Electrical Engineering

it is amount if current takes for unit diffection in given galvanometer

Since there is no sufficient power available as per the demand

Original use was in the 50's when a stove and dryer was installed but the service could not handle both. The load shedder would automatically turn off one of the appliances so the other could run.

Industrial shedding could be multiple air compressors. As the pressure in one is close to minimum, another would be stopped to allow the low one to start.

Allowing more machinery to be connected to a service than it could handle without load shedding.

Disadvantage is that the shedded load may be necessary.

If it doesn't work at all there is not much what you can do because the internal firmware was already changed and you cannot undo this. You might have to send to the manufacture if it has warranty. If it doesn't you will have to buy another one.

due to unbalance load 1. Due to negetive phase sequence components in current generator and transformers suppling the load will be over heated 2. The opposite torque on the shaft will damage, rotors are more likely to damage. 3. High current through neutral of the system, normally neutral cable conductor is of lesser size then phase and hence it may be damaged.

As an electrician, the circuit would be tested for voltage before starting any work. All people that deal with electricity for a living have testers. For people that are weekend electricians it should be suggested that they also buy one for their own protection.

5 Time constants

1T 63.2%

2T 86.4%

3T 94.9%

4T 98.1%

5T 100%

maybe, but you have to see if the wires and the motor can fit it. That would be great if you can but the bad thing is the motor is made for a cycle with bigger batteries. the ride time would be cut in half because of the elctric draw.

Mauritius uses 230 V @ 50 Hz (the US and Canada are 120 V @ 60 Hz)

check this link

http://www.dnatechindia.com/index.php/Tutorials/8051-Tutorial/Interfacing-ADC0808-To-8051.html

Most electrical switches even if designed and built correctly have a small amount of resistance to current flow.The upshot of this is that power is lost in the switch when current flows, ( from Ohm's Law: W=I x I x R, where W = watts, I = Amps , R = Ohms) In conclusion, where current flows through a resistance ( in this case the switch ) power is lost in the form of heat. Generally a 20A switch would be 'warm' to the touch, if it is 'hot' then this may indicate that the switch has a fault, for example a loose joint/connection or deteriorated contacts. Most electrical switches even if designed and built correctly have a small amount of resistance to current flow.The upshot of this is that power is lost in the switch when current flows, ( from Ohm's Law: W=I x I x R, where W = watts, I = Amps , R = Ohms) In conclusion, where current flows through a resistance ( in this case the switch ) power is lost in the form of heat. Generally a 20A switch would be 'warm' to the touch, if it is 'hot' then this may indicate that the switch has a fault, for example a loose joint/connection or deteriorated contacts.

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This seems like a question from an electrical course, and is probably best answered by your course materials. It's your test question, not ours, and there won't always be someone else to ask for the answer. Earn your diploma.

Cast-resin power transformers encase the windings in epoxy resin. These transformers simplify installation since they are dry, without cooling oil, and so require no fire-proof vault for indoor installations. The epoxy protects the windings from dust and corrosive atmospheres. However, because the molds for casting the coils are only available in fixed sizes, the design of the transformers is less flexible, which may make them more costly if customized features (voltage, turns ratio, taps) are required.

Nope. Nice try though. Folks have been trying to do this as long as there have been machines. Do a Google search for 'perpetual motion machine' and you'll see what I mean.

As both batteries have exactly the same output voltage 9.6 Volts, there will be no effect to the device.

The bigger battery just lasts for a longer period of time before it has to be re-charged.

You can get an approximate idea of how much longer by doing some simple calculations:

If the device takes a current of 100 mA,

* it would run for 700 /100 = 7 hours on the 700 mAh battery

* it would run 2500/100 = 25 hours on the 2500 mAh battery.

A lift, or an elevator, is run by the suspension of a boxed shaped enclosure on cables. To make the elevator go up, the cables are pulled from below through the use of a pulley system. The same is for going down except there are a series of brakes applied to make sure the cable does not fall.

Power outages is not a big concern and is rare

it is a theory in which your chalkras can never be satisfied. you are costantly taking energy from those around you but in turn losing it almost as fast. if you go to some of the psychic vampire support sites you would get more information.

A wetting voltage is a minimum electric current needed to break through the surface film of a contact. This film occurs most in areas of high humidity, and as such wetting current is needed for systems with delicate switches.

Due to the problems in the ballast.
Replace the ballast.

A short circuit study is required for that, modeling the electrical system. The short circuit current is also directly dependent on the location of the building system relative to the power grid and type of transformer bringing power into the building.

For starters and keeping it "basic" look for Cooper Bussman's Point to Point Method of Short-Circuit Calculation. That is a good start and depending on what you need a good start. Remember to contact the utility company for available fault current, type of voltage transformer, transformer impedance and size.

If you want to get technical, get SKM's software (expensive though). With it you can go several steps further into short circuit analysis, selective coordination and finally arc-flash protection.

Hope this helped.

JP Ross, Professional Engineer

it requires lesser space compare to normal. design of switch gear is more compact , has the potentials to increase system reliability and has less maintenance and longer service life.

A telegraph circuit is an electrical circuit attached to a telegraph. This circuit is incomplete until the telegraph is connected, allowing for the Morse-code messages by tapping the circuit closed.