on the maximum current I of the Power supply , Switching frequency and the permissible ripple

C= (I * (1/2f ))/ ( V * %Ripple) - for a full wave rectifier

C= (I * (1/f ))/ ( V * %Ripple) - for a Half wave rectifier

Where

C= Capcitance in Farads

I = Current in Amps

f = Switching Frequency

V = Nominal voltage in this case 12 V

Reji J Thoppil

The power rating of a resistor is determined by its physical size. The greater its surface area, the better it can dissipate energy, so the higher its power rating. Knowing its power rating and its resistance will determine the maximum voltage that can be applied to it in order to ensure the resulting current doesn't cause the resistor to overheat. This can be determined by manipulating the equation, P = U2/R.

ewan ko

The formula you are looking for is, kW x 1000/1.73 x volts x pf (power factor).

• the signal can be converted into digital form and can be stored for further reference.
• display of the data is possible on a CRO.
• reading of analog data with the help of electrical transducers has less losses involved as compared to mechanical transducers.

Oil Directed Air Forced , it's speical way to cooling transformers through predetermined pathes in transformer windings . this way provids fester rate of heat transfer .

In the home induction motors are used the most, because they are reliable and last a long time. They are the favoured type for refrigerators and washing machines.

The exception is portable appliances like vacuum cleaners and hand tools, which use commutator motors, basically the same as DC motors. These are preferred for their better power to weight ratio, even though they are noisy and require more maintenance such as replacement brushes and regular commutator cleaning.

Some types of electric clock use small synchronous motors that have permanent magnets built into the rotor. These motors produce only a couple of watts of mechanical power at the most.

there are 2 different types f excitation

1 seperately excited

2 self excited

Auxiliary longerons

its when theres a power supply inside like a power pack so u can carry it around with u

Not necessarily. It depends on what your current is, and what two points you are shocked by. The current will depend on the resistance of your skin, and the resistance in the circuitry of the taser. The Human skin is generally about 2.4-16Mohms (depending on the moisture, and salinity of your skin at the time. 300mA(milliamperes or.300 amps) is enough to stop the human heart. Let's say current is I, resistance is R, and voltage is V. Ohm's law states that E=IR therefore I=E/R. For this scenario we will say your skin is at a comfortable 4M(mega or million) ohms. I=100MV/4Mohm, I=25. Yes, 25 amps will kill you. But lets say we put a resistor on the negative side of the circuit. (This is important, when you say 100MV I assume it's positive DC voltage, it would be the other way around if it were a -100MV) We will say the resistor is 1Gohms (or 1 billion ohms, this is a gigantic resistor, and is not practical because the resistance through air is less and the electricity would just arc.) . add this resistance to your skin and you have 1.004Gohms. I=100MV/1.004Gohm, I=0.099, this amperage in DC voltage is not enough to kill you, but it is more than enough to kill you with AC. Realistically, 100MVDC will kill you, but not by stopping your heart, because you would have to have two contact points that cause current to cross your heart, and a taser is superficial (skin or shallow flesh) but it would blow a pretty big hole in you. When we had LORAN stations in the Coast Guard they used really big capacitors(which store voltage kind of like a battery, but discharge rapidly [about the nanosecond range]) and a guy accidentally backed into one that built up a charge over years, just from the static in the air, of about 25KV ,or thousand volts, DC, and it blew two quart sized holes in his hind end.

The dielectric material between the plates.

when the cable of a motor shorted then differetial relay act

One website states that one composite utility pole costs around $4,000.00 each. The price of four thousand dollars for each pole may vary by region and country. These poles are metal and withstand high winds, plus preventing animal damages.

A 'hot' terminal is a slang expression for the line terminal of an AC supply. In Europe, for example, a single phase supply to a building has three conductors: line conductor, neutral conductor, and protective (earth) conductor. The line conductor has a potential of 230 V with respect to the neutral; the neutral conductor is at approximately the same potential as the earth conductor. In North America, there are two line conductors, which are at 240 V with respect to each other, and at 120 V with respect to the neutral.

To my knowledge Zinsco/Sylvania breakers are the only breakers that will fit in a Zinsco panel. My recommendation as a journeyman electrician is to have your panel changed out. Those panels are old and outdated, not to mention replacement breakers are expensive. Most newer panels, and breakers are the cost of about 2 replacements.

the catch phrase is frank

what causes saturation in welding machine

Corn A biomass power station makes electricity from biomass fuel. Bio- means biological, as in living things. Biomass fuels are everywhere. Waste wood, walnut shells, landfill gasses, crops grown specifically for fuel, animal wastes, the list goes on and on. Examples would be a plant that burns waste wood chips to power a boiler that runs a steam turbine-generator, or methane gas from decaying matter in a landfill used to run a gas-turbine generator. Biofuels are also sometimes co-fired with coal to lower the emissions of a coal-fired plant.

Actually they are smoke detectors, they detect the result of the fire, smoke. A smoke detector works as follows: There is a chamber with a small nuclear source in it. Smoke particles are hit by the radiation and are ionized, ie, an electron is knocked off the particle leaving the particle with a charge on it. The chamber has two parallel plates in it with a voltage across the plates. The ionized particles are attracted to one of the plates, causing an electric current to flow. This current is amplified and detected and sets off the alarm.

While reactive loads do not dissipate the reactive component of the power supply current, these currents are very real. They must be generated, and so must be taken into account when designing the generator. They also flow in the feeder conductors, cause I squared R power losses and heat, and must be taken into account when sizing the conductors.

You can check it out yourself using these formulas. Watts = Amps x Volts. Voltage = Watts/Amps