what does ability mean?
DESCRIPTION
What does ability mean?. Ability is the rate of time for the transformation of energy into mechanical energy or light energy. ACTIVE & REACTIVE POWERS. Most plant loads are Inductive and require a magnetic field to operate: Motors Transformers Florescent lighting - PowerPoint PPT PresentationTRANSCRIPT
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Power Quality Correction
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What does ability mean?What does ability mean?
Ability is the rate of time for the Ability is the rate of time for the transformation of energy into transformation of energy into mechanical energy or light mechanical energy or light energyenergy
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Most plant loads are Most plant loads are InductiveInductive and require a and require a magnetic magnetic fieldfield to operate: to operate:
MotorsMotors TransformersTransformers Florescent lightingFlorescent lighting
The magnetic field is necessary.The magnetic field is necessary. The utility must supply the power to produce the The utility must supply the power to produce the
magnetic field magnetic field andand the power to produce the useful work. the power to produce the useful work. These two types of current are the These two types of current are the ACTIVEACTIVE and and
REACTIVEREACTIVE components components
ACTIVE & REACTIVE POWERSACTIVE & REACTIVE POWERS
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Power Factor Power Factor FundamentalsFundamentals
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Power Factor Fundamental
• Definitions:
– Working /Active Power: Normally measured in kilowatts (kW). It does the "work" for the system--providing the motion, torque, heat, or whatever else is
required.
– Reactive Power: Normally measured in kilovolt-amperes-reactive (kVAR), doesn't
do useful "work." It simply sustains the electromagnetic field.
– Apparent Power:
Normally measured in kilovolt-amperes (kVA). Working Power and Reactive Power together make up apparent power.
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Power Factor: A measure of efficiency. The ratio of Active Power (output) to Total Power (input)
A power factor reading close to 1.0 means that electrical power is being utilized effectively, while a low power factor indicates poor utilization of electrical power.
Total Power (kVA)
Active Power (kW)Power Factor = Active (Real) Power
Total Power= kW
kVA
= Cosine (θ) = DISPLACEMENT POWER FACTOR
ReactivePower(KVAR)
Power Factor Fundamental
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In this example, demand In this example, demand was reduced to 8250 kVA was reduced to 8250 kVA from 10000 kVA.from 10000 kVA.
1750KVA Transformer 1750KVA Transformer Capacity Release.Capacity Release.
The power factor was The power factor was improved from 80% to 97%improved from 80% to 97%
Before After
Why do we install Capacitors?Why do we install Capacitors?