How long must a welding machine with a 50 percent duty cycle cool off?

welding machine with a 50 percent duty cycle must cool off for 30 minutes. The duty cycle of a welding machine refers to the percentage of time that the machine can be used continuously without overheating. A 50 percent duty cycle means that the machine can be used for 50 percent of the time and must cool off for the remaining 50 percent of the time. In this case, the cooling time is half of the total cycle time, which is 30 minutes.