1 Installation Instructions Allen-Bradley 1336/1336VT 1336 PLUS/PLUS II/FORCE/IMPACT Chopper Module Cat. Nos Table of Contents -WA018, WB009 & WC009 -WA070, WB035 & WC035 -WA115, WB110 & WC085 What This Option Provides Where This Option is Used What These Instructions Contain How Dynamic Braking Works How the Chopper Module Works How to Select a Chopper Module and Dynamic Brake Resistor Selecting a Chopper Module and the Dynamic Brake Resistance Example Calculation Ordering Resistors Chopper Module Selection Chopper Module Characteristics WA018, WB009 and WC009 Dimensions and Weights WA070, WB035 and WC035 Dimensions and Weights WA115, WB110 and WC085 Dimensions and Weights Specifications Installation Requirements Mounting Requirements Setup and 1336VT Parameter Settings IMPACT Parameter Settings FORCE Parameter Settings PLUS Parameter Settings Brake Fault Contact Monitoring Brake Fuses Brake Module Jumper Settings WA018, WB009 and WC009 Terminal Block, Fuse and Jumper Locations WA070, WB035 and WC035 Terminal Block, Fuse and Jumper Locations WA115, WB110 and WC085 Terminal Block, Fuse and Jumper Locations WA018, WB009 and WC009 Single Brake Wiring Scheme 1336F BRF and 1336S BRF Drives Only Multiple Brake Wiring Scheme 1336F BRF and 1336S BRF Drives Only WA070, WB035 and WC035 WA115, WB110 and WC085 Single Brake Wiring Scheme 1336F BRF Drives Only Multiple Brake Wiring Scheme 1336F BRF Drives Only WA018, WB009 and WC009 Single Brake Wiring Scheme 1336 (VT, S, F, T, E) Multiple Brake Wiring Scheme 1336 (VT, S, F, T, E) WA070, WB035 and WC035 WA115, WB110 and WC085 Single Brake Wiring Scheme 1336 (VT, S, F, T, E) Multiple Brake Wiring Scheme 1336 (VT, S, F, T, E)
2 2 Heavy Duty Dynamic Braking What This Option Provides The brake chopper module is an open style assembly that together with customer supplied braking resistors can increase the braking torque capability of a 1336, 1336VT, 1336PLUS, 1336PLUSII, 1336FORCE or 1336IMPACT drive from approximately 10 to 100%. Where This Option is Used B003-B250 and C003-C Drives. B003-B VT Drives. AQF05-A125, BRF05-B600 and CWF10-C PLUS and 1336PLUSII Drives. A001-A125, B001-B600 and C001-C FORCE and 1336IMPACT Drives W B VT 1336PLUS 1336PLUS II 1336FORCE Brake Chopper Module Voltage Rating A = 230VAC B = 380/415/460VAC C = 575VAC Continuous Amp Rating 018 = 375VDC, 18.0ADC 070 = 375VDC, 70.0ADC 115 = 375VDC, 115.0ADC 009 = 750VDC, 9.0ADC 035 = 750VDC, 35.0ADC 110 = 750VDC, 110.0ADC 009 = 935VDC, 9.0ADC 035 = 935VDC, 35.0ADC 085 = 935VDC, 85.0ADC What These Instructions Contain How Dynamic Braking Works These instructions contain the necessary information to select, configure and install dynamic braking. By completing Selecting a Chopper Module and the Maximum Dynamic Brake Resistance first you will be able to determine: 1. Whether or not dynamic braking is required for your application. 2. If dynamic braking is required, the rating and quantity of chopper modules required as well as the size and type of braking resistors required. When an induction motor s rotor is turning 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. When the rotor is turning faster than the synchronous speed set by the drive s output power, the motor is transforming mechanical energy available at the drive shaft of the motor into electrical energy that can be transferred back into the utility grid. This process is referred to as regeneration. Most AC PWM drives convert AC power from the fixed frequency utility grid into DC power by means of a diode rectifier bridge or controlled SCR bridge before it is inverted into variable frequency AC power. Diode and SCR bridges are cost effective, but can only handle power in the motoring direction. Therefore, if the motor is regenerating, the bridge cannot conduct
3 Heavy Duty Dynamic Braking 3 the necessary negative DC current, the DC bus voltage will increase and cause a Bus Overvoltage trip at the drive. Expensive bridge configurations use SCRs or transistors that can transform DC regenerative electrical energy into fixed frequency utility electrical energy. A more cost effective solution is to provide a Transistor Chopper on the DC Bus of the AC PWM drive that feeds a power resistor which transforms the regenerative electrical energy into thermal energy. This is generally referred to as Dynamic Braking. How the Chopper Module Works Figure 1 shows a simplified schematic of a Chopper Module with Dynamic Brake Resistor. The Chopper Module is shown connected to the positive and negative conductors of an AC PWM Drive. The two series connected Bus Caps are part of the DC Bus filter of the AC Drive. A Chopper Module contains five significant power components: Protective fuses are sized to work in conjunction with a Crowbar SCR. Sensing circuitry within the Chopper Transistor Voltage Control determines if an abnormal conditions exist within the Chopper Module, such as a shorted Chopper Transistor. When an abnormal