Electrical Wiring

given a balance three phase, three wires system with star-connected load for which lime voltage is 230v and the impedance of each phase is (6+j8)ohm. find the line current and power absorbed by each phase.

Yes of course!!

10 kva electrical power is 10 kva electrical power either it would be three phase or single phase. But other factors i.e. current, voltage changes accordingly.

Actually this question is quit confusable. Because in 3phase system, if each phase gives 10kva power (single phase power = 10 kva) then 3 phase power will be 10 X 3 = 30 Kva

If we go leteratualy towasrds the question, then the asnwer will be - No. becasue 10 kva supply to 3 phase load will be 3phase supply(i.e440V) & 10kva supply to single phase load will be single supply (i.e 250V).

Answers does not have the ability to reproduce diagrams on the answer page.

20 Amp

I am assuming that you are talking single phase. 45 kva is k = 1000, v = volts, a = amps. 45 kva is 45000 volt / amps. Input 45000 divided by 208 volts = 216 amps. Output 45000 divided by 120 volts = 375 amps. There are other losses in the transformer but as a general rule of thumb this is the calculation that you would use.

a) Put 2 of the resistors in series to make a 200 ohm resistor. Then put the 100, 100, and 200 ohm resistors in parallel for 40 ohms. b) Put 2 resistors in parallel for 50 ohms. Put the 50, 100, and 100 ohm resistors in series for 250 ohms. c) Put 2 resistors in parallel for 50 ohms. Repeat with other 2 resistors. Put the two 50 ohm resistors in series for 100 ohms. This configuration can withstand 4 times the wattage of each individual resistor.

Across a 480 volt three phase system, 480 volts should appear across L1 and L2, L2 and L3 and L3 and L1.

Yes, a 130 watt fan can be plugged into a 120 volt receptacle. The current draw will be I = W/E, Amps = Watts/Volts = 130/120 = 1.08 amps.

Quadrature axis of a magnetomotive force is defined as that component of MMF that is directed along an axis in quadrature with the axis of the field poles. Quadrature axis of a magnetomotive force is defined as that component of MMF that is directed along an axis in quadrature with the axis of the field poles.

it was a house for the poor people.

No load current is excitation current, and is usually specified as a certain percent of base KVA rating at a specific voltage (often tested at 90, 100, and 110% rated voltage).

This can be found in the test report for the specific transformer in question, or should be supplied by the manufacturer.

Note it is specified as a percent of base, so if heated up from the high side, the current will be less than from the lowside - the transformer's excitation takes the same amount of power regardless of energizing voltage. You could test this roughly yourself by applying rated voltage to the lowside, and measuring the induced current.

The load current for a single phase 11kVA transformer would be: 11K / (L-N voltage).

The Society of Automotive Engineers (SAE) bulletin, J-1930, standardizes the name as a power-train control module (PCM).

it only studders at low rpm it runs great at high rpm or accelerating only at idle and take off rpm

A short circuit is simply a circuit in which the resistance is substantially low. This means that the current of electrons flows far too fast and overheats. This can also form electric arcs (electrons jumping from one point to another). Three common results of short circuits can be: overheating (causing fires), overheating (causing explosions), and electric arcs (causing electric shock).

Your simplest scheme would be to wire them in series - one after the other - thus presenting a 16 ohm load to the amplifier. This will cause no harm to the amplifier.

If you wired them in parallel, then the effective load would be only 4 ohms, and this would cause more load on the amplifier. Depending upon the design of your amplifier, this could cause more distortion.

In closing, it is only in the 'mid range' that the impedance of the speaker is the nominal load - say 8 ohm. At 'resonance' - generally at frequencies of a few tens of Hertz, the impedance of your speaker will be a few times its nominal impedance. At high frequencies, again the impedance of the speaker will increase to a few times nominal.

The lower-case 'k' in 'kV' (not 'kv') is a multiplier, representing 'kilo', meaning 'a thousand times', and the upper-case 'V' represents 'volts', the SI unit for potential difference. So a '220-kV' cable has a line voltage (voltage between conductors) of 220 kV.

write them down.

A GFCI (Ground Fault Circuit Interrupter) is designed to trip within milliseconds when it detects a fault, such as a ground fault or leakage current. This rapid response helps to protect against electric shock by quickly shutting off power.

This question does not make any sense at all. Please log in and edit this answer to explain exactly what you want to know. Then someone else may be able to give you a more useful answer.

The loosely bound electrons in each atom's outer shell.

Not enough information. To answer this question the amount of current in AMPS the circuit is drawing is needed.

The fan will spin slower, attempt to pull more current than it would at 60 Hz, and may therefore overheat (or blow a breaker).

these are circuits that manages tha functioning of the system or in other words are the ones that helps in the proper functioning of the system.