0
Add your answer:
Earn +20 pts
Where would you use an inductive load?
An electrical motor is an example of an inductive load. Solenoids and contactor coils are also in this category of induction dependant devices.
What is the use of freewheeling diode in igbts?
To protect module from freeewheeling during off period with inductive load.
What is power factor correction?
In AC electric systems, electrical energy is consumed by resistive loads. An AC generator sends out energy, and a resistive load takes the energy in.But in AC systems, electrical energy is not consumed by pure capacitor loads. Neither is it consumed by pure inductive loads. Instead these loads reflect all energy back to the generator. They don't consume any electrical energy themselves. Ideally this shouldn't cause problems. However, in the real world a pure capacitor load will cause the power lines to become warm. While the energy flows out and back, there is an electric current in the lines. The same thing also happens with a pure inductive load. The loads reflect all energy and consumes none, but the utility company must use up fuel to keep sending out the reflected power and warm the power lines.If large industrial customers place inductive or capacitive loads on the power grid, the utility company installs special electric meters to measure this. The electric company then charges them a fee. The industrial customer must pay for the energy losses they cause in the warm power lines.In AC electrical mathematics, the reflected power effect is described as REACTIVE POWER, and is measured in terms of POWER FACTOR. A resistive load consumes the incoming energy, and it has a power factor of 100%. On the other hand, pure capacitors and inductors reflect all the incoming energy, and they have a power factor of 0%.There is a way for industrial customers to fix the problem. There is a way to correct the power factor and bring it to 100%. If the customer is using an inductive load, they can place just the right value of capacitor across that load. The energy then stops reflecting back to the electric company generators. No longer do the power lines suffer excess heating. The electric company measures this, then stops charging the extra fee. (Actually the energy still reflects back and forth between the inductive load and the added capacitor. The excess heating in those short local wires is insignificant.)Since large industrial customers commonly use AC motors containing coils, they commonly create inductive loads on the power grid. Power-factor correcting capacitors are the solution. They eliminate the extra fee charged by utility companies, so a PFC capacitor will eventually pay for itself. However, such capacitors cannot save money for individual homes or small businesses. These customers don't have the special electric meters, and the utility companies aren't charging any special fees for bad power factor. Those PFC capacitors don't save any money, and can never pay for themselves.Power factor is the cosine of a circuit's phase angle, i.e. the angle by which the load current lags or leads the supply voltage. When they are in phase (phase angle is zero), the power factor is unity (i.e. 1); when they are 90-degrees out of phase, the power factor is zero. 'Poor' power factor (i.e. when it is closer to zero than to unity) results in excessively-high currents for a given value of load; power-factor correction (or 'improvement') acts to move the power-factor towards unity, thus reducing the value of that load current. This is desirable, as it reduces the necessary amount of copper (i.e. the cross-sectional area) of conductors and other equipment supplying the load. For inductive loads, power-factor correction is achieved through the use of capacitor banks.
How capacitor banks maintains the power factor?
Capacitor bank is use to control the power factor of the load, because there is many inductive load in the circuit which is the cause of the lagging P.F, so we use the capacitors to maintain the P.F to the unity, the capacitor have the nature of the leading P.F that's way the resultant P.F of the load's lagging and the capacitor's leading current is near to the unity, and the unity P.F has very good effect on the network.
Why does a ceiling fan utilize reactive power while all the electrical appliances use active power?
Reactive power is power that flows back and forth between the inductive windings of the motor in the fan. If an appliance doesn't have a motor then the power it uses could be classified as Active in that it provides a load to the power company generator.
Do air conditioners use resistive load or inductive load?
resistive loadAnswerIf the current is driving a motor, then the load is resistive-inductive.
What is the use of a power supply?
power supply is a device that supplies electric power to electrical load
Where would you use an inductive load?
An electrical motor is an example of an inductive load. Solenoids and contactor coils are also in this category of induction dependant devices.
What is the effect of inductive load in distribution system?
Inductive load where current lags voltage to keep the power factor low thus increasing the consumption of more electrical units of supply provider. This is since an inductive load draws reactive power as well with active power. Reactive component is watt less power drawn from the source. We use only active part of the source. But pays from active+reactive parts. This low power factor also effects the other systems in the circuit virtually making the cables under sized by heating them
What is meant by an inductive and capacitive loads?
A transformer would be an inductive load. The coil of a relay would be an inductive load. Inductive loads use magnetic fields, ie motors, solenoids and relays. Capacitive loads are ones that capacitance exceeds inductance. ie flash on camera.