condition is sensed, the Chopper Transistor Voltage Control will fire the Crowbar SCR, shorting the DC Bus, and melting the fuse links. This action isolates the Chopper Module from the DC Bus until the problem can be resolved. The Chopper Transistor is an Insulated Gate Bipolar Transistor (IGBT). The Chopper Transistor is either ON or OFF, connecting the Dynamic Brake Resistor to the DC Bus and dissipating power, or isolating the resistor from the DC Bus. There are several transistor ratings that are used in the various Chopper Module ratings. The most important rating is the collector current rating of the Chopper Transistor that helps to determine the minimum ohmic value used for the Dynamic Brake Resistor. Chopper Transistor Voltage Control (hysteretic voltage comparator) regulates the voltage of the DC Bus during regeneration. The average values of DC Bus voltages are: 375V DC (for 230V AC input) 750V DC (for 460V AC input) 937.5V DC (for 575V AC input) Voltage dividers reduce the DC Bus voltage to a value that is usable in signal circuit isolation and control. The DC Bus feedback voltage from the voltage dividers is compared to a reference voltage to actuate the Chopper Transistor. The Freewheel Diode (FWD), in parallel with the Dynamic Brake Resistor, allows any magnetic energy stored in the parasitic inductance of that circuit to be safely dissipated during turn off of the Chopper Transistor.
4 4 Heavy Duty Dynamic Braking Figure 1 Schematic of Chopper Module and Dynamic Brake Resistor + DC Bus Fuse Bus Caps To Voltage Dividers Dynamic Brake Resistor FWD Voltage Divider To Voltage Control Chopper Transistor Signal Common Chopper Transistor Voltage Control FWD To Voltage Control Voltage Divider Crowbar SCR Bus Caps To Crowbar SCR Gate DC Bus Fuse To Voltage Control Chopper Modules are designed to be applied in parallel if the current rating is insufficient for the application. One Chopper Module is the designated Master Chopper Module, while any other Modules are the designated Follower Modules. Two lights are provided on the front of the enclosure to indicate operation. DC Power light illuminates when DC power has been applied to the Chopper Module. Brake On light flickers when the Chopper Module is operating (chopping).
5 Heavy Duty Dynamic Braking 5 How to Select a Chopper Module and Dynamic Brake Resistor As a rule, a Chopper Module can be specified when regenerative energy is dissipated on an occasional or periodic basis. In general, the motor power rating, speed, torque, and details regarding the regenerative mode of operation will be needed in order to estimate what Chopper Module rating and Dynamic Brake Resistor value to use. If a drive is consistently operating in the regenerative mode of operation, serious consideration should be given to equipment that will transform the electrical energy back to the fixed frequency utility. In order to select the appropriate Chopper Module and Dynamic Brake Resistor for your application, the following data must be calculated. Peak Regenerative Power of the Drive (Expressed in watts of power.) This value is used to determine: The minimum current rating of the Chopper Module Choose the actual current rating from the selection tables. The estimated maximum ohmic value of the Dynamic Brake Resistor If this value is greater than the maximum imposed by the peak regenerative power of the drive, the drive can trip off due to transient DC Bus overvoltage problems. Minimum Dynamic Brake Resistance If a Dynamic Brake Resistance value that is less than the minimum imposed by the choice of the Chopper Module is applied, damage can occur to the Chopper Transistor. Dynamic Brake Resistor s Allowable Ohmic Value Range (Use the Chopper Module current rating to determine this range.) These values range between the minimum value set by the Chopper Transistor current rating and the maximum value set by the peak regenerative power developed by the drive in order to decelerate or satisfy other regenerative applications. Wattage Rating of the Dynamic Brake Resistor This rating is estimated by applying what is known about the drive s motoring and regenerating modes of operation. The average power dissipation of the regenerative mode must be estimated and the wattage of the Dynamic Brake Resistor chosen to be greater than the average regenerative power dissipation of the drive. Dynamic Brake Resistors with large thermodynamic heat capacities, defined as thermal time constants less than 5 seconds, are able to absorb a large amount of energy without the temperature of the resistor element exceeding the operational temperature rating. Thermal time constants in the order of 50 seconds and higher satisfy the criteria of large heat capacities for these applications. If a resistor has a small heat capacity, the temperature of the resistor element could exceed maximum temperature limits during the application of pulse power to the element.
