Electrical Engineering

A relay race could be a good model of a series circuit. In any circuit, current flow is the daisy-chaining of electrons from atom to atom.

join two 6 vault battaries two make 12 vaults

There is insufficient information in the question to properly answer it. You need to provide more information, such as the voltage across resistor four, or more details about the rest of the ciricuit. Please restate the question.

To answer this question the voltage of the compressor is needed.

Yes, but only factory assembled units listed as such.

fpga and plc are two completely different things. FPGA( field programmable gate arrays) are building blocks of electronic sysytem where as plc are systems. Comparing these two is like comparing engine with car.

Back up generators

Sometimes it is necessary to let motors cool down if they are a heavy duty motor, like on an air compressor, but you can actually put a fan up against a motor to help keep it cool, if it can't be shut off for a long period of time.

A fan motor doesn't need to be cooled down, because it is actually kept cool, with the fan blade sitting in front of it.

But if it is on farm machinery I would suggest you give your motor at least 30 minutes to an hours rest, just to protect the life of the motor and keep it from overheating.

Armored electrical cable contains insulated electrical service wires protected by a flexible steel covering. Metallic Conduit is a tube or pipe though which we lay electrical cable.(Most commonly lighting cables).

It can be calculated by a multimeter. [aka. avometer (ampere voltage ohm meter)]. A single voltmeter or ammeter could not measure resistance because this process need calculations. That means the device must be able to measure the voltage and current at the same time.

Consult with the owner manual for the correct steps in sequence.

Calculate the ampereage at .8 pf and take a breaker of 150% of ampere nd set the over current protection at 125% of full load current.

Air insulated means the substation is in the open air, and the dielectric strength of the air is used to isolate conductors from each other and from ground. Gas insulated means a specific gas is used for insulation; this gas is usually an inert gas such as nitrogen. Gas insulated substations, by definition, are required to be inside a contained structure, or large piping must be placed around all conductors to hold the gas.

All motors require electrical conductors in their rotor!

109 for Corona light, and 148 for Corona extra

Vo=(R2/R1)(V2-V1)

12V. Every resistor in a parallel circuit shares the same voltage. It is the current that gets divided.

For a sine wave, the RMS is the amplitude divided by square root of 2. The amplitude is 10 cm. in this case; so the exact value is 10 / root(2), or about 7.

For a sine wave, the RMS is the amplitude divided by square root of 2. The amplitude is 10 cm. in this case; so the exact value is 10 / root(2), or about 7.

For a sine wave, the RMS is the amplitude divided by square root of 2. The amplitude is 10 cm. in this case; so the exact value is 10 / root(2), or about 7.

For a sine wave, the RMS is the amplitude divided by square root of 2. The amplitude is 10 cm. in this case; so the exact value is 10 / root(2), or about 7.

If the load requires a single circuit breaker, as most three phase loads do, you need a separate neutral for each. This allows you to check the balance between each phase and the other phases as well as neutral, in order to detect a ground fault.

It depends on the purpose of the three phase circuits - if this were CT cables, then yes, unless you intentionally over sized the ground wire. Otherwise this would cause unusually high voltage rise in the secondary of the CT during ground faults, which could lead to saturation (unless CT ratio is intentionally set high). As noted above, having separate neutrals helps to determine balance, although you can measure 3I0 from the phase currents for a similar relationship without actually looking at the neutral at all (some relays doe this for ground protection instead of directly measuring neutral current, see SEL's 351 for an example relay). No matter what, this would be highly irregular, and I wouldn't recommend scrimping on a neutral. In my experience, the more you move away from accepted practices (not to dampen ingenuity...), the more trouble you create for the future.

If the loads were strictly three phase then there would not be any neutral needed. If from a three phase distribution panel the loads were three single phase loads then you can use one neutral for the three phase wires. This is a code rule that has to be adhered to. A same N, B same N, C same N and only in this combination. Conduit fill 4 wires, two three phase four wire circuits, conduit fill 8 wires.

thanks to ohm,,who invented the answer.according ohms law,V voltage=R(element)xI amps.then.....answer is....100 volts.

Phase monitors are used to detect single phasing, or loss of one phase of power from a three phase system. Most of the time they are used on very expensive motors such as high horsepower. They will shut down the starter, therefore shutting down the motor if all three phases are not available. One cause of this would be if there are three separate fuses protecting the motor and only one of them blows. The reason they are needed is because if you only send two phases to a three phase motor, it has a good chance of burning out the motor.

sinusoidal with non-zero average.

A: Eddy currents are current losses if an iron bolt is used to hold the core lamination together that alone will cause losses. Usually a brass bolt is used to eliminate losses

the SCT is used to provide excitation during short circuit conditions. under Short Circuit the voltage may drop below threshold level causing field current to drop, to avoid over excitation by the AVR, the short circuit provides the excitation energy required to maintain a voltage that allows protective devices to operate and isolate the fault.

the SCT is open under normal operating condition