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What is the meaning of load factor?

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2015-07-17 17:29:33
2015-07-17 17:29:33

"Load Factor" is an indicator of how steady an electrical load is over time.

If your electric billing rate includes both an Energy (kWh) and Demand (kW) charge, your load factor can be calculated by the following formula:

L.F. (percent) = [(Total kWh)/(# Days in Bill Cycle x 24 hrs/day)]/[Peak kW Demand]

If your load factor is low, you should look for ways to even out your electrical usage (i.e., shift energy intensive processes to periods of otherwise low usage).

By increasing load factor, you will reduce the impact of monthly demand (kW) charges on your bill.

Another way of looking at load factor is:

LF = average demand / peak demand

for a given period of time.

Load factor is the total energy consumed in a period (kWh) over maximum power that can be delivered(kW) in to no of hours (h) in that period.

Load factor = Energy consumed (kWh)/ max power (kW) x No. of hours (h)

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Meaning it's a capacitive load. Leading power factor

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Power factor is determined by the nature (resistive, inductive, capacitive) of a load, not whether it is a low load or a high load.

If the load is resistive-inductive, then it will have a lagging power factor; if it is resistive-capacitive, then it will have a leading power factor. Power factor is defined as the angle by which the load current lags or leads the supply voltage.

it is the ratio of buckling load to applied load

That's not possible. The power factor is related to the phase difference between voltage and current on the line. "No load" means 'no current', so power factor is meaningless with no load. If you see a power factor, there must be a load, even if it's some device that you're not aware of.

In order to get an unity power factor, the capacitive load and inductive load must be equal.

load factor is the ratio of average load to max demand for a given period.High load factor meansless cost per KWHmore efficient use of power plant

For an inductive load, the current lags the voltage by 90 degs. Hence the power factor for an inductive load is 0. For a capacitive load, the current leads the voltage by 90 degs. Hence the power factor for a capacitive load is 0. For a resistive load, the current and the voltage are in phase. Hence the power factor for a resistive load is 1.

A power factor of one means that the current and voltage waveforms across the load are in phase. This happens only when the load is pure resistance.

Factored loads are inflated loads. Each type of load has a specific safety factor (load factor) added. Un-factored loads are not inflated.

If you are asking whether power-factor improvement has any effect on a wattmeter reading, then the answer is no, it doesn't. Improving the power factor of a load has absolutely no effect on the power of the load, but it can act to reduce the value of the load current.

A factored load is the product of a nominal load and a load factor. It is the ratio of the lift of an aircraft to its weight and the nominal aphasia.

Divide Power Load by "Power Factor"

A power factor of unity indicates that the load current is in phase with the supply voltage, so is supplying a purely resistive load.


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