6 6 Heavy Duty Dynamic Braking Selecting a Chopper Module and the Maximum Dynamic Brake Resistance The following calculations are demonstrated using The International System of Units (SI). Gather the following information: Power rating from motor nameplate in watts, kilowatts, or horsepower Speed rating from motor nameplate in rpm or rps (radians per second) Motor inertia and load inertia in kg-m 2 or lb-ft 2 Gear ratio (GR) if a gear is present between the motor and load Motor shaft speed, torque, and power profile of the drive application Figure 2 shows the speed, torque, and power profiles of the drive as a function of time for a particular cyclic application that is periodic over t 4 seconds. The desired time to decelerate is known or calculable and is within the drive performance limits. In Figure 2, the following variables are defined: ω(t) = Motor shaft speed in radians per second (rps) ω Rad s = 2πN 60 N(t) = Motor shaft speed in Revolutions Per Minute (RPM) T(t) = Motor shaft torque in Newton-meters 1.0 lb-ft = N-m P(t) = Motor shaft power in watts 1.0 HP = 746 watts -Pb = Motor shaft peak regenerative power in watts
7 Heavy Duty Dynamic Braking 7 Figure 2 Application Speed, Torque and Power Profiles ω(t) ω b ω o 0 t1 t2 t3 t4 t1 + t4 t T(t) 0 t1 t2 t3 t4 t1 + t4 t P(t) 0 t1 t2 t3 t4 t1 + t4 t -Pb
8 8 Heavy Duty Dynamic Braking Step 1 Determine Gear Ratio GR= Turns of Load Turns of Motor GR = Step 2 Determine the Total Inertia J T = J m + GR 2 J L J T = Total inertia reflected to the motor shaft (kg-m 2 or lb-ft 2 ) J m = Motor inertia (kg-m 2 or lb-ft 2 ) GR = Gear ratio of any gear between motor and load (dimensionless) J L = Load inertia (kg-m 2 or lb-ft 2 ) 1.0 lb-ft 2 = kg-m 2 J T = [ + ] [ ] J T = kg-m 2 or lb-ft 2 Step 3 Calculate the Peak Braking Power P b = J T ω b (ω b - ω o ) (t 3 - t 2 ) J T = Total inertia reflected to the motor shaft (kg-m 2 ) ω b = Rated angular rotational speed (Rad / s = 2πN b / 60) ω o N b = Angular rotational speed, less than rated speed down to zero (Rad / s) = Rated motor speed (RPM) t 3 - t 2 = Deceleration time from ω b to ω o (seconds) P b = Peak braking power (watts) 1.0 HP = 746 watts P b = [ ( - )] [ ] P b = watts Compare the peak braking power to that of the rated motor power. If the peak braking power is greater that 1.5 times that of the motor, then the deceleration time (t 3 - t 2 ) needs to be increased so that the drive does not go into current limit.
9 Heavy Duty Dynamic Braking 9 Step 4 Calculate the Maximum Dynamic Brake Resistance Value R db1 = V d 2 P b R db1 = Maximum allowable value for the dynamic brake resistor (ohms) V d = DC Bus voltage the chopper module regulates to (375V DC, 750V DC, or 937.5V DC) P b = Peak braking power calculated in Step 2 (watts) R db1 = [ ] [ ] R db1 = ohms The choice of the Dynamic Brake resistance value should be less than the value calculated in Step 4. If the resistance value is greater than the value calculated in Step 4, the drive can trip on DC Bus overvoltage. Step 5 Calculate the Minimum Chopper Module Current Rating I d1 = V d R db1 I d1 = Minimum current flow through Chopper Transistor V d = Value of DC Bus voltage chosen in Step 3 R db1 = Value of Dynamic Brake Resistor calculated in Step 3 I d1 = [ ] [ ] I d1 = amps The value of I d1 sets the minimum current rating for the Chopper Module. When choosing a Chopper Module, the current rating for the Chopper Transistor must be greater than or equal to the value calculated for I d1. Step 6 Calculate the Minimum Dynamic Brake Resistor Value V R db2 = d 0.75 I d2 R db2 = Minimum ohmic value of the Dynamic Brake Resistor V d = Value of DC Bus voltage chosen in Step 3 I d2 = Value of Chopper Module current rating R db2 = [ ] [ ] R db2 = ohms This step calculates the minimum resistance value that the Dynamic Brake Resistor can have. If a lower resistance were to be used with the Chopper Module of choice, the IGBT could be damaged from overcurrent.
