Electrical Engineering

i working 66 kv and 220 kv substation. over substatin transformer and 66 kv sf6 bracker use i intersted for working of idmt realys with breacker tripping coil.

Dielectric heating is a type of heating used in engineering. Insulated materials are heated and then put over an electric field that changes quickly. It is usually used for making plastics and rubber.

Analysis can be done easily using PSCAD

ask my friend on 0402655877 hes a mechanic and can help you

is 3 phase Meter electicity to for the measurement of elektricity 3 phase.

Corner analysis is a worst-case approach, where you can simulate over multiple corners of process, power supply, and temperature.

THIS MULTIPLIER WHETHER USED FOR MEASURING POWER (WATT METER/KILOWATT METER) OR ENERGY (KILOWATT-HOUR METER) ARE USUALLY USED FOR HIGH AMPERE LOAD UNLIKE IN RESIDENTIAL APPLICATION THAT METERING ARE DIRECTLY CONNECTED TO SUPPLY LINE. THIS MULTIPLIER IS OBTAINED FROM THE RATIO OF CURRENT TRANSFORMER USED, FOR EXAMPLE 300:5 THIS MEANS YOU HAVE TO MULTIPLY YOUR GATHERED READINGS TO 60 TO HAVE THE ACTUAL CONSUMPTION. THE CURRENT TRANSFORMER (INSTRUMENT TRANSFORMER) IS NORMALLY SHAPED LIKE "DOUGHNUT" WHERE CABLE PASS THROUGH OR RECTANGULAR SHAPED FOR BUSBARS TO MEASURE ACTUAL LINE CURRENT AND COMBINED WITH POTENTIAL (VOLTAGE) TRANSFORMER FOR REMOTE METERING AND SYSTEM PROTECTION PURPOSES IN COMMERCIAL & INDUSTRIAL APPLICATIONS OR WHERE LOAD ARE HIGHER AND FOR SAFETY PURPOSES TO PERSONNEL/TECHNICIANS.

1. Generally speaking, a digital clock is a digital device. The "heart" of any clock is whatever is used as its time base, and with a digital clock, some kind of digital timing circuit supplies that time base. From there, digital dividers and other circuits count seconds, and other circuits drive a display.

2. Yes by definition it is.

Diode symbols look like open triangles with horizontal lines extending from either side. There will be a vertical line at the tip of the triangle that may have turned ends depending upon the type of diode.

There are many ways but never can you multiply the power.

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A current transformer is specifically designed, by amp turns, to only output 5 amps. Meters that are connected to CT's have a full range deflection (scale) of 5 amps. To do what you are asking seems pointless as there are no meters with 10 amp full scale deflection.

Dc invereters are not well suited as compared to ac inverters.This is due to the reason because ac inverters are more efficient ,less dangerous and good for supply over distance.

Overload fitness is when you work harder than regular fitness. For instance they exercise 2 hours a day but Monday they exercised 6 hours.

A 120 volt motor is the inducer motor. It works the furnace.

All of them. That's the definition of "conductor".

A coil of wire acts as an inductor; it will have a very small resistance, and a relatively large inductance. Power factor is effectively the resistance divided by the impedance (made up of resistance and inductance), so the larger the inductance relative to the resistance, the lower the power factor will be.

Some design engineers that make electronic circuits specify tolerances in the resistors because a resistor that is too out of spec would not operate properly. A resistor with a brown band I believe is within 20%, a black is 10%, and gold is 5%.

So if a resistor is rated at 3000 ohms, depending upon the band, it can vary a certain percentage. Resistors with the gold band I believe are called "precision resistors".

The more "precision" the resistor is, the more it costs. To keep costs low, tolerances are sometimes included to alert the assembler that a precision resistor may not be necessary. For instance if a value of 3000 ohms can be within 20% then a cheap resistor may be used and is not critical in the circuit.

The tolerances are introduced in manufacturing of resistors because practically, we can achieve 100% correct resistance. So, a tolerance range is indicated to make aware the users to select the proper resistor according to their application.

Don't believe what anyone tells you in the shop - sales brochures are usually either non-committal or over-optimistic - and sales clerks in bike shops simply don't know how the bike is actually going to be used!

If you are really serious about wanting to buy one of these electric bikes and you want to get the best value possible for your money, the only practical way to find out the answer to this question before you buy is to arrange with the shop to have test rides on a couple of bikes which match your budget.

Try them out for at least an hour on the kinds of journeys you want to make. A reputable shop will understand your need to do this, just as a car showroom will understand your need to drive a car before you buy it.

It is impossible to give a sensible answer to this question without knowing some more basic information because the likely distance traveled must always depend on:

* the weight of the bike including the main battery * the weight of any spare batteries carried

* the weight of the rider * the power of the electric motor * for any particular journey, how much of the route was downhill or uphill on average as well as the maximum gradient of any hills. * for what percentage of the journey the bike's battery will be allowed to "recover" either during stops on the way or by the rider pedaling the bike with the motor switched off * whether or not the bike's battery-control system allows the the battery to be recharged by using the the motor as a dynamo when the bike is ridden down steep hills.

Because it does not allow heat or electricity to pass them.

== == If you have to ask a question like this please do not open the cover of the amplifier.

Transistors are semiconductor devices which can be used as switches (to turn on and off an electrical signal or current path) and also as a signal amplifier in a circuit. There are two broad types of transistors BJT (Bipolar Junction Transistor) and FET (Field Effect Transistors).

- Neeraj Sharma

A transistor is a silicon device with 3 leads, emiter, collector, and base. It is used both as a fast switching device and for signal amplification. It is said to be "saturated" when maximum current is flowing and "cutoff" when no current is flowing from the emiter to the collector. It takes a difference of approx. .7 volts between the emiter and base to turn it "on".

Good switch but actually inferior in sound quality to its predicessor, the "Thermionic" or good ole vacuum tube. If you don't believe me, listen to a guitarist play through both a transistor and vacuum tube guitar amp. You will be quite amazed!!!

For signal amplification the input signal goes into the base and the amplified output signal is taken at the collector with the transistor operating, or biased, between cutoff and saturation. It would be normally biased in between cutoff and saturation for the signal to be "linear" or non distorted. The signal at the collector will be inverted (180 phase shift) with respect to the input signal.

There are other applications where the output is taken at the emiter where the signal is not inverted (in phase) with respect to the input signal. This configuration, generally, has no gain or has what is called "unity gain". Sometimes you see this when separate stages need to be impedance matched for maximum efficiency.

The transistor is first "biased" or configured for a specific amount of gain and the output signal is taken at the collector with a higher amplitude than the input at the base.

A transistor is a semiconductor device

used to amplify and switch electronic

signals and electrical power . It is

composed of semiconductor material

with at least three terminals for

connection to an external circuit. A

voltage or current applied to one pair

of the transistor's terminals changes

the current through another pair of

terminals. Because the controlled

(output) power can be higher than

the controlling (input) power, a

transistor can amplify a signal.

Today, some transistors are packaged

individually, but many more are found

embedded in integrated circuits .

The transistor is the fundamental

building block of modern electronic

devices, and is ubiquitous in modern

electronic systems. Following its

development in 1947 by John Bardeen ,

Walter Brattain , and William

Shockley, the transistor

revolutionized the field of electronics,

and paved the way for smaller and

cheaper radios, calculators, and

computers, among other things. The

transistor is on the list of IEEE

milestones in electronics, and the

inventors were jointly awarded the

1956 Nobel Prize in Physics for their

achievement.