Electrical Engineering

It's double the frequency of the power source.

Dear Sir,I want to know that how much draw starting current of 380 volts 3 phase 50 hertz AC motors as per rating values?

Vtop = sqrt(2)*Veffective

so Veffective = Vtop / sqrt(2)

Yes it should. Each wire with reference to ground will have a potential of 115 V and obviously 230 V between the two. The neutral in your system is a tap taken off the middle of the winding between your two main conductors. So again yes they will both be hot and should be de-energized if any work is being done.

45A

the difference between a step up transformer and a step down transformer is that, in a tsep up transformer, the voltage secondary is greater than the primary side but in a step down transformer, the voltage secondary is lesser than the primary side

rms voltage will give the ability to predict how much work will be done by an ac voltage. the rms value of a pure sine wave is 0.707 times it's maximum amplitude.

Individuals of a team are integral to the success of a team. Each person will contribute to the team according to their strengths and weaknesses and each will contribute accordingly.

First, you have to set your VOM to continuity. The symbol looks like an arrow with a line at the end of the arrow. After that, touch the two probes to two areas and if they have continuity you will get a reading on your meter and some even beep. Don't worry about the number, if it reads anything at all it still has continuity.

It is in millivolts (less than a volt).

It isn't!

Ottó Bláthy, Miksa Déri, Károly Zipernowsky of the Austro-Hungarian Empire First designed and used the transformer

Removing the resistor that you are measuring while the circuit is still on, would create an excessive amount of current to flow through the galvanometer, possibly damaging it.

low cost

Bus bars need to be meggered to make sure that there is no shorts between the bars and from the bars to ground. Usually electrical engineers have a list that has to be checked off and values written down before any energizing of the equipment will be allowed.

To enable any gases generated within the transformer to bubble along the pipe towards the expansion tank. The Buchholz relay itself isn't angled; it's the pipe in which its fitted.

around $500 a pole and $2 a foot

about $1000 for the pole mounted transformer

poles need to be less than 100' apart

It rotates the rotor. Torque is produced by the magnetic force on the current induced in the squirrel cage. This magnetic force acts as torque on the rotor as a tangential force that makes it spin.

its to differentiate d working and faulty of d instrument.

live zero-even when the i/p s zero,o\p has sme value..4mA..

dead zero-if d instrument s faulty,it wl show d real zero value..below 4mA..

std accepted value is 4-20mA..

The formula you are looking for is (amperage when kilowatts are shown). 1 MW = 1000 kW.

I = kW x 1000/ 1.73 x E x pf. 1000 x 1000 = 1000000/1.73 x 11000 x .90 = 1000000/17127 = 58.38 amps.

1 mega watt is 1,000,000 watts

Lbb means local breaker backup protection

It's always an interaction of volts and amperes, so even if you would have posted a complete question (a strip of what?) it wouldn't have been possible to answer.

it is a type of forced commutation technique of thyristor