10 10 Heavy Duty Dynamic Braking Step 7 Choose the Dynamic Brake Resistance Value Use to Table 1a, 2a, or 3a to choose the correct table based on the Chopper Module s regulating voltage. 1. Find the column that lists the value of Dynamic Brake Resistance for the various Dynamic Brake Resistor assemblies. 2. Choose the resistor value that lies between R db1 and R db2. Preferred resistance values are as close R db1 as possible. Step 8 Estimate the Minimum Wattage Requirements for the Dynamic Brake Resistor It is assumed that the application exhibits a periodic function of acceleration and deceleration. If (t 3 - t 2 ) equals the time in seconds necessary for deceleration from rated speed to 0 speed, and t 4 is the time in seconds before the process repeats itself, then the average duty cycle is (t 3 - t 2 )/t 4. The power as a function of time is a linearly decreasing function from a value equal to the peak regenerative power to 0 after (t 3 - t 2 ) seconds have elapsed. The average power regenerated over the interval of (t 3 - t 2 ) seconds is P b /2. The average power in watts regenerated over the period t 4 is: [t 3 - t 2 ] P av = t 4 P av = Average dynamic brake resister dissipation (watts) t 3 - t 2 = Deceleration time from ω b to ω o (seconds) t 4 P b P b 2 ω b + ω o ( ω b ) = Total cycle time or period of process (seconds) = Peak braking power (watts) ω b = Rated motor speed (Rad / s) ω o = A lower motor speed (Rad / s) P av = [ ] [ ] [ ] 2 P av = watts The Dynamic Brake Resistor power rating, in watts, that is chosen should be equal to or greater than the value calculated in Step 8. Example Calculation Application Information A 100 HP, 460 Volt motor and drive is accelerating and decelerating as depicted in Figure 2. Cycle period (t 4 ) is 60 seconds Rated speed is 1785 RPM Deceleration time from rated speed to 0 speed is 6.0 seconds Motor load can be considered purely as an inertia All power expended or absorbed by the motor is absorbed by the motor and load inertia Load inertia is directly coupled to the motor Motor inertia plus load inertia is given as 9.61 kg-m 2
11 Heavy Duty Dynamic Braking 11 Calculate Application Values Use the Application Information to calculate the necessary values to choose an acceptable Chopper Module and Dynamic Brake Resistor. Rated Power of Motor = 100 HP 746 = 74.6 kw This information is given and must be known before the calculation process begins. If this rating is given in horsepower, convert to watts before using in the equations. Rated Speed = 1785 RPM = 2π 1785/60 = Rad/s = ω This information is given and must be known before the calculation process begins. If this rating is given in RPM, convert to radians per second before using in the equations. Total Inertia = 9.61 kg-m 2 = J T If this value is given in lb-ft 2 or Wk 2, convert to kg-m 2 before using in the equations. Total inertia is given and does not need further calculations as outlined in Step 2. Deceleration Time = 6.0 seconds = (t 3 - t 2 ) Period of Cycle = 60 seconds = t 4 DC Bus Voltage = 750 Volts = V d This is known because the drive is rated at 460 Volts rms. If a drive is rated 230 Volts rms, V d = 375 Volts. If a drive is rated 575 Volts rms, V d = Volts. Select the Correct Chopper Module Peak Braking Power = J T ω 2 /(t 3 - t 2 ) = kw = P b This is 75% rated power and is less than the maximum drive limit of 150% current limit. This calculation is the result of Step 3 and determines the peak power that must be dissipated by the Dynamic Brake Resistor. Maximum Dynamic Brake Resistance = V d 2 /P b = 10.5 