Allen-Bradley 20A Original Instructions Manual
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Allen-Bradley 20A Original Instructions Manual

Allen-Bradley 20A Original Instructions Manual

Powerflex dynamic braking resistor calculator
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Application Technique
Original Instructions
PowerFlex Dynamic Braking Resistor Calculator
Catalog Numbers 20A, 20B, 20F, 20G, 22A, 22B

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Summary of Contents for Allen-Bradley 20A

  • Page 1 Application Technique Original Instructions PowerFlex Dynamic Braking Resistor Calculator Catalog Numbers 20A, 20B, 20F, 20G, 22A, 22B...
  • Page 2 Important User Information Read this document and the documents listed in the additional resources section about installation, configuration, and operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.

  • Page 3: Table Of Contents

    Table of Contents Preface Waste Electrical and Electronic Equipment ....... . 5 Product Safety .
  • Page 4 Table of Contents Notes: Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017...

  • Page 5: Preface

    The voltage must be zero for all three measurements. DC+ DC- Additional Resources You can view or download publications at http://www.rockwellautomation.com/global/literature-library/overview.page. To place an order for paper copies of technical documentation, contact your local Allen-Bradley distributor or Rockwell Automation® sales representative. Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017...

  • Page 6: Summary Of Changes

    Preface Summary of Changes This manual contains new and updated information as indicated in the following table. Topic Page Added 200…240V AC definitions to Appendix A Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017...

  • Page 7: How Dynamic Braking Works

    Chapter Understanding How Dynamic Braking Works How Dynamic Braking Works When an induction motor’s rotor turns slower than the synchronous speed set by the drive’s output power, the motor is transforming electrical energy obtained from the drive into mechanical energy available at the drive shaft of the motor. This process is referred to as motoring.

  • Page 8: Dynamic Brake Components

    Chapter 1 Understanding How Dynamic Braking Works Dynamic Brake Components A Dynamic Brake consists of a Chopper (the chopper transistor and related control components are built into PowerFlex® drives) and a Dynamic Brake Resistor. Figure 1 shows a simplified Dynamic Braking schematic. Figure 1 - Simplified Dynamic Brake Schematic + DC Bus Voltage...
  • Page 9 Understanding How Dynamic Braking Works Chapter 1 Chopper Transistor Voltage Control regulates the voltage of the DC bus during regeneration. The average values of DC bus voltages are: Drive Input Voltage Transistor Turn-On Maximum Power Calculation Voltage Voltage 375V DC 395V DC 375V DC 395V DC...
  • Page 10 Chapter 1 Understanding How Dynamic Braking Works Notes: Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017...

  • Page 11: How To Determine Dynamic Brake Requirements

    Chapter Determining Dynamic Brake Requirements How to Determine Dynamic When a drive is consistently operating in the regenerative mode of operation, serious consideration should be given to equipment that transforms the electrical Brake Requirements energy back to the fixed frequency utility grid. As a rule, Dynamic Braking can be used when the need to dissipate regenerative energy is on an occasional or periodic basis.
  • Page 12 Chapter 2 Determining Dynamic Brake Requirements • Speed rating from motor nameplate in rpm or rps (radians per second) • Required decel time (per Figure 2, t ). This time is a process – t requirement and must be within the capabilities of the drive programming. •...
  • Page 13 Determining Dynamic Brake Requirements Chapter 2 Figure 2 - Application Speed, Torque, and Power Profiles Speed ω(t) ω b ω o t 2 t 3 t 1 + t 4 Torque T(t) t 2 t 3 t 1 + t 4 Power P(t) t 2 t 3...

