# Power Factor Correction Capacitors Sizing Calculations – Part Fourteen

Today, we will explain the most (4) famous power factor correction capacitor calculators.

 Power Factor Correction Capacitors Calculators

 The most (4) famous power factor correction capacitor calculators are as follows: Arteche Reactive Power and Harmonic Resonance Point Calculator, Eaton Power Factor Correction Calculator, AccuSine Sizing Spreadsheet, Square-D (Schneider Electric) Calculator.   and Finally our exclusive spreadsheet:       5. calculation of the need for power factor correction & sizing calculations

 First: Arteche Reactive Power and Harmonic Resonance Point Calculator

 This calculator includes (4) parts as follows: Data Entry Part, Results Part, Power Triangle Part, Frequency Scan Part.

 1-      Data Entry Part     1- ENTER Transformer Data: use the value by moving the following sliding bars: Rating in KVA V primary in Volts V secondary in Volts Impedance in % Frequency in HZ   2- ENTER Load Data: use the value by moving the following sliding bars: System load in KW Initial Power Factor Target Power Factor

 2-      Results Part     After you enter the data in Data Entry Part, the results are shown as follows: Active Power (P)=                   KW Total Power (S1) (without Capacitors) =        KVA Reactive Power (Q1) (without Capacitors) =              KVAR Load Current (without Capacitors) =              Amps Required kVAR = Total Power (S2) (with Capacitors) = KVA Reactive Power (Q2) (with Capacitors) =                   KVAR Load Current (with Capacitors) =                   Amps Savings = Voltage Boost =

 3-      Power Triangle Part     It shows the total, active and reactive power values on power triangle after and before PF correction based on the entered data.

 4-      Frequency Scan Part     It shows the curve representing relation between the impedance response % and harmonic number and estimate the harmonic order based on the entered data.

 To get your copy from Arteche Reactive Power and Harmonic Resonance Point Calculator, please click the link.

 Second: Eaton Power Factor Correction Calculator

 This professional calculator is available to use only online. It includes (2) main screens as follows: The first main screen, The second main screen.

 The First Main Screen The first main screen is an Introduction for the calculator which explains the function of the calculator and how does it works?     Function of the calculator Are you interested in learning more about the possibility of lowering your facilities' monthly utility bill? Eaton's electrical products for Power Factor Correction and Harmonic Mitigation correct poor Power Factor By entering the utility data for your facility, the Eaton Power Factor Correction Calculator helps you to determine how a higher Power Factor may reduce your monthly utility bill.   How Does It Work? To calculate Power Factor Correction for your facility, the calculator performs two main functions: Determines the capacitor size required to reach your desired Power Factor (PF) level. Based on the required capacitance, a determination is made on voltage rise, harmonic resonance, and breaker size required for installation. Estimates the potential return on investment (ROD' you can achieve by installing the recommended capacitors, including the estimated timeline required for Payback. Important note: There are many considerations when installing capacitors banks. This calculator provides a general idea of how adding capacitance to your facility can help reduce or eliminate utility Power Factor charges. Harmonics and other Power Quality concerns should be considered before installing capacitor equipment.

 The Second Main Screen     Click “Get Started” button on the main screen, a new screen appears which asks you to select the location of the capacitance in your plant distribution system from (2) available locations: At the Load: Direct Connection At the Service Feeder: Bus Connection

Case#1: selection of “At the Load: Direct Connection”

Step#1

Please select from the three drop-down selections below:
1. Type of Motor
2. Induction Motor HP range
3. Number of poles & nominal motor speed (RPM)

The above three drop-down menus will give the following selections for each type of motor:
Used for high efficiency motors and older design (Pre”T-frame”):
 HP range 3 5 7.5 10 15 20 25 30 40 50 60 75 100 123 150 200 250 300 350 400 450 500 No Number of poles & nominal motor speed (RPM) 2 – 3600 RPM 4 – 1800 RPM 6 – 1200 RPM 8 – 900 RPM 10 – 720 RPM 12 – 600 RPM

`-T-Frame' NEMA 'Design B' Motors 1:
 HP range 2 3 5 7.5 10 15 20 25 30 40 50 60 75 100 123 150 200 250 300 350 400 450 500 Number of poles & nominal motor speed (RPM) 2 – 3600 RPM 4 – 1800 RPM 6 – 1200 RPM 8 – 900 RPM 10 – 720 RPM 12 – 600 RPM

NEMA design C:
 HP range 15 20 25 30 40 50 60 75 100 123 150 200 250 300 nominal motor speed (RPM) 1800 RPM 1200 RPM 900 RPM

NEMA design D:
 HP range 15 20 25 30 40 50 60 75 100 123 150 200 250 300

Wound Rotor Motors:
 HP range 15 20 25 30 40 50 60 75 100 123 150 200 250 300

Induction Motor:
 HP range 3 5 7.5 10 15 20 25 30 40 50 60 75 100 123 150 200 250 300 350 400 450 500

 Number of poles & nominal motor speed (RPM) 2 – 3600 RPM 4 – 1800 RPM 6 – 1200 RPM 8 – 900 RPM 10 – 720 RPM 12 – 600 RPM

Step#2

after you make complete selections from step#1 for your design case, click “Calculate Capacitance” button it will give you the following data for the direct connect capacitance:
1. Amount of KVAR
2. Eaton’s Part number
Note:
The Eaton’s capacitor part number is based on across the line motor starting. For VFD applications, the capacitors shall be filtered. For soft starters and other types of applications, please consult Eaton.
This screen also gives you (3) options:
1. Find out more about bus connection
2. Calculate another motor
3. Contact for pricing
Also, you have another button “Start Over” to start a new calculation. You can also send an e-mail to a power quality expert by clicking the “Ask Eaton a Question?” button at any time.

