Altivar 32 Variable Speed Drives Page 23 Accessories and Options

23 Altivar 32 variable speed drives Braking resistors Accessories & Options Braking resistors The braking resistor enables the Altivar 32 drive to manage motor braking to a standstill, and braking during motor deceleration, by dissipating braking energy. Braking resistors enable the Altivar 32 to generate maximum transient braking torque in the motor. Depending on the environment, two types of resistors are available: Enclosed model (IP 20 casing) designed to comply with the EMC standard and protected by a temperature controlled switch or thermal overload relay. Enclosed model (IP 65 casing) with an attached cord that can be cut to length and connected to the drive, for ATV32H ppp M2 and ATV32H037N4 to HU75N4 drives. Note: To optimize the size of the braking resistor, the DC buses on Altivar 32 drives in the same application can be connected in parallel (see page 19). For use with high intertia motor loads, generating motor loads and machines with fast cycle times. For drives Minimum value of the resistor to be connected Ohmic value Average power available at 122 F (50C) (1) Length of connection cable Part number Weight W ft m lbs kg IP 65 braking resistors ATV32H018M2 to H075M2 40 100 2.5 0.75 VW3A7608R07 0.9 0.41 ATV32H037 to H075N4 80 100 9.8 3 VW3A7608R30 1.68 0.76 ATV32HU11N4 to HU22N4 54 100 9.8 3 VW3A7608R30 1.68 0.76 ATV32HU11M2, HU15M2 27 72 100 2.5 0.75 VW3A7605R07 1.37 0.62 9.8 3 VW3A7605R30 1.87 0.85 ATV32HU22M2 25 27 200 2.5 0.75 VW3A7603R07 2.05 0.93 9.8 3 VW3A7603R30 2.65 1.2 ATV32HU30N4 54 72 200 2.5 0.75 VW3A7606R07 2.05 0.93 ATV32HU40N4 36 72 200 9.8 3 VW3A7606R30 2.65 1.2 ATV32HU55N4, HU75N4 27 400 2.5 0.75 VW3A7604R07 3.13 1.42 9.8 3 VW3A7604R30 3.57 1.62 IP 20 braking resistors ATV32H018M2 to H075M2 40 100 50 - VW3A7701 4.41 2 ATV32HU11M2, HU15M2 27 ATV32H037N4 to H075N4 80 ATV32HU11N4 to HU30N4 54 ATV32HU40N4 36 ATV32HU22M2 25 60 100 - VW3A7701 5.29 2.4 ATV32HU55N4, HU75N4 27 ATV32HD11N4, HD15N4 8 28 200 - VW3A7701 7.72 3.5 (1) Load factor for resistors: the value of the average power that can be dissipated at 122 F (50C) from the resistor into the casing is determined for a load factor during braking that corresponds to the majority of normal applications: - 2 s braking with a 0.6 Tn braking torque for a 40 s cycle - 0.8 s braking with a 1.5 Tn braking torque for a 40 s cycle VW3A7608R pp VW3A7701

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