ohms = R db1 This calculation is the result of Step 4 and determines the maximum ohmic value of the Dynamic Brake Resistor. Note that a choice of V d = 750 Volts DC was made based on the premise that the drive is rated at 460 Volts. Minimum Current Flow = V d /R db1 = amps = I d1 This calculation is the result of Step 5. This is the minimum value of current that will flow through the Dynamic Brake Resistor when the Chopper Module Transistor is turned on. Refer to Table 2b in the Installation Instructions for the Brake Chopper Module, Publication Choose the Brake Chopper Module whose peak current capacity is greater than amps. The correct choice must be the WB035 Chopper Module because it has a current rating greater than amps.
12 12 Heavy Duty Dynamic Braking Minimum Dynamic Brake Resistance = V d /I d2 = 10 ohms = R db2 This is the result of Step 6 and is also included as a value in Table 2b. Choose the 10.4 ohms resistor, type T10F4R2K97, rated at 2.97 kw from Table 2a. Average Power Dissipation = [(t 3 - t 2 )/t 4 ]P b /2 = 2.8 kw = P av This is the result of calculating the average power dissipation as outlined in Step 8. Verify that the power rating of the Dynamic Brake Resistor chosen in Step 7 is greater than the value calculated in Step 8. Note that the actual resistor wattage rating is much greater than what is needed. The type T10F4R2K97 assembly is the best choice based on resistance and wattage values. Ordering Resistors Resistor assemblies listed are manufactured by IPC Power Resistors International Incorporated and Powerohm Resistors Incorporated and have been tested with Allen-Bradley Chopper Modules. Available resistor assembly options include an overtemperature switch (see Wiring Schemes), auxiliary terminal blocks and custom enclosures. For purchase information, contact: IPC Power Resistors International Inc. 167 Gap Way Erlanger, KY Tel Fax. (859) Powerohm Resistors Inc th Street Katy, TX Tel Fax. (859)
13 Heavy Duty Dynamic Braking 13 Chopper Module Selection Ohms Watts Catalog Watt Seconds Manufacturer IPC A 6260 IPC A 6260 IPC IPC IPC A 4929 IPC IPC A 7981 IPC A 7981 IPC IPC IPC A 4225 IPC IPC A 4225 IPC A IPC IPC IPC A 5634 IPC IPC A IPC A IPC IPC IPC A 2973 IPC IPC A 2973 IPC IPC A 9389 IPC IPC A 3990 IPC IPC A IPC IPC A IPC IPC A 3677 IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A 5321 IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC Ohms Watts Catalog Watt Seconds Manufacturer A 6416 IPC IPC A 6416 IPC IPC A IPC IPC PF150R400W 7700 Powerohm PF150R800W Powerohm PF150R1K Powerohm PF150R1K Powerohm PF150R2K Powerohm PF150R2K Powerohm PF150R2K Powerohm PF150R3K Powerohm PF150R3K Powerohm PF150R4K Powerohm PF150R5K Powerohm PF150R5K Powerohm A IPC IPC A IPC IPC A IPC IPC PF125R400W 6500 Powerohm PF125R800W Powerohm PF125R1K Powerohm A IPC PF125R1K Powerohm IPC PF125R2K Powerohm A IPC PF125R3K Powerohm PF125R4K Powerohm A IPC IPC IPC PF125R7K Powerohm PF125R7K Powerohm T117R300W 7950 IPC T117R600W IPC T117R900W IPC T117R1K IPC T117R1K IPC T117R2K IPC T117R2K IPC T117R3K IPC A 7511 IPC IPC A IPC IPC A IPC IPC PF100R400W 5200 Powerohm PF100R800W Powerohm PF100R1K Powerohm PF100R1K Powerohm PF100R2K Powerohm PF100R2K Powerohm PF100R2K Powerohm PF100R3K Powerohm PF100R4K Powerohm PF100R4K Powerohm PF100R5K Powerohm PF100R5K Powerohm