Case#2: selection of “At the Service Feeder: Bus Connection”

Step#1: Calculate required capacitance, voltage rise, harmonics resonance, and circuit breaker size.

Select from drop-down menus for the following data:
• Select the system voltage value from the following selections:
 System Voltage 208 V 220 V 240 V 380 V 415 V 460 V 480 V 550 V 575 V 600 V

• Select the unit of existing load of the facility from the following selections:
 Unit Of Facility Load KW KVA Amps

• Select the unit of current PF level & the desired PF level from the following selections:
 Unit Of Current PF Level & The Desired PF Level Kvars PF

• Then, enter the following data:
1. The existing load of the facility,
2. The current PF level,
3. The desired PF level,
4. And finally, your transformer impedance and size information.

Note:
• If you are unsure of the steps used to obtain any of the values required by the calculator. Eaton will conduct free site evaluation to assist you. You can also send an e-mail to a power quality expert by clicking the “Ask Eaton a Question?” button at any time.
• Now you can click the “Calculate Step 1” button to go to Calculate step#1 screen or click “Start Over” button to start a new calculation.

Calculate step#1 Results screen

The results of your initial calculation are shown in this screen as follows:
1. Max. % bus volt rise (at no load)
2. Parallel resonance at the calculated capacitor sizing
3. Breaker Size in Amps
4. Capacitor Sizing (for exact correction) and for (closest common size)
5. It gives also a Harmonics Alert to check harmonics or not.
If you click the button “Click to See Resonance at Each Step” a new screen named  “Resonance at Each Step “ will open which shows:

After reviewing this screen “Resonance at Each Step” you can click the “Close and Return” button

After reviewing the results, use the links below to:
1. Send an e-mail to a power quality expert by clicking the “Ask Eaton a Question?” button.
2. Start a new calculation by clicking “Start Over” button.
3. Update the original information you entered by clicking “Update Step 1 Info” button,
4. Or begin the next step by clicking “Begin Step 2” button.

 Step#2-B: entering the data based on your selection of utility rate structure If you click “Calculate Step 2” button, a new screen will open, then enter the data required by each type of utility rate structure.   After entering the data, use the links below to: Send an e-mail to a power quality expert by clicking the “Ask Eaton a Question?” button. Update the original information you entered in step#1 by clicking “Return to Step 1” button, Learn more about selecting your utility rate structure by clicking “How Do I Choose?” button Or calculate step#2 by clicking “Calculate Step 2” button.

Step#2-C: ROI Results

The results from your calculations are shown in this screen as follows:
 Installed cost Annual savings Payback in months Fixed Cap and Breaker Switched Cap and Breaker Fixed Harmonic Filter and Breaker Switched Harmonic Filter and Breaker

After reviewing the results of this screen, use the links below to:
1. Send an e-mail to a power quality expert by clicking the “Ask Eaton a Question?” button.
2. Update the original information you entered in step#1 by clicking “Return to Step 1” button,
3. Update the original information you entered in step#2 by clicking “Return to Step 2” button,
4. Or start a new calculation by clicking “Start Over” button.

 You can use the Eaton power factor correction calculator online from the following link:

 Third: AccuSine Sizing Spreadsheet Forth: Square-D (Schneider Electric) Calculator

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 Square-D (Schneider Electric) Calculator
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For the third and fourth calculators, you can review our article “

 5- Need for Power Factor Correction & Sizing Calculations

 This spreadsheet is used to determine the need for power factor correction capacitors for existing installation by determination of the approximate savings possible through power factor penalty reduction and loss reduction. Then the savings are compared with the probable cost of capacitors to determine if it is economical. it calculates also the KVAR rating required for power factor correction. To download your copy of this spreadsheet, please go to article “

In the next article, we will explain how to choose protective devices and cables for Power Factor Correction Capacitors Calculators. Please, keep following.

The previous and related articles are listed in below table:

 Subject Of Previous Article Article Glossary of Power Factor Correction Capacitors Types of Loads, The Power Triangle, What is a power factor? Types of power factor Why utilities charge a power factor penalty? Billing Structure. What causes low power factor? Bad impacts of low power factor, Benefits of Power Factor correction. How to make Power Factor Correction? Types of Power Factor Correction Capacitors Individual compensation Group compensation, Central compensation, Hybrid compensation. Summary for Power Factor Correction Capacitors Sizing Calculations Steps Step#1: Collect Monthly Billing Data Step#2: Make Some Preliminary Measurements For Current And Voltage Step#3: Fill the Economic Screening Worksheet Step#4: Make Preliminary Measurements For Harmonics Step#5: Repeat the Economic Screening Worksheet Step#6: Compare the Savings with the Probable Cost of Capacitors' Installation Second: Design Phase Step#1: Performing a Detailed Plant Survey Step#1.A: Review the one line diagram Step#1.B: Take into consideration the loads that produce harmonics Step#1.C: collect sufficient data Inventory by using measuring instruments Step#2: Select Economical Capacitor Scheme Step#3: Checking the "No Load" Voltage Rise Step#4: Select Capacitor Switching Options Step#5: Check the Harmonic Distortion and make Harmonic Mitigation Options Step#6: Use the Economic Screening Worksheet again Power Factor Correction Capacitors Sizing Calculations Steps For New Designs Factors Affecting The Rated KVAR For a Capacitor Calculation of the Capacitor KVAR Rating for Compensation at: 1-Transformer 2-Individual Motors 3- Calculation Of The Capacitor KVAR Rating For Buildings And Power Plants(Group Compensation) Harmonics Effects On Power Factor Capacitors Harmonic Limits in Electric Power Systems (IEEE 519-2014) Options to Reduce Harmonics for PFCC Power Factor Compensation In Case Of Harmonics

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