Electrical Engineering

This is a 3-phase, dual-voltage motor. The 12 leads represent six different windings. For the higher voltage, pairs of windings are connected in series, then the three resulting pairs are connected into a delta configuration to tie to the power source. For the lower voltage, the pairs of windings are instead connected in parallel before combining them into the delta configuration. The windings MUST be combined in the proper order AND in the correct phase for it to work. Mistakes result in great quantities of smoke being released! Each of the leads should have a label, such as T1, T2, T3, etc. It will be either an adhesive label or sometimes printed in ink right on the wire. There is no standard labeling scheme, so each manufacturer always shows the connections for each voltage on the motor nameplate. There is no real way to guess at this, if the nameplate is missing contact the manufacturer for a diagram.

When several outlets are on the same circuit the current comes first from the breaker panel to one outlet where it is connected to a duplex receptacle and/or switch or light, then to the NEXT outlet, light or switch. If a connection was not made properly at any point along the way it can corrode or somehow loose connection back to the breaker panel. If that happens, every outlet DOWNSTREAM will not be working properly. If you cannot track down the problem yourself, you will need to hire an electrician.

Efficiency = workout / workin * 100% how do I format this in the worksheet if the workout=KG what the work in will be?

No. By "energy", you must mean "power"?

Energy = power * time.

Anyway,

No transformer can step up energy. Even in a perfect transformer, you would only receive the energy output equal to the energy input.

There is always some loss of energy due to resistance of the windings and unwanted electrical currents induced in the core. Both convert some of the energy input into heat.

Fox news, cause it is fair and balanced.

100 Base-FX 1000 Base LX

The Buchholz relay is installed in an inclined position because of buoyancy. Slightly inclined so the gas bubbles will flow to the cover and then to the Buchholz relay and not stay in a pipe corner.

They store charge between their plates in an electric field

inductive appeal

An ammeter is a measuring instrument used to measure the electric current in a circuit.

If you mean by that a normal home ceiling fan, No, you can't. Because it is an AC motor inside that. If you use fans using DC motors ,motors like the ones used in many toys for example or the ones used inside the earlier cassette or vcr tape drives, yes ,you can use DC.

120

I want to purchase some tools for electrical motor rewinding work hence please give me list of tools available to u with price list.

E-MAil- davidph68@hotmail.com

linear with a negative slope

It could be anything, it depends on the design of the motor and whether it is a high-power or a low-power motor.

to calculate:

1hp=745W

3hp=745*3=2.2Kw

assuming a 3 phase motor

power is V*I*pf*the square root of 3

I would gues a PF of 0.8 if its a resonable motor which gives about 7.2 amps per phase.

if the PF is bad say .65 it could pull up to 9 amps

in short, too little information to give you the actual answer.

Approximately 10-15% of triglycerides cannot be converted to glucose. These triglycerides are primarily stored in adipose tissue and are used for energy production through beta-oxidation in the liver, rather than being converted to glucose.

So that, as a user of electricity, he or she does not have to rely on only one local power generating station.

A National Grid is a network of electricity supply lines carrying power from various generating stations There is usually more than one supply line to most points (or grid nodes), from more than one generating station.

So, by using a National Grid, users can continue to receive power from the other power stations in the network whenever a power station or a distribution sub-station has to be taken out of service for maintenance work or when some power lines are destroyed by bad weather.

Yes a circuit breaker is a switch but it should not be used as a switch. The continuous turning off and on of a breaker weakens the internal mechanism and reduces the tripping value of the breaker. There is in the marketplace breakers that are designed to be used as switches. These are usually used in large warehouses where the lights are turned on in the morning and shut off at night. Using these specifically designed breakers for switches does not wear out the tripping mechanism or reduce the tripping value.

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A circuit breaker can be used as a switch, although in most cases there are less expensive switches you can use.

A fuse is a device used to keep electrical circuits from overheating is not a true statement. A fuse is used to protect the wire of the circuit from an over current being applied to the circuit. This over current could be caused by a couple of scenarios. Two non insulated conductors touching one another and creating a short circuit. Another cause could be an non insulated conductor touching adjacent grounded equipment. Whatever the cause the fuse will isolate the fault instantaneously.

For LT cable

1. Use : Up to 690V

2. Insulation : PVC

3. Core(Neutral) : Yes

4. Insulation Grading : 1100 V

For HT cable

1. Use : Above 690

2. Insulation : XLPE

3. Core(Neutral) : No

4. Insulation Grading : Above 3.3kV, 11KV..etc

( Please note that now 690 V using in VFD application with LV cable and 440 V for DOT motor starter)

from

Kunal Singh Dabi

the_dabi@rediffmaill.com

'single line diagram' or ' one line diagram' is basically a first step in planning substation layout providing the information about switching and protection arrangement required including the incoming lines and outgoing feeders.

400kv, operating voltage, which is to be considered for the ratings of electrical equipments

are supplied by circuits on oppsite legs of the service entrance panel . if each load draws 30amps ,what is the current flow in the neutral wire