14 14 Heavy Duty Dynamic Braking Ohms Watts Catalog Watt Seconds Manufacturer PF100R6K Powerohm PF100R8K Powerohm PF100R9K Powerohm T97R300W IPC T97R600W IPC T97R900W IPC T97R1K IPC T97R1K IPC T97R2K IPC T97R2K IPC T97R3K IPC T97R3K IPC T97R4K IPC A 9076 IPC PF85R400W 6900 Powerohm IPC A IPC PF85R800W Powerohm A IPC IPC PF85R1K Powerohm PF85R1K Powerohm IPC PF85R2K Powerohm A IPC IPC PF85R2K Powerohm PF85R3K Powerohm A IPC PF85R5K Powerohm PF85R5K Powerohm PF85R6K Powerohm IPC A IPC PF85R7K Powerohm PF85R10K Powerohm IPC PF85R11K Powerohm A IPC IPC A IPC IPC A IPC IPC T80R300W 8530 IPC PF80R400W 6500 Powerohm T80R600W IPC PF80R800W Powerohm T80R900W IPC T80R1K IPC PF80R1K Powerohm T80R1K IPC PF80R2K Powerohm T80R2K IPC T80R2K IPC T80R3K IPC T80R3K IPC PF80R4K Powerohm T80R4K IPC T80R4K IPC T80R5K IPC PF80R7K Powerohm PF80R8K Powerohm T80R9K IPC T80R9K IPC T77R300W 8210 IPC T77R600W IPC Ohms Watts Catalog Watt Seconds Manufacturer T77R900W IPC T77R1K IPC T77R1K IPC T77R2K IPC T77R2K IPC T77R3K IPC T77R3K IPC T77R4K IPC T77R4K IPC T77R5K IPC T77R9K IPC T77R9K IPC PF70R400W 5700 Powerohm PF70R800W Powerohm PF70R1K Powerohm PF70R2K Powerohm A IPC IPC PF70R4K Powerohm A IPC IPC A IPC PF70R9K Powerohm IPC PF65R400W 9500 Powerohm PF65R800W Powerohm PF65R1K Powerohm PF65R2K Powerohm PF65R2K Powerohm PF65R3K Powerohm PF65R4K Powerohm PF65R7K Powerohm PF65R7K Powerohm PF65R16K Powerohm T60R300W IPC PF60R400W 8700 Powerohm T60R600W IPC PF60R800W Powerohm T60R900W IPC T60R1K IPC T60R1K IPC PF60R2K Powerohm T60R2K IPC T60R3K IPC PF60R4K Powerohm T60R4K IPC T60R6K IPC PF60R8K Powerohm T60R11K IPC PF60R15K Powerohm A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC IPC PF55R400W 8000 Powerohm PF55R800W Powerohm PF52R400W Powerohm PF52R800W Powerohm PF52R1K Powerohm
15 Heavy Duty Dynamic Braking 15 Ohms Watts Catalog Watt Seconds Manufacturer PF52R1K Powerohm PF52R2K Powerohm PF52R2K Powerohm PF52R3K Powerohm PF52R4K Powerohm PF52R5K Powerohm PF52R6K Powerohm PF52R9K Powerohm PF52R13K Powerohm PF52R18K Powerohm T48R300W IPC PF48R400W 9600 Powerohm T48R600W IPC PF48R800W Powerohm T48R900W IPC T48R1K IPC PF48R1K Powerohm T48R1K IPC PF48R2K Powerohm T48R2K IPC T48R3K IPC T48R3K IPC PF48R3K Powerohm T48R4K IPC T48R5K IPC T48R6K IPC T48R12K IPC T48R19K IPC T48R20K IPC T45R300W IPC T45R600W IPC A IPC IPC T45R1K IPC A IPC T45R1K IPC A IPC IPC T45R2K IPC T45R2K IPC T45R3K IPC IPC T45R3K IPC A IPC IPC T45R6K IPC A IPC T45R12K IPC IPC A IPC T45R19K IPC IPC PF44R400W 8800 Powerohm PF44R800W Powerohm PF44R1K Powerohm PF44R2K Powerohm A IPC PF44R2K Powerohm IPC PF44R3K Powerohm PF44R4K Powerohm PF44R5K Powerohm A IPC PF44R7K Powerohm PF44R7K Powerohm IPC A IPC Ohms Watts Catalog Watt Seconds Manufacturer PF44R11K Powerohm IPC PF44R15K Powerohm PF44R23K Powerohm T40R300W IPC PF40R400W 8000 Powerohm PF40R800W Powerohm T40R900W IPC T40R1K IPC PF40R1K Powerohm T40R1K IPC PF40R2K Powerohm PF40R3K Powerohm T40R4K IPC PF40R4K Powerohm PF40R6K Powerohm T40R10K IPC PF40R10K Powerohm T40R11K IPC PF40R11K Powerohm T40R16K IPC PF40R16K Powerohm T40R17K IPC T40R19K IPC T40R22K IPC PF40R22K Powerohm PF36R400W Powerohm PF36R800W Powerohm PF36R1K Powerohm PF36R1K Powerohm PF36R2K Powerohm PF36R2K Powerohm PF36R4K Powerohm PF36R4K Powerohm PF36R9K Powerohm A IPC IPC A IPC PF36R19K Powerohm IPC A IPC IPC T34R300W IPC T34R900W IPC T34R1K IPC T34R2K IPC T34R3K IPC T34R4K IPC T34R8K IPC T34R9K IPC T34R13K IPC T34R15K IPC T34R17K IPC T34R18K IPC T34R19K IPC T34R26K IPC T32R300W IPC PF32R400W Powerohm T32R600W IPC PF32R800W Powerohm A IPC T32R900W IPC IPC PF32R1K Powerohm T32R1K IPC PF32R1K Powerohm A IPC