What does inductive load effect on High Voltage transmission line?
the inductive load which is generally use in high voltage transmission line known as transformer. the transformer transform the high voltage to low voltage.
What is the use of freewheeling diode in igbts?
To protect module from freeewheeling during off period with inductive load.
What is power factor correction?
In AC electric systems, electrical energy is consumed by resistive loads. An AC generator sends out energy, and a resistive load takes the energy in.But in AC systems, electrical energy is not consumed by pure capacitor loads. Neither is it consumed by pure inductive loads. Instead these loads reflect all energy back to the generator. They don't consume any electrical energy themselves. Ideally this shouldn't cause problems. However, in the real world a pure capacitor load will cause the power lines to become warm. While the energy flows out and back, there is an electric current in the lines. The same thing also happens with a pure inductive load. The loads reflect all energy and consumes none, but the utility company must use up fuel to keep sending out the reflected power and warm the power lines.If large industrial customers place inductive or capacitive loads on the power grid, the utility company installs special electric meters to measure this. The electric company then charges them a fee. The industrial customer must pay for the energy losses they cause in the warm power lines.In AC electrical mathematics, the reflected power effect is described as REACTIVE POWER, and is measured in terms of POWER FACTOR. A resistive load consumes the incoming energy, and it has a power factor of 100%. On the other hand, pure capacitors and inductors reflect all the incoming energy, and they have a power factor of 0%.There is a way for industrial customers to fix the problem. There is a way to correct the power factor and bring it to 100%. If the customer is using an inductive load, they can place just the right value of capacitor across that load. The energy then stops reflecting back to the electric company generators. No longer do the power lines suffer excess heating. The electric company measures this, then stops charging the extra fee. (Actually the energy still reflects back and forth between the inductive load and the added capacitor. The excess heating in those short local wires is insignificant.)Since large industrial customers commonly use AC motors containing coils, they commonly create inductive loads on the power grid. Power-factor correcting capacitors are the solution. They eliminate the extra fee charged by utility companies, so a PFC capacitor will eventually pay for itself. However, such capacitors cannot save money for individual homes or small businesses. These customers don't have the special electric meters, and the utility companies aren't charging any special fees for bad power factor. Those PFC capacitors don't save any money, and can never pay for themselves.Power factor is the cosine of a circuit's phase angle, i.e. the angle by which the load current lags or leads the supply voltage. When they are in phase (phase angle is zero), the power factor is unity (i.e. 1); when they are 90-degrees out of phase, the power factor is zero. 'Poor' power factor (i.e. when it is closer to zero than to unity) results in excessively-high currents for a given value of load; power-factor correction (or 'improvement') acts to move the power-factor towards unity, thus reducing the value of that load current. This is desirable, as it reduces the necessary amount of copper (i.e. the cross-sectional area) of conductors and other equipment supplying the load. For inductive loads, power-factor correction is achieved through the use of capacitor banks.
Can an electric transformer send too much electricity to the meter causing a high electric bill?
An electric transformer does not send electricity to the meter it supplies a source of power that is requested by the demand of the load. The meter is a device which totals the amount of power that you use. This is the amount that you are billed for. If your electrical bill is high only you can reduce it by decreasing the load demand.
Why power factor is used?
Power factor is the ratio of real power over apparent power. In a purely resistive load, real and apparent power are the same, so the power factor is one. In a reactive load, such as an inductive or capacitative load, however, current lags (for inductive) or leads (for capacitative) the voltage. This phase angle means that, at certain portions or phases of the line cycle, the load is feeding power back into the source. A wattmeter connected would read lower than actual, so the apparent power would be less than the real power, and the power factor would be less than one. In fact, if the load were truly reactive, such as an ideal inductor or capacitor, the current would lag or lead by 90 degrees phase angle, and the power factor would be zero. Power would still be supplied and used, but the meter would stand still. Power factor is used to compensate for the "error" in the meter, so that the user can be charged correctly for their true power usage. Power factor is also used to determine the amount of capacitative or inductive compensation to use on a circuit to correct a poor power factor.
How capacitor banks maintains the power factor?
Capacitor bank is use to control the power factor of the load, because there is many inductive load in the circuit which is the cause of the lagging P.F, so we use the capacitors to maintain the P.F to the unity, the capacitor have the nature of the leading P.F that's way the resultant P.F of the load's lagging and the capacitor's leading current is near to the unity, and the unity P.F has very good effect on the network.
Why does a ceiling fan utilize reactive power while all the electrical appliances use active power?
Reactive power is power that flows back and forth between the inductive windings of the motor in the fan. If an appliance doesn't have a motor then the power it uses could be classified as Active in that it provides a load to the power company generator.