  • Page 14: Determine Values Of Equation Variables

    Chapter 2 Determining Dynamic Brake Requirements Determine Values of Step 1 – Total Inertia Equation Variables    = Total inertia reflected to the motor shaft (kg•m or WK in lb•ft = Motor inertia (kg•m or WK in lb•ft = Gear ratio for any gear between motor and load (dimensionless) Load Speed ---------------------------- -...
  • Page 15 Determining Dynamic Brake Requirements Chapter 2 Step 2 – Peak Braking Power        – ------------------------------------------ -   – = Peak braking power (watts) 1.0 Hp = 746 watts = Total inertia reflected to the motor shaft (kg•m 2N ...
  • Page 16 Chapter 2 Determining Dynamic Brake Requirements Record Rated Regenerative Power: For the purposes of this document, it is assumed that the motor used in the application is capable of producing the required regenerative torque and power. Step 3 – Minimum Power Requirements for the Dynamic Brake Resistors It is assumed that the application exhibits a periodic function of acceleration and deceleration.
  • Page 17 Determining Dynamic Brake Requirements Chapter 2 The Average Power in watts regenerated over the period       – ----------------- - ----- - ----------------------- -  Calculate Average Power in watts regenerated over the period   ...
  • Page 18 Chapter 2 Determining Dynamic Brake Requirements minimum dynamic brake resistance table in Appendix A. This will give a data point for a line to be drawn on one the curves provided in Chapter Step 5 – Percent Peak Load of the Internal Dynamic Brake Resistor Skip this calculation if an external dynamic brake resistor will be used.

  • Page 19: Example Calculation

    Determining Dynamic Brake Requirements Chapter 2 Example Calculation A 10 Hp, 4 Pole, 480 Volt motor and drive is accelerating and decelerating as depicted in Figure • Cycle period t4 is 40 seconds • Rated speed is 1785 rpm and is to be decelerated to 0 speed in 15.0 seconds •...

  • Page 20: Chapter 3

    Chapter 2 Determining Dynamic Brake Requirements        – ------------------------------------------ - Peak Braking Power   –     – 0.261 186.92 186.92 0 ----------------------------------------------------- - 607.9 watts Note that this is 8.1% of rated power and is less than the maximum drive limit of 150% current limit.
  • Page 21 Determining Dynamic Brake Requirements Chapter 2  -------- - Percent Average Load  --- - 100% Important: The value of should not exceed 100%. This is the result of the calculation outlined in Step 5. Record this value on page ...
  • Page 22 Chapter 2 Determining Dynamic Brake Requirements Notes: Rockwell Automation Publication PFLEX-AT001L-EN-P - September 2017...

  • Page 23: Evaluating The Capability Of The Internal Dynamic Brake Resistor

    Chapter Evaluating the PowerFlex 7-Class Internal Resistor Evaluating the Capability of To investigate the capabilities of the internal resistor package, the values of (Average Percent Load) and (Peak Percent Load) are plotted onto a graph of the Internal Dynamic Brake the Dynamic Brake Resistor’s constant temperature power curve and connected Resistor with a straight line.
  • Page 24 Chapter 3 Evaluating the PowerFlex 7-Class Internal Resistor 2B. If P is greater than R you will need to extend the cycle time (in cont. seconds) by the result of the following equation.    ----- - Decel  ...
  • Page 25 Evaluating the PowerFlex 7-Class Internal Resistor Chapter 3 If the line connecting lies entirely to the left of the Power Curve, then the capability of the internal resistor is sufficient for the proposed application. Figure 3 - Example of an Acceptable Resistor Power Curve 3000 480V Frame C 2800...

  • Page 26: Powerflex 70 Power Curves

    Chapter 3 Evaluating the PowerFlex 7-Class Internal Resistor PowerFlex 70 Power Curves Figure 4 - PowerFlex 70 – 240 Volt, Frames A and B 3000 240V Frames A & B 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Decel Time (Seconds) Figure 5 - PowerFlex 70 –...
  • Page 27 Evaluating the PowerFlex 7-Class Internal Resistor Chapter 3 Figure 6 - PowerFlex 70 – 240 Volt, Frame D 3000 240V Frame D 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Decel Time (Seconds) Figure 7 - PowerFlex 70 –...
  • Page 28 Chapter 3 Evaluating the PowerFlex 7-Class Internal Resistor Figure 8 - PowerFlex 70 – 480 Volt, Frame C 3000 480V Frame C 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Decel Time (Seconds) Figure 9 - PowerFlex 70 –...
  • Page 29 Evaluating the PowerFlex 7-Class Internal Resistor Chapter 3 Figure 10 - PowerFlex 70 – 600 Volt, Frames A and B 3000 600V Frames A & B 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Decel Time (Seconds) Figure 11 - PowerFlex 70 –...

