power factor
Let an agent handle power factor by definition, measurement, causes, correction and billing, with electrical safety in mind.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle power factor by definition, measurement, causes, correction and billing, with electrical safety in mind.
In AC electrical systems, the ratio of real power (watts) to apparent power (volt-amperes), between 0 and 1, indicating how effectively current is converted into useful work; low power factor increases losses and may incur utility charges.
What it is for: Efficient use of electrical supply.
It can be calculate power factor; identify causes of low power factor; plan power factor correction; understand reactive power charges.
Distinguishing features
Ratio of real to apparent power
Leading or lagging
Affected by inductive loads and harmonics
Correctable
What it looks like
Not visible; shown on meters and analysers.
Physical character
range: 0-1 - dimensionless
How it is recognised
Values such as 0.85 lagging
Leading or lagging
Efficiency is a different measure
Related models
is a kind of - category
relates - quantities
is corrected by - equipment
is related to - quantity
In practice
Families and kinds
displacement power factor
distortion power factor
true power factor
power factor correction
Standards and regulation
IEC 61000 harmonics standards
Utility tariffs on reactive power
Ecodesign rules for power supplies
Failure modes and hazards
Over-correction causing resonance
Electrical hazards when installing capacitors
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Value Calculation.
Definitions matter.
Calculate
Ratio.
Calculate
Calculation.
- What is the power factor from these real and apparent power values? measurement
- Is it leading or lagging? definition
Measure
Instruments.
Measure
Measurement.
- Which instrument measures true power factor? provenance
- Are harmonics included? boundary
Causes Low power factor.
Loads affect it.
Loads
Inductive loads.
Loads
Load types.
- Which loads cause low power factor here, such as motors? definition
- Do electronics add harmonics? boundary
Costs
Billing.
Costs
Reactive power charges.
- Does the utility charge for reactive power or low power factor? provenance
- How much? measurement
Correction Improving it.
Correction must be designed.
Methods
Capacitors and filters.
Methods
Correction methods.
- Which correction method suits this installation? action
- What target power factor is sensible? measurement
Risks
Resonance.
Risks
Correction risks.
- Could correction cause resonance with harmonics? boundary
- Should a qualified engineer design it? action
Safety Electrical work.
Electricity is dangerous.
Work
Qualified people.
Work
Electrical work.
- Must this work be done by a qualified electrician? provenance
- Which regulations apply? provenance
Teaching
Learning.
Teaching
Teaching.
- How can the power triangle be explained? action
- Which analogy helps? action
What the second pass must settle
- Should distortion power factor be a separate entry?
- How should tariffs be linked?
- How should harmonics be linked?