Automatic APFC, capacitor bank and detuned power factor correction panels for industrial and commercial electrical systems
E-Tech Power manufactures Power Factor Correction Panels (PFC Panels) and Automatic Power Factor Correction (APFC) Panels for industrial, commercial and infrastructure applications.
Our power factor correction solutions are designed to compensate for reactive power and help improve the power factor of electrical systems. Depending on the application, the system can use capacitor banks, APFC relays, contactor switching, thyristor switching, detuned reactors and associated protection equipment.
A properly designed power factor correction system can help improve electrical system utilization, reduce unnecessary reactive current and, where applicable, minimize power-factor-related utility charges or penalties.
The required capacitor capacity is not the same for every installation. It should be selected after considering the existing power factor, target power factor, connected load, load variation, harmonics and utility requirements.
E-Tech Power provides customized solutions for customers across Delhi NCR, Noida, Greater Noida, Ghaziabad, Faridabad and Gurugram.
What Is a Power Factor Correction Panel?
A Power Factor Correction Panel is an electrical panel that uses capacitors or other reactive-power compensation equipment to improve the power factor of an electrical installation.
Industrial equipment such as motors, transformers and inductive loads consume both:
- Active power (kW)
- Reactive power (kVAR)
The useful work is associated primarily with active power, while reactive power is required to establish magnetic fields in inductive equipment.
A power factor correction system supplies part of the required reactive power locally, reducing the amount that needs to be supplied through the upstream electrical network.
In simple terms:
Low Power Factor → Higher Reactive Current → Higher System Current
Power Factor Correction → Reactive Power Compensation → Improved Power Factor
The actual improvement depends on the load characteristics and correctly selected capacitor capacity.
What Is Power Factor?
Power factor indicates the relationship between real power (kW) and apparent power (kVA) in an AC electrical system.
For a simplified system:
Power Factor = kW / kVA
For example, if an installation consumes:
100 kW
at:
125 kVA
then:
Power Factor = 100 / 125 = 0.80
This means the installation is operating at a power factor of approximately 0.80.
A lower power factor generally means more current is required to deliver the same amount of useful real power.
Why Does Low Power Factor Matter?
Low power factor can increase the current flowing through the electrical distribution system for a given real-power demand.
This can contribute to:
- Higher electrical losses
- Greater loading of transformers
- Higher current in cables and switchgear
- Reduced system capacity
- Increased voltage drop in some installations
- Power-factor-related utility charges where applicable
Improving power factor can therefore help an industrial electrical system make better use of its available electrical capacity.
However, the financial benefit depends on the utility tariff, operating profile and existing system conditions.
How Does an APFC Panel Work?
An Automatic Power Factor Correction Panel automatically switches capacitor stages according to the reactive power requirement of the electrical system.
A typical operating sequence is:
Electrical Load
↓
Power Factor Measurement
↓
APFC Relay
↓
Required Capacitor Stage Selected
↓
Capacitor Bank Connected
↓
Power Factor Improves
As the load changes, the APFC relay can connect or disconnect capacitor stages to maintain the desired operating range.
This allows the capacitor bank to respond to changing reactive-power demand rather than keeping the entire capacitor bank permanently connected.
What Is an APFC Panel?
APFC stands for Automatic Power Factor Correction.
An APFC panel generally consists of a capacitor bank divided into multiple stages, along with a controller that measures the electrical system and operates the required stages.
For example, a capacitor bank could be divided into stages such as:
10 + 10 + 20 + 20 + 40 kVAR
The actual stage arrangement should be selected according to the load profile.
When reactive demand increases, additional stages can be switched ON.
When reactive demand decreases, unnecessary stages can be switched OFF.
This provides automatic reactive-power compensation.
How to Calculate Required APFC Capacity?
The required capacitor capacity depends on the existing power factor, desired target power factor and real power load.
A commonly used calculation is:
Required kVAR = kW × (tan φ₁ − tan φ₂)
Where:
- kW = Real power load
- φ₁ = Angle corresponding to existing power factor
- φ₂ = Angle corresponding to target power factor
Example
Suppose an industrial load is:
500 kW
Existing power factor:
0.75
Desired power factor:
0.95
The required capacitor capacity can be calculated from the difference in the reactive-power components corresponding to the two power factors.