  • Page 30: Powerflex 700 Power Curves

    Chapter 3 Evaluating the PowerFlex 7-Class Internal Resistor PowerFlex 700 Power Curves Figure 12 - PowerFlex 700 – 240 Volt, Frame 1, 2…5 Hp 3000 240V Frame 1, 2…5 HP 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 Decel Time (Seconds) Figure 13 - PowerFlex 700 –...
  • Page 31 Evaluating the PowerFlex 7-Class Internal Resistor Chapter 3 Figure 14 - PowerFlex 700 – 240 Volt, Frame 2 3000 240V Frame 2 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 Decel Time (Seconds) Figure 15 - PowerFlex 700 – 480 Volt, Frame 0 3000 400V Frame 0 2800...

  • Page 32: How To Evaluate A Powerflex 750-Series Internal Resistor

    Chapter 3 Evaluating the PowerFlex 7-Class Internal Resistor Figure 16 - PowerFlex 700 – 480 Volt, Frame 1 3000 480V Frame 1 2800 2600 2400 2200 2000 1800 1600 1400 1200 1000 Decel Time (Seconds) Figure 17 - PowerFlex 700 – 480 Volt, Frame 2 3000 480V Frame 2 2800...

  • Page 33: How To Select An External Dynamic Brake Resistor For Powerflex 7-Class Drives

    Chapter Selecting An External Resistor for PowerFlex 7-Class Drives How to Select an External In order to select the appropriate External Dynamic Brake Resistor for your application, the following data must be calculated. Dynamic Brake Resistor for PowerFlex 7-Class Drives Peak Regenerative Power (Expressed in watts) This value is used to determine the maximum resistance value of the Dynamic...
  • Page 34 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Protecting External Resistor Packages ATTENTION: PowerFlex drives do not offer protection for externally mounted brake resistors. A risk of fire exists if external braking resistors are not protected. External resistor packages must be self-protected from over temperature or the protective circuit show below, or equivalent, must be supplied.
  • Page 35 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Record the Values Calculated in Section 2 Calculate Maximum Dynamic Brake Resistance Value When using an internal Dynamic Brake Resistor, the value is fixed. However, when choosing an external resistor, the maximum allowable Dynamic Brake resistance value (R ) must be calculated.