16 16 Heavy Duty Dynamic Braking Ohms Watts Catalog Watt Seconds Manufacturer PF32R2K Powerohm T32R2K IPC PF32R2K Powerohm T32R2K IPC PF32R2K Powerohm IPC A IPC PF32R3K Powerohm T32R4K IPC IPC T32R4K IPC PF32R4K Powerohm PF32R5K Powerohm T32R8K IPC PF32R9K Powerohm PF32R10K Powerohm T32R12K IPC PF32R13K Powerohm T32R17K IPC T32R18K IPC PF32R18K Powerohm PF32R21K Powerohm T32R26K IPC PF32R27K Powerohm T32R28K IPC A IPC IPC A IPC A IPC IPC IPC PF28R400W Powerohm PF28R800W Powerohm PF28R1K Powerohm PF28R1K Powerohm PF28R2K Powerohm PF28R2K Powerohm PF28R4K Powerohm PF28R4K Powerohm PF28R5K Powerohm A IPC PF28R7K Powerohm IPC PF28R9K Powerohm PF28R11K Powerohm A IPC PF28R15K Powerohm PF28R18K Powerohm A IPC IPC PF28R23K Powerohm PF28R30K Powerohm IPC PF28R36K Powerohm T27R300W IPC T27R600W IPC T27R900W IPC T27R1K IPC T27R1K IPC T27R2K IPC T27R3K IPC T27R8K IPC T27R11K IPC T27R15K IPC T27R21K IPC T27R27K IPC T25R300W IPC Ohms Watts Catalog Watt Seconds Manufacturer PF25R400W Powerohm T25R600W IPC PF25R800W Powerohm T25R900W IPC T25R1K IPC PF25R1K Powerohm T25R1K IPC PF25R1K Powerohm PF25R2K Powerohm PF25R2K Powerohm PF25R2K Powerohm PF25R3K Powerohm T25R3K IPC T25R3K IPC PF25R6K Powerohm T25R8K IPC PF25R10K Powerohm PF25R13K Powerohm PF25R21K Powerohm PF25R25K Powerohm PF25R32K Powerohm PF25R40K Powerohm PF25R55K Powerohm A IPC IPC A IPC IPC A IPC IPC T23R300W IPC T23R600W IPC PF23R800W Powerohm T23R900W IPC PF23R1K Powerohm T23R1K IPC PF23R1K Powerohm PF23R2K Powerohm T23R2K IPC PF23R3K Powerohm A IPC T23R6K IPC IPC PF23R7K Powerohm T23R7K IPC T23R10K IPC A IPC PF23R15K Powerohm IPC PF23R29K Powerohm PF21R400W Powerohm PF21R800W Powerohm PF21R1K Powerohm PF21R1K Powerohm PF21R2K Powerohm PF21R2K Powerohm PF21R3K Powerohm PF21R4K Powerohm PF21R5K Powerohm PF21R7K Powerohm PF21R8K Powerohm PF21R11K Powerohm PF21R17K Powerohm PF21R22K Powerohm PF21R33K Powerohm PF21R45K Powerohm PF21R70K Powerohm T20R300W IPC
17 Heavy Duty Dynamic Braking 17 Ohms Watts Catalog Watt Seconds Manufacturer T20R600W IPC T20R900W IPC A IPC T20R1K IPC IPC A IPC A IPC IPC T20R5K IPC IPC T20R8K IPC T20R10K IPC T20R15K IPC A IPC T20R20K IPC IPC T20R28K IPC T20R34K IPC PF19R400W Powerohm PF19R800W Powerohm PF19R1K Powerohm PF19R1K Powerohm PF19R2K Powerohm PF19R2K Powerohm PF19R3K Powerohm PF19R4K Powerohm PF19R6K Powerohm PF19R8K Powerohm A IPC PF19R10K Powerohm IPC PF19R13K Powerohm PF19R16K Powerohm PF19R19K Powerohm A IPC PF19R30K Powerohm A IPC IPC PF19R40K Powerohm IPC PF19R63K Powerohm PF19R77K Powerohm A IPC IPC A IPC A IPC IPC IPC PF15F4R800W Powerohm PF15F4R1K Powerohm PF15F4R2K Powerohm PF15F4R5K Powerohm PF15F4R10K Powerohm PF15F4R20K Powerohm PF15F4R41K Powerohm T15R300W IPC T15R600W IPC T15R900W IPC T15R1K IPC T15R4K IPC T15R6K IPC A IPC T15R8K IPC IPC T15R11K IPC A IPC A IPC Ohms Watts Catalog Watt Seconds Manufacturer IPC A IPC IPC A IPC IPC A IPC IPC IPC T14R300W IPC T14R600W IPC T14R900W IPC T14R1K IPC T14R1K IPC A IPC IPC A IPC T14R6K IPC IPC A IPC IPC T14R11K IPC T14R12K IPC PF13R800W Powerohm PF13R1K Powerohm PF13R2K Powerohm PF13R5K Powerohm PF13R11K Powerohm A IPC IPC A IPC IPC A IPC A IPC A IPC IPC A IPC IPC IPC IPC PF11F5R400W Powerohm PF11F5R800W Powerohm PF11F5R1K Powerohm PF11F5R2K Powerohm PF11F5R2K Powerohm PF11F5R3K Powerohm PF11F5R4K Powerohm PF11F5R6K Powerohm PF11F5R7K Powerohm PF11F5R9K Powerohm PF11F5R11K Powerohm PF11F5R14K Powerohm PF11F5R18K Powerohm PF11F5R24K Powerohm PF11F5R31K Powerohm PF11F5R59K Powerohm PF11F5R110K Powerohm A IPC IPC A IPC IPC A IPC IPC T10F4R300W IPC T10F4R600W IPC T10F4R900W IPC T10F4R1K IPC T10F4R2K IPC