The final APFC size should not be selected from this calculation alone. Actual load variation, harmonics, transformer loading, utility requirements and operating conditions should also be considered.
For a project-specific kVAR recommendation, provide your existing kW/kVA, current power factor and load profile.
Types of Power Factor Correction Panels
Automatic Power Factor Correction Panel
APFC panels automatically switch capacitor stages according to the measured reactive-power requirement.
Suitable for installations where load conditions change during operation.
Capacitor Bank Panel
A capacitor bank panel provides reactive-power compensation through a defined capacitor arrangement.
It can be configured for fixed or staged compensation depending on the application.
Detuned APFC Panel
A detuned APFC panel combines capacitor banks with reactors designed to reduce the risk of undesirable resonance conditions in systems containing harmonic-producing loads.
It is particularly worth considering where the installation contains significant:
- VFDs
- UPS systems
- Rectifiers
- SMPS loads
- Welding equipment
- Power electronic equipment
Thyristor Switched APFC Panel
Thyristor-switched systems can provide very fast capacitor-stage switching.
They can be considered for installations where the load changes rapidly and conventional contactor switching may not provide the desired response.
Intelligent / Advanced APFC Panel
Where required, advanced monitoring and automation functions can be integrated into the APFC system.
Possible features include:
- Digital measurement
- Alarm indication
- Communication
- Data logging
- Remote monitoring
- PLC integration
These features should be selected according to the actual project requirement.
Contactor Switched vs Thyristor Switched APFC
The appropriate switching technology depends mainly on how quickly the load changes.
| Feature | Contactor APFC | Thyristor APFC |
|---|---|---|
| Switching speed | Conventional | Very fast |
| Best suited for | Relatively stable/changing industrial loads | Rapidly changing loads |
| Mechanical switching | Yes | No mechanical contactor for stage switching |
| Response | Normal | Fast |
| Cost | Generally lower | Generally higher |
| Application | General industrial use | Dynamic load applications |
A technical evaluation should be carried out before selecting the switching method.
When Do You Need a Detuned APFC Panel?
A detuned APFC panel should be considered when the electrical system contains significant harmonic-producing equipment.
Common sources include:
- Variable Frequency Drives
- UPS systems
- Rectifiers
- Inverters
- Welding machines
- Switching power supplies
- Other nonlinear loads
Capacitors and system inductance can interact under certain conditions and create resonance concerns.
A detuned configuration uses reactors with the capacitor bank to modify the system response and help reduce the risk associated with harmonic resonance.
Important:
A detuned reactor is not the same as a complete harmonic filter.
If harmonic levels are significant, the system should be evaluated before selecting the appropriate compensation and harmonic-mitigation method.
Main Components of an APFC Panel
A typical APFC panel may include:
- APFC relay/controller
- Power capacitors
- Capacitor-duty contactors
- Thyristor modules, where applicable
- MCCB
- MCB
- Detuned reactors
- Busbars
- CTs
- Digital multifunction meter
- Indication lamps
- Control relays
- Cooling fans
- Temperature monitoring
- Surge protection where required
- Control wiring
- Terminal blocks
The exact components depend on the required kVAR capacity, switching method and electrical system.
APFC Panel Protection
A properly engineered APFC panel should include suitable protection and control arrangements for the installed equipment.
Depending on the design, this may include:
- Short-circuit protection
- Over-current protection
- Capacitor protection
- Over-temperature protection
- Voltage monitoring
- Current monitoring
- Phase-failure protection
- Reactor/capacitor protection
- Fuse protection where required
Protection selection should be based on the manufacturer’s component specifications and the electrical system design.
APFC Panel Applications
Power factor correction panels are commonly used in installations containing inductive electrical loads.
Manufacturing Plants
For motors, production machinery, compressors, pumps and other industrial loads.
Textile Industries
For motors, drives, spinning and processing equipment.
Steel & Engineering Industries
For motors, welding equipment and industrial machinery.
Automobile Industries
For production machinery, compressors, pumps and other plant utilities.
Commercial Buildings
For HVAC, pumps, lifts and other electrical loads.
Hospitals & Institutions
For building services and other suitable electrical systems.