  • Page 36: Appendix A

    Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Select Resistor Select a resistor bank from the following tables or from your resistor supplier that has all of the following: • a resistance value that is less than the value calculated (R in ohms) •...
  • Page 37 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 615.00 13302 440-1 PG/IPC 546.00 Ohms 546.00 5634 552-3A PG/IPC 546.00 12050 552-3 PG/IPC 546.00 12050 555-3A PG/IPC 546.00 28000 PR552-3 PowerOhm 546.00 1055 23004 550-3A PG/IPC...
  • Page 38 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 342.00 Ohms 342.00 3677 442-3A PG/IPC 342.00 3677 442-3 PG/IPC 342.00 14397 445-3A PG/IPC 342.00 17500 PR445-3A PowerOhm 342.00 1088 23473 445-3 PG/IPC 342.00 1096 22534 440-3A...
  • Page 39 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 154.00 Ohms 154.00 6416 222-1A PG/IPC 154.00 6416 222-1 PG/IPC 154.00 7800 PR2205-1 PowerOhm 154.00 6416 225-1A PG/IPC 154.00 16431 225-1 PG/IPC 154.00 16431 220-1A PG/IPC 154.00...
  • Page 40 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 117.00 Ohms 117.00 1200 PR117R150W PowerOhm 117.00 6000 PR117R250W PowerOhm 117.00 6000 PRT117R300W PowerOhm 117.00 7950 T117R300W PG/IPC 117.00 6000 PR117R400W PowerOhm 117.00 10100 T117R600W PG/IPC 117.00...
  • Page 41 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 97.00 13800 T97R900W PG/IPC 97.00 34600 PRT97R900W PowerOhm 97.00 1200 16500 T97R1K2 PG/IPC 97.00 1200 34600 PR97R1K20 PowerOhm 97.00 1200 55300 PRT97R1K2 PowerOhm 97.00 1500 20800 T97R1K5...
  • Page 42 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 81.00 Ohms 81.00 6400 PR4405-7A PowerOhm 81.00 28800 PR4405-7 PowerOhm 81.00 1200 46100 PR4410-7 PowerOhm 81.00 1389 34975 442-7A PG/IPC 81.00 1600 72600 PR442-7 PowerOhm 81.00 1837...
  • Page 43 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 80.00 9000 1435900 PRT80R9K0 PowerOhm 80.00 9300 230000 T80R9K3 PG/IPC 80.00 9300 1435900 PRT80R9K3 PowerOhm 77.00 Ohms 77.00 6200 PR77R250W PowerOhm 77.00 6200 PRT77R300W PowerOhm 77.00 8210...
  • Page 44 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 70.00 9600 1249300 PF70R9K60 PowerOhm 70.00 10400 251200 PR550-9 PowerOhm 70.00 12489 482144 550-9 PG/IPC 65.00 Ohms 65.00 9500 PF65R400W PowerOhm 65.00 23600 PF65R800W PowerOhm 65.00 1200...
  • Page 45 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 59.00 1200 52900 PR225-4A PowerOhm 59.00 1576 64161 225-4 PG/IPC 59.00 1577 64161 220-4A PG/IPC 59.00 1600 75600 PR225-4 PowerOhm 59.00 2000 126000 PR220-4 PowerOhm 59.00 2384...
  • Page 46 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 48.00 3000 21100 T48R3K0 PG/IPC 48.00 3000 332400 PRT48R3K0 PowerOhm 48.00 3150 131800 PR48R3K15 PowerOhm 48.00 3600 28000 T48R3K6 PG/IPC 48.00 3600 86200 PF48R3K60 PowerOhm 48.00 3600...
  • Page 47 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 45.00 4050 311600 PR45R4K05 PowerOhm 45.00 4400 504800 PR552-10 PowerOhm 45.00 5138 308128 552-10 PG/IPC 45.00 5850 494300 PR45R5K85 PowerOhm 45.00 6000 125000 T45R6K0 PG/IPC 45.00 6000...
  • Page 48 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 40.00 1800 82100 PR40R1K80 PowerOhm 40.00 1800 109900 PRT40R1K8 PowerOhm 40.00 2000 114700 PF40R2K00 PowerOhm 40.00 3150 177100 PR40R3K15 PowerOhm 40.00 3200 277000 PF40R3K20 PowerOhm 40.00 4000...
  • Page 49 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 34.00 Ohms 34.00 12200 PRT34R300W PowerOhm 34.00 14700 T34R300W PG/IPC 34.00 19100 T34R900W PG/IPC 34.00 72700 PRT34R900W PowerOhm 34.00 1200 72700 PR34R1K20 PowerOhm 34.00 1600 97500 PR34R1K60...
  • Page 50 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 32.00 2400 113100 PF32R2K40 PowerOhm 32.00 2400 221500 PR225-6 PowerOhm 32.00 2700 25200 T32R2K7 PG/IPC 32.00 2700 351700 PRT32R2K7 PowerOhm 32.00 2800 220200 PF32R2K80 PowerOhm 32.00 2906...
  • Page 51 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 28.00 Ohms 28.00 15400 PF28R400W PowerOhm 28.00 35900 PF28R800W PowerOhm 28.00 1200 57300 PF28R1K20 PowerOhm 28.00 1600 76900 PR5505-12A PowerOhm 28.00 1600 77000 PF28R1K60 PowerOhm 28.00 2000...
  • Page 52 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 27.00 15000 931000 T27R15K0 PG/IPC 27.00 21600 1346000 T27R21K6 PG/IPC 27.00 21600 1906900 PRT27R21K6 PowerOhm 27.00 27400 2075000 T27R27K4 PG/IPC 27.00 27400 2833000 PRT27R27K4 PowerOhm 25.00 Ohms 25.00...
