## How does PFC controller work?

The PFC works by inducing a current in the inductor (L1, See Figure 1 above) and causing the current to track the input voltage. The control circuit senses both the input voltage and the current flowing through the circuit. The higher frequency allows for a small inductor to be used.

**What is the PFC circuit used for?**

A power factor correction (PFC) circuit is added to a power supply circuit to bring its power factor close to 1.0 or reduce harmonics.

**Why is PFC required for SMPS?**

The addition of the PFC represents another switching stage in the system, meaning that larger amount of high frequency noise is applied to the mains than with a conventional rectifier/capacitor front end, and so additional RFI filtering is required.

### What is detuned power factor correction?

When a properly-specified ‘Detuned’ Power Factor Correction system is installed on a network subject to significant levels of Harmonic Distortion, the levels of distortion are reduced. The amount of reduction varies according to the particular characteristics of each system.

**What is power factor correction formula?**

Power Factor Correction kVAr = Power kW (TanΦi – TanΦd) Φi = Cos-1 Initial Power Factor Pf. Φd = Cos-1 Required Power Factor Pf. Step 3 – Calculate Actual Power Factor Correction [kAVrl. Actual Power Factor Correction Pf = Cos (Tan-1 (TanΦi – Correction kVAr/Power kW ))

**Is PFC required?**

Power factor basics: Power quality is essential for efficient equipment operation, and power factor contributes to this. The power triangle: Poor power factor (for example, less than 95%) results in more current being required for the same amount of work.

#### What is difference between tuned and detuned reactor?

Tuning frequency is usually indicated by an indirect factor like P, and is generally expressed as a percentage of capacitance say 5.67%, 6% ,7% or 14%. If a detuned reactor is defined as 7%, it means that the reactance is 7% of the capacitor reactance at the fundamental frequency.

**What is tuned and detuned reactor?**

Single-tuned filter and the detuned reactor is the type of harmonic filter that commonly used to mitigate harmonic distortion. The harmonic filter also has benefit to improve power factor and voltage profile on the system.

**What is KVA formula?**

Use the formula: P(KVA) = VA/1000 where P(KVA) is power in KVA, V is voltage and A is current in amperes. For example, if V is 120 volts and A is 10 amperes, P(KVA) = VA/1000 = (120)(10)/1000 = 1.2 KVA. For example, if V is 120 volts and R is 50 ohms, P(KVA) = V^2/R/1000 = (14400/50)/1000 = 288/1000 = 0.288 KVA.

## What are Kvars?

While KVAR means Kilovolt-Ampere Reactive, kVA stands for Kilovolt amperes. For the most part, it is commonly referred to as Kilowatt or kW, which is the general term. It’s the unit measurement used to rate most—if not all—of the electrical items you have at home. That’s the KVA calculation.

**How do you select a power factor correction capacitor?**

Use motor data supplied by motor manufacturer, when full load power factor and full load amps are known. First, multiply full load amps times voltage times S3 and divide by 1000. This result is KVA. Next, multiply the KVA times the power factor.

**What is the meaning of 7% detuned reactor?**

If a detuned reactor is defined as 7%, it means that the reactance is 7% of the capacitor reactance at the fundamental frequency.

### What type of capacitor panels does Epcos offer for power factor correction?

EPCOS offers wide range of automatic switched capacitor panels for Power Factor correction in various configurations for a wide range of applications. The Panels are both Contactor switched and Thyristor switched type.

**Why Epcos reactive power compensation systems?**

The panels are designed for indoor as well outdoo installations with various degrees of ingress protection. Depending upon the application and configuration various values of damping reactors are provided to enhance the performance EPCOS offers turnkey solutions for station type Reactive Power Compensation Systems.

**What does Epcos stand for?**

EPCOS consistently stands for superlative electronic performance. Deekay Electricals is proud to be an authorized channel partner for EPCOS. We deal with the complete range of EPCOS capacitors and APFC Panels.