Water Treatment Plants
For pumps, blowers and motor-driven equipment.
Infrastructure Projects
For electrical distribution systems with suitable reactive-power compensation requirements.
APFC Panel for Industrial Motors
Motors are one of the most common inductive loads in industrial installations.
A motor operating at a lower power factor can draw higher current for the same useful kW output.
An appropriately sized APFC system can compensate part of the reactive demand and improve the overall power factor of the electrical installation.
Typical applications include:
- Pumps
- Compressors
- Fans
- Blowers
- Conveyors
- Machine tools
- HVAC equipment
APFC Panel for VFD-Based Systems
VFDs improve motor control and energy management but also introduce nonlinear electrical characteristics that should be considered when designing a capacitor-based power factor correction system.
For VFD-heavy installations, the APFC design should consider:
- Harmonic distortion
- Capacitor suitability
- Resonance
- Detuning
- Load profile
- Existing correction equipment
A detuned or other harmonic-aware configuration may be more appropriate than a conventional capacitor bank in certain installations.
APFC Panel Technical Specifications
Final specifications should always be customized according to the project.
| Parameter | Typical Configuration |
|---|---|
| Panel Type | APFC / Detuned APFC / Thyristor APFC |
| System | Three Phase |
| Voltage | As per project |
| Frequency | As per project |
| Capacity | Customized kVAR |
| Switching | Contactor / Thyristor |
| Capacitor Bank | Multi-stage |
| APFC Relay | As specified |
| Reactor | Optional / Detuned |
| Incomer | MCCB / As specified |
| Metering | Digital / Multifunction |
| Cooling | Natural / Forced |
| Enclosure | Floor Mounted / Customized |
| Protection | As required |
| Communication | Optional |
| PLC Integration | Optional |
| HMI | Optional |
How to Select the Right APFC Panel?
Before selecting an APFC panel, collect the following information.
Existing Power Factor
Check the average and minimum power factor under normal operation.
Real Power Load
Provide the typical and maximum kW demand.
Maximum Demand
Peak demand is important when determining the compensation requirement.
Load Profile
Determine whether the load is:
- Stable
- Variable
- Rapidly changing
Harmonic Environment
Check whether the system contains:
- VFDs
- UPS
- Rectifiers
- Welding equipment
- Other nonlinear loads
Transformer Capacity
Transformer rating and loading should be considered during system design.
Utility Requirement
Check the power factor target and applicable tariff/penalty structure of the electricity provider.
APFC Panel Manufacturing Process
Requirement Analysis
We review the electrical load, existing power factor, required kVAR and application.
System Design
The capacitor stage arrangement, switching method and protection requirements are developed.
Component Selection
Capacitors, switching devices, controllers, reactors and protection components are selected according to the approved design.
Panel Fabrication
The enclosure is fabricated according to the required dimensions and mounting arrangement.
Assembly & Wiring
Power and control components are assembled and wired according to the approved electrical design.
Inspection & Testing
Testing may include:
- Visual inspection
- Wiring verification
- Continuity checks
- Insulation checks where applicable
- APFC control verification
- Capacitor-stage switching verification
- Indication testing
- Interlock verification
- Protection/control checks
Testing requirements depend on the project specification and applicable standards.
Power Factor Correction Panel Price
There is no single fixed price for a Power Factor Correction Panel.
The cost depends on:
- Required kVAR capacity
- Number of capacitor stages
- Capacitor make
- APFC relay
- Contactor or thyristor switching
- Detuned reactors
- Harmonic requirements
- MCCB rating
- Busbar capacity
- Metering
- Enclosure size
- Cooling arrangement
- Automation
- Quantity
Get an Accurate APFC Panel Quotation
For a project-specific quotation, send:
Load in kW/kVA + Existing Power Factor + Target Power Factor + Voltage + Quantity
If available, also share:
Electricity bill + SLD + Load Schedule + APFC requirement
This allows the required compensation capacity to be evaluated more accurately.
Power Factor Correction Panel Manufacturer in Delhi NCR
E-Tech Power manufactures customized Power Factor Correction and APFC Panels for industrial and commercial electrical applications across Delhi NCR.
