Automatic Power Factor Control Panels
What Is an APFC Panel?
APFC Panel is a type of panel that uses capacitor banks and an automatic power factor controller relay to monitor and improve power factor by switching capacitor stages in or out as needed.
Key Features of an APFC Panel
| Feature | Description |
|---|---|
| Voltage Rating | 415V AC, 3-phase, 50/60Hz |
| Power Factor Range | Target value usually around 0.95–0.99 lagging |
| Capacitor Banks | Steps of fixed/rated capacitors (kVAR) |
| Controller | Digital Power Factor Controller (8–16 steps common) |
| Protection | Overload, short-circuit, over-voltage, under-voltage, capacitor failure, etc. |
| Indication | Digital meters for kW, kVAR, PF, volt, amp, frequency |
| Enclosure | Powder-coated steel, IP42/IP54/IP65 depending on installation type |
| Cooling | Natural or forced air ventilation depending on size and rating |
| Compliance | IS 13585-1, IEC 60831, or other national standards |
Main Components of an APFC Panel
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Power Factor Controller Relay
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Capacitor Banks
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Contactors or Thyristor Switches (for switching capacitor banks)
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MCBs/MCCBs (Protection)
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Current Transformers (CTs) – for sensing load current
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APFC Relay Display Unit – to show real-time PF and control logic
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Busbars and Wiring
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Cooling Fans or Vents
Applications of APFC Panels
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Industrial plants with heavy inductive loads (motors, compressors)
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Commercial complexes
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Shopping malls
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Hospitals
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Manufacturing units
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Water treatment plants
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Data centers
Benefits of Using an APFC Panel
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Reduces electricity bills by avoiding power factor penalties
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Improves voltage stability and power quality
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Increases capacity of the system by reducing kVA demand
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Minimizes losses in electrical network
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Enhances equipment lifespan
