Electrical Engineering

Type your answer here..yes.

There is usually a reserve switching device or scheme which is activated when the power coming from the main grid disappears. When such an outage happens, the scheme will sense it and disconnect the circuitry from the main source of power (grid) and start up the emergency generators. When the main power is restored, the system will connect you back to it and turn off the emergency generator.

Class Y insulation can withstand a max temperature of 90 degrees centigrade. Examples are Cotton, Silk, Paper, Wood, Cellulose, etc.

More than likely, yes. First, make sure you took due caution to avoid a slip and fall. Such things like not using the railing provided right down to simply not watching where you step to make sure you step on the step can cause you to lose your case. Most insurance companies will take care of your medical bills if you show you were not negligent and the property owner followed all the safety laws such as having an appropriately placed handrail, keeping the steps clear of debris as much as humanly possible and keeping the steps in good repair. If, however, the property owner has been negligent in some way and you can prove it, you may have an additional case against the property owner for pain and suffering damages. For this, it would be best to consult with a lawyer as different cities have different laws concerning the responsibility of the property owner.

reactance relay is used for distance protection of the transmission line....

it does not meet,positive goes to positive and negetive to negetive.

Current transformers produce a ratio of primary current in the secondary. If the secondary of a CT is open circuited, and primary current is flowing, the CT will try to push that same ratio of current through the secondary open circuit. This causes secondary voltage to climb until it the secondary open circuit flashes over. This can often damage the CT.

Transformer

If you want to install a phase converter, there are specific directions that you must follow. First, shut off the electricity to the device. Next, install the converter in a dry and vibration free environment. Install a ground cable that will run from the device to the converter.

235.6 volts.

KCL (Kirchoff's Current Law) applies to any circuit, not just parallel circuits. The sum of the currents entering a node will always equal the sum of the currents leaving the node.

KVL states that the sum of the voltages around a closed loop is always zero.

Semiconductor resistance depends on temperature.

So, you can use a shunt resistor to measure semiconductor voltage with a given current and, then, obtain temperature.

In countries that are governed by electrical codes, electrical contractors abide by the rules set out in their areas code books. Within these publications there is information for the electricians that are doing the work. Conductor selections and calculations are used for proper sizing of wire. Pre calculated tables and rules tell the sizes and the method to install the equipment so that at the end of the project when the job gets its safety inspection, it will pass.

Surge suppressor

Electrical and Electronic Engineering degree

commutator

beacause ammeter is use to measure the current not to measure the voltage

Store accounts can be pretty much charged on indefinitely. Provided one pays them off in a timely manner. If one does not, at some point a store will no longer honor a cardholders card because the cardholder has violated the service agreement by not keeping the account current (paying the bill).

A welding generator is an electricity generator that is commonly used in places where the power needed to arc weld is not readily available. They are usually powered by gas or diesel engines and have a high, stable energy output suitable for powering a welding machine.

The frequency of 50 Hertz (or 60 Hertz in other countries) was selected to reduce inductive power losses caused by long distance power line transmission and still enable alternating current to be converted to various voltages and currents using moderate sized transformers at the point of power use.

The higher the power frequency the higher the inductive losses over a length of power transmission line.

For this reason frequencies higher than 60 Hertz are avoided.

Where possible electrical power transmission over long distances these days is accomplished with high voltage direct current, which is converted to alternating current near the usage areas.

Tektronics and Agilent (Agilent Technologies, a spin-off of Hewlett Packard) are top notch, but there are others.

Not directly. But if the linemen are reconnecting a three phase line that has been blown down and are not paying attention when the line goes back up the phasing could be changed. All it takes to reverse three phase is the interchange of any two of the three lines. On a job in St. Lucia in the Caribbean we had to put phase reversal monitors on all the equipment we installed as this actually happened once.

First you have to understand how a generator works. Basically the excitation voltage is what varies according to generator output. Usually on a power source that has a inconsistant rpm, the excitation voltage will vary similar to a govenor in order to hold the generator output constant.

maglev train works on alternating current..The electric current supplied to the coils in the guideway walls is constantly alternating to change the polarity of the magnetized coils. This change in polarity causes the magnetic field in front of the train to pull the vehicle forward, while the magnetic field behind the train adds more forward thrust.