Our service areas include:
Delhi | Noida | Greater Noida | Ghaziabad | Faridabad | Gurugram
For project requirements outside these locations, contact our team to confirm service availability.
APFC Panel Manufacturer in Noida
E-Tech Power provides customized APFC and capacitor bank solutions for industrial and commercial installations in Noida.
The panel can be designed according to the required kVAR capacity, load variation, switching method and harmonic environment.
APFC Panel Manufacturer in Greater Noida
For manufacturing units, industrial facilities, warehouses and commercial installations in Greater Noida, customized power factor correction panels can be developed according to project requirements.
APFC Panel Manufacturer in Ghaziabad
We provide customized APFC, capacitor bank and detuned power factor correction solutions for suitable industrial and commercial applications in Ghaziabad and nearby areas.
APFC Panel Manufacturer in Faridabad
E-Tech Power can provide power factor correction solutions for industrial applications in Faridabad based on the customer’s electrical load and power factor requirements.
APFC Panel Manufacturer in Gurugram
For commercial buildings, industrial facilities and infrastructure projects in Gurugram, APFC and customized reactive-power compensation solutions can be designed according to project requirements.
Why Choose E-Tech Power?
Application-Based Design
We consider the actual load, power factor, load variation and electrical environment before selecting the APFC configuration.
Customized kVAR Capacity
Capacitor stages can be arranged according to the required compensation profile.
Harmonic-Aware Solutions
Where harmonic-producing loads are present, detuned or other appropriate solutions can be considered after evaluating the electrical system.
Flexible Switching Options
Contactor-switched and thyristor-switched configurations can be considered according to the load characteristics.
Quality Components
Components can be selected according to customer specification and project requirements.
Testing & Inspection
The completed panel can undergo appropriate functional and electrical checks before dispatch.
Technical Support
- Installation support
- Commissioning
- Troubleshooting
- Maintenance
- Technical consultation
Frequently Asked Questions
What is a Power Factor Correction Panel?
A Power Factor Correction Panel uses capacitors or other reactive-power compensation equipment to improve the power factor of an electrical installation.
What is an APFC Panel?
An APFC panel automatically switches capacitor stages according to the reactive-power requirement of the electrical system.
What is the difference between PFC and APFC?
PFC is the general concept of power factor correction. APFC is an automatic system that controls multiple compensation stages according to changing load conditions.
How is APFC panel capacity calculated?
The required capacitor capacity depends on the real power, existing power factor and target power factor. A commonly used calculation is:
Required kVAR = kW × (tan φ₁ − tan φ₂)
Actual system conditions should also be evaluated before finalizing the panel size.
What is a detuned APFC panel?
A detuned APFC panel combines capacitor banks with reactors to reduce the risk of undesirable resonance in electrical systems containing harmonic-producing loads.
Is APFC suitable for VFD loads?
It can be, but VFD-heavy systems require harmonic and resonance considerations before selecting the capacitor configuration.
Contactor APFC or thyristor APFC—which is better?
Neither is universally better. Contactor switching is suitable for many conventional industrial applications, while thyristor switching is useful where the load changes rapidly and fast compensation is required.
Can APFC reduce electricity bills?
It can help reduce costs associated with poor power factor where the electricity tariff or utility structure applies such charges. Actual savings depend on the existing power factor, load profile and utility tariff.
Can APFC improve transformer capacity utilization?
Improving power factor can reduce reactive current and therefore reduce the total current required for a given real-power load, which can improve utilization of available electrical capacity.
Does APFC remove harmonics?
No. A conventional capacitor-based APFC panel is primarily designed for reactive-power compensation. Harmonic mitigation may require detuned reactors, passive filters, active harmonic filters or another suitable solution.
What information is needed for an APFC quotation?
Provide:
kW/kVA load + existing power factor + target power factor + voltage + load profile + quantity.
An electricity bill or SLD can also be useful.
Can you manufacture customized APFC panels?
Yes. Capacity, stage configuration, switching method, protection, metering, enclosure and automation features can be customized according to the project.
Get a Quote for a Power Factor Correction Panel
Looking for a Power Factor Correction Panel Manufacturer in Delhi NCR?
E-Tech Power can help you select a suitable APFC, capacitor bank or detuned power factor correction solution according to your electrical load and operating conditions.