  • Page 53 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 24.00 20184 1906300 PR555-13 PowerOhm 24.00 24086 1173670 555-13 PG/IPC 24.00 24468 1871068 550-13A PG/IPC 24.00 24576 2662200 PR550-13A PowerOhm 24.00 31104 3995200 PR550-13 PowerOhm 24.00 36710...
  • Page 54 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 21.00 Ohms 21.00 18900 PF21R400W PowerOhm 21.00 47100 PF21R800W PowerOhm 21.00 1200 57700 PF21R1K20 PowerOhm 21.00 1600 75400 PF21R1K60 PowerOhm 21.00 2000 143600 PF21R2K00 PowerOhm 21.00 2400...
  • Page 55 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 20.00 34600 1148000 T20R34K6 PG/IPC 20.00 34600 4815100 PRT20R34K6 PowerOhm 19.00 Ohms 19.00 17100 PF19R400W PowerOhm 19.00 39000 PF19R800W PowerOhm 19.00 1200 84900 PF19R1K20 PowerOhm 19.00 1200...
  • Page 56 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 18.00 9522 512900 PR18R9K52 PowerOhm 18.00 9522 564100 PR442-12 PowerOhm 18.00 12168 693000 PR18R12K1 PowerOhm 18.00 13810 660558 445-12A PG/IPC 18.00 15138 1480900 PR18R15K1 PowerOhm 18.00 15138...
  • Page 57 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 15.00 11400 1027000 PRT15R11K4 PowerOhm 15.00 12112 550465 552-15A PG/IPC 15.00 12615 1197800 PR552-15A PowerOhm 15.00 15360 1613000 PR552-15 PowerOhm 15.00 15360 1648000 PR445-13A PowerOhm 15.00 15927...
  • Page 58 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 13.00 2800 238800 PF13R2K80 PowerOhm 13.00 3328 144900 PR13R3K32 PowerOhm 13.00 5200 193100 PR13R5K20 PowerOhm 13.00 5457 191600 PF13R5K45 PowerOhm 13.00 11000 1048200 PF13R11K0 PowerOhm 12.00 Ohms 12.00...
  • Page 59 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 10.40 Ohms 10.40 17300 T10F4R300W PG/IPC 10.40 21400 PRT10F4R300W PowerOhm 10.40 22900 T10F4R600W PG/IPC 10.40 46100 PRT10F4R600W PowerOhm 10.40 24500 T10F4R900W PG/IPC 10.40 114300 PRT10F4R900W PowerOhm 10.40...
  • Page 60 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 9.50 9728 1075300 PR4410-15 PowerOhm 9.50 11926 316618 442-15A PG/IPC 9.50 12312 1520700 PR442-15A PowerOhm 9.50 15200 2596900 PR442-15 PowerOhm 9.50 17890 479901 442-15 PG/IPC 9.50 23750...
  • Page 61 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 8.00 80000 15704400 PR555-18 PowerOhm 7.30 Ohms 7.30 1200 26200 PR2205-10A PowerOhm 7.30 1600 131000 PR2205-10 PowerOhm 7.30 1868 77700 PR2210-10A PowerOhm 7.30 2920 107400 PR2210-10 PowerOhm...
  • Page 62 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 6.00 Ohms 6.00 7776 1086200 PR5505-19A PowerOhm 6.00 12150 1857400 PR5505-19 PowerOhm 6.00 15000 3171800 PR5510-19A PowerOhm 6.00 21600 5176500 PR5510-19 PowerOhm 6.00 28008 1960167 552-19A PG/IPC...
  • Page 63 PR4410-18A PowerOhm 5.00 18000 4658800 PR4410-18 PowerOhm 5.00 22848 1603773 442-18A PG/IPC 5.00 24500 6865200 PR442-18A PowerOhm 5.00 30978 1651395 552-20A PG/IPC 5.00 32000 5593300 PR442-18 PowerOhm 5.00 34269 959801 442-18 PG/IPC 5.00 36125 11352000 PR552-20A PowerOhm 5.00 46464 3891643...
  • Page 64 4.00 44057 3441020 552-21A PG/IPC 4.00 57600 14645800 PR445-19A PowerOhm 4.00 66084 1799627 552-21 PG/IPC 3.90 Ohms 3.90 7897 1238300 PR4405-20A PowerOhm 3.90 14040 3623500 PR4405-20 PowerOhm 3.90 24960 4394700 PR4410-20 PowerOhm 3.90 31590 5255300 PR442-20A PowerOhm 3.90 32736 2405659...
  • Page 65 Selecting An External Resistor for PowerFlex 7-Class Drives Chapter 4 Ohms Watts Watt Seconds Catalog Manufacturer 3.30 Ohms 3.30 1200 61000 PF3F3R1K20 PowerOhm 3.30 1876 105500 PF3F3R1K87 PowerOhm 3.30 2230 124600 PF3F3R2K23 PowerOhm 3.30 2775 317800 PF3F3R2K77 PowerOhm 3.30 3379 380400 PF3F3R3K37 PowerOhm...
  • Page 66 Chapter 4 Selecting An External Resistor for PowerFlex 7-Class Drives Ohms Watts Watt Seconds Catalog Manufacturer 1.88 11520 2259300 PR2210-16 PowerOhm 1.88 14580 2476600 PR222-16A PowerOhm 1.88 15350 782447 222-16A PG/IPC 1.88 23026 1570711 222-16 PG/IPC 1.88 25920 6590600 PR222-16 PowerOhm 1.88 34281...
  • Page 67 Appendix Minimum Dynamic Brake Resistance Table 2 - Minimum Dynamic Break Resistance 120V…240V Drive Normal Regen DC Bus Rated Continuous Power, Internal Resistors (P Minimum Ohms, External Resistors Duty Rating Voltage (V PowerFlex 70 PowerFlex 700 PowerFlex 750-Series PowerFlex Product Frame Watts Frame...

