Electrical Engineering

EFF1 is a high efficiency motor.

EFF2 is a standard efficiency motor.

Prefabricated power distribution substation

Its basically a whole 11kv substation but in one unit. It contains a transformer, ring main unit, fuse board and circuit breakers etc. It still uses as much space as a normal substation that houses a separate transformer, ring main unit etc but is easier to transport and is probably cheaper.

Voltage and current are two different things.

Voltage is the electric potential difference between two points. Expressed in volts, it is also joules per coulomb.

Current is the charge flow past a point. Expressed in amperes, it is also coulombs per second.

You can relate voltage and current using Ohm's Law, which states that voltage is equal to current times resistance.

Resistance is, therefore, equal to voltage divided by current. Using base units, resistance is equal to joules per coulomb divided by coulombs per second, which simplifies to joule-seconds per coulomb squared. That is a difficult unit to write, so we just use ohms as the unit.

I am not to sure about Static Ram but in CMOS RAM, 1GB of RAM would contain about 137438953472 transistors because 1 bit of CMOS RAM contains 16 Transistors, 8 bits in a byte and 1073741824 bytes in a gigabyte.

I am 100% sure about this and these are just estimations.

Static RAM uses about 6 times as many transistors as dynamic RAM for the same amount of storage. Dynamic RAM uses 1 or 2 transistors per bit in typical implementations. Add to this transistors for address decode, bus interface, etc.

Yes, but the transformer must have both the hot and neutral to work as designed. A auto-transformer is not a variable resistor that could reduce current/voltage by a change in the resistance which could be used in the hot and or neutral wire. An auto-transformer is designed to have the hot wire and neutral on each end of the winding with a variable tap in between. The resistance of the transformer and the inductance will effect the circuit to a limited way if placed in the neutral but this effect will not vary the voltage over the full range, the amount of voltage reduction will vary with the load's current draw, see ohms law. Neither a resistor or a auto-transformer connected in the neutral line only will increase the voltage above the level of the input like a correctly connected auto-transformer . Stanley

It is a step down transformer which is used to supply the electrical power to the station transformers and the colony transformers

watts

a shunt coil needs external supply & tripping coil gets supply from itself.

Once a circuit is designed the means to connect all devices comes under a layout on a PCB printed circuit board. the layout means locating and connecting all of the designed circuit.

Yes. The Engineering profession in general has become much more self organized and regulated in the past few decades. Today ... for the protection of the public, and to the benefit of the legitimate Engineers themselves ... it's no longer possible in most places to represent one's self as an Engineer for the purpose of private practice without a State certification, and it's no longer acceptable to apply for a job as an Engineer without a college degree in Engineering.

Batteries provide Direct Current (DC) while household outlets provide Alternating Current (AC).

A graph is divided into 4 sections by one vertical line and one horizontal line. Each of the resultant sections is called a quadrant.

It is measured in amps. It is related to voltage and resistance by Ohm's Law. It is the flow of electric charges.

A winding that has several coils shorted together.

b. crank

A gas discharge lamp has a gas and has a cathode, an anode, and an ignition electrode. Individual discharges of a series of lamp discharges are spaced at least one millisecond from each other, and the individual discharges are generated by providing an electrical charge between the cathode and the anode and providing two or more electrical pulses to the ignition electrode. The second and following electrical pulses occur within a predetermined time of the first pulse. The electrical charge between the cathode and anode is of sufficient voltage and current to create an electrical arc between the cathode and the anode with the gas is ionized.

Unless a burden (i.e. meters, relays, etc.) is connected to the CT, current transformers should always be shorted across the secondary terminals. The reason is very high voltages will be induced at the terminals. Think of the CT as a transformer, with a 1 turn primary and many turns on the secondary. When current is flowing through the primary, the resulting voltage induced in the secondary can be quite high, on the order of kilovolts. When a CT fails under open circuit conditions, the cause of failure is insulation breakdown, either at the shorting terminal strip, or at the feedthrough (in the case of oil filled apparatus), because the distances between terminals are not sufficient for the voltages present.

the fault in electrical transmission line which give rise to symmetrical fault current is called symmetric fault. e.g; L-L-L-G fault. the fault in transmission line which give rise to unsymmetrical fault current is called unsymmetrical fault.e.g; L-L , L-L-G , L-G fault to solve the unsymmetrical fault, the fault current can be represented by sum of the sequences--zero phase sequence , +ve phase sequence , -ve phase sequence. where L:line G:ground

y=IxI

Conductor combining the functions of both a protective earthing conductor and a neutral conductor

I'm not sure what you're asking - is DG distributed generation? Full load would be provided by the DG; if it's a 40MW wind farm, it will be able to provide you with turbine data; each turbine will be able to provide so much kVA. I would use this number (instead of kW output) for sizing of equipment as this would give a maximum. You may also need to take into account any D-VAR and capacitor bank effects on this cumulative KVA.