text: <s>[INST] PF4 DB I have a 1/2 HP PF4 that is being used near a welding machine. There is a 2 KVA transformer supplying line voltage to the drive. The welding machine is not using this transformer. When the welding machine is turned on, the drive faults on overvoltage (F5). Would a Dynamic Braking resistor solve this problem? [/INST] Hi there, No, a DB resistor would not help, it is intended for bleeding off the energy of the motor for stopping assistance. The welding equipment is inducing transient voltages into the system. What is the voltage of the drive? Do you have a Line Reactor in front of the drive? Cheers \\n </s>