  • Page 68: Appendix A

    Appendix A Minimum Dynamic Brake Resistance Table 3 - Minimum Dynamic Break Resistance 400V…690V Drive Normal Regen DC Bus Minimum Ohms, Rated Continuous Power, Internal Resistors (P Duty Rating Voltage (V External Resistors PowerFlex PowerFlex 70 PowerFlex 700 PowerFlex Product 750-Series Frame Watts Frame Watts Frame Watts Resistance (Ω) 4...

  • Page 69: Appendix A

    Minimum Dynamic Brake Resistance Appendix A Table 3 - Minimum Dynamic Break Resistance 400V…690V (continued) Drive Normal Regen DC Bus Minimum Ohms, Rated Continuous Power, Internal Resistors (P Duty Rating Voltage (V External Resistors PowerFlex PowerFlex 70 PowerFlex 700 PowerFlex Product 750-Series Frame Watts Frame Watts Frame Watts Resistance (Ω) 4...

  • Page 70: Appendix A

    Appendix A Minimum Dynamic Brake Resistance Table 3 - Minimum Dynamic Break Resistance 400V…690V (continued) Drive Normal Regen DC Bus Minimum Ohms, Rated Continuous Power, Internal Resistors (P Duty Rating Voltage (V External Resistors PowerFlex PowerFlex 70 PowerFlex 700 PowerFlex Product 750-Series Frame Watts Frame Watts Frame Watts Resistance (Ω) 4...
  • Page 72 How Are We Doing? form at http://literature.rockwellautomation.com/idc/groups/literature/documents/du/ra-du002_-en-e.pdf. Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Allen-Bradley, PowerFlex, Rockwell Automation, and Rockwell Software are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies.

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