18 18 Heavy Duty Dynamic Braking Ohms Watts Catalog Watt Seconds Manufacturer T10F4R5K IPC T10F4R6K IPC T10F4R8K IPC T10F4R11K IPC T10F4R15K IPC T10F4R18K IPC T10F4R26K IPC T10F4R35K IPC T10F4R43K IPC T10F4R72K IPC PF10F1R400W Powerohm PF10F1R800W Powerohm PF10F1R1K Powerohm A IPC IPC A IPC A IPC IPC A IPC IPC A IPC A IPC IPC IPC PF9F2R400W Powerohm PF9F2R800W Powerohm PF9F2R1K Powerohm PF9F2R1K Powerohm PF9F2R2K Powerohm PF9F2R2K Powerohm PF9F2R2K Powerohm PF9F2R3K Powerohm PF9F2R4K Powerohm PF9F2R6K Powerohm PF9F2R7K Powerohm PF9F2R9K Powerohm PF9F2R11K Powerohm PF9F2R15K Powerohm PF9F2R19K Powerohm PF9F2R24K Powerohm PF9F2R30K Powerohm PF9F2R37K Powerohm PF9F2R47K Powerohm PF9F2R58K Powerohm PF9F2R69K Powerohm PF9F2R90K Powerohm PF9F2R132K Powerohm A IPC IPC A IPC A IPC IPC A IPC IPC A IPC IPC IPC A IPC IPC A IPC IPC A IPC IPC PF7R400W Powerohm PF7R800W Powerohm PF7R1K Powerohm PF7R1K Powerohm Ohms Watts Catalog Watt Seconds Manufacturer PF7R2K Powerohm PF7R2K Powerohm PF7R3K Powerohm PF7R4K Powerohm PF7R6K Powerohm PF7R7K Powerohm PF7R9K Powerohm PF7R11K Powerohm PF7R14K Powerohm PF7R18K Powerohm PF7R23K Powerohm PF7R28K Powerohm PF7R36K Powerohm PF7R45K Powerohm PF7R55K Powerohm PF7R64K Powerohm PF7R81K Powerohm PF7R110K Powerohm PF7R127K Powerohm PF7R157K Powerohm PF6F5R2K Powerohm PF6F5R2K Powerohm PF6F5R3K Powerohm PF6F5R4K Powerohm PF6F5R5K Powerohm PF6F5R6K Powerohm PF6F5R8K Powerohm A IPC IPC A IPC A IPC IPC A IPC IPC A IPC A IPC IPC A IPC IPC A IPC IPC T5F4R1K IPC T5F4R2K IPC T5F4R5K IPC T5F4R5K IPC T5F4R7K IPC T5F4R12K IPC T5F4R20K IPC T5F4R22K IPC T5F4R37K IPC T5F4R48K IPC T5F4R51K IPC T5F4R104K IPC PF5F1R400W Powerohm PF5F1R800W Powerohm PF5F1R1K Powerohm PF5F1R2K Powerohm PF5F1R3K Powerohm PF5F1R4K Powerohm PF5F1R5K Powerohm PF5F1R6K Powerohm PF5F1R8K Powerohm PF5F1R10K Powerohm PF5F1R13K Powerohm PF5F1R17K Powerohm PF5F1R27K Powerohm PF5F1R32K Powerohm
19 Heavy Duty Dynamic Braking 19 Ohms Watts Catalog Watt Seconds Manufacturer PF5F1R59K Powerohm PF5F1R114K Powerohm A IPC A IPC IPC IPC A IPC IPC T4F8R2K IPC T4F8R4K IPC T4F8R5K IPC T4F8R8K IPC T4F8R10K IPC T4F8R19K IPC T4F8R25K IPC T4F8R34K IPC T4F8R58K IPC T4F8R61K IPC T4F8R99K IPC T4F8R132K IPC PF4F6R400W Powerohm PF4F6R800W Powerohm PF4F6R1K Powerohm PF4F6R1K Powerohm PF4F6R1K Powerohm PF4F6R1K Powerohm PF4F6R2K Powerohm PF4F6R3K Powerohm PF4F6R3K Powerohm PF4F6R4K Powerohm PF4F6R7K Powerohm PF4F6R9K Powerohm PF4F6R12K Powerohm PF4F6R15K Powerohm PF4F6R18K Powerohm PF4F6R23K Powerohm PF4F6R34K Powerohm PF4F6R66K Powerohm PF4F6R149K Powerohm A IPC IPC A IPC A IPC IPC IPC A IPC IPC A IPC IPC A IPC IPC A IPC A IPC IPC A IPC A IPC Ohms Watts Catalog Watt Seconds Manufacturer IPC IPC PF3F3R1K Powerohm PF3F3R1K Powerohm PF3F3R2K Powerohm PF3F3R2K Powerohm PF3F3R3K Powerohm PF3F3R4K Powerohm PF3F3R6K Powerohm PF3F3R9K Powerohm PF3F3R11K Powerohm PF3F3R13K Powerohm PF3F3R21K Powerohm PF3F3R24K Powerohm PF3F3R38K Powerohm PF3F3R47K Powerohm PF3F3R75K Powerohm PF3F3R106K Powerohm PF3F3R150K Powerohm PF3F3R214K Powerohm A IPC IPC A IPC A IPC IPC A IPC PF2F3R800W Powerohm PF2F3R1K Powerohm PF2F3R1K Powerohm PF2F3R1K Powerohm PF2F3R1K Powerohm PF2F3R2K Powerohm PF2F3R2K Powerohm PF2F3R3K Powerohm PF2F3R7K Powerohm PF2F3R9K Powerohm PF2F3R14K Powerohm PF2F3R17K Powerohm PF2F3R27K Powerohm PF2F3R33K Powerohm PF2F3R55K Powerohm PF2F3R74K Powerohm A IPC IPC A IPC IPC PF2F1R1K Powerohm PF2F1R1K Powerohm PF2F1R1K Powerohm PF2F1R2K Powerohm PF2F1R2K Powerohm PF2F1R3K Powerohm PF2F1R4K Powerohm A IPC IPC A IPC A IPC
20 20 Heavy Duty Dynamic Braking Chopper Module Characteristics Drive Voltage (Volts AC) Turn-On Voltage (Volts DC) Catalog Number Chopper Peak Transistor Current Rating (Amps) Minimum Dynamic Brake Resistance Value (Ohms) WA WA WA WB WB WB WC WC WC