Here ya go. Got these from Mr. Google.
or
Duty cycle is a welding equipment specification which defines the number of minutes, within a 10 minute period, during which a given welder can safely produce a particular welding current.
For example, a 150 amp. welder with a 30% duty cycle must be "rested" for at least 7 minutes after 3 minutes of continuous welding.
or
Mark the welder’s technical description of ‘Duty Cycle’.
Almost all welding machinery for all welding process has a ‘usability rating’ called the ‘duty cycle’.
The ‘usability quality’ of a welding machine is reflected by the value of the ‘duty cycle’.
The duty cycle really details just how long the machine can operate within a
TEN minute welding time without overheating or becoming damaged!
The whole 100% means the machine’s entire welding power output capacity.
The whole 100% is directly expressed as a time period of 10 minutes.
The value of the duty cycle ‘rating’ is normally expressed as a percentage of anywhere from 0% to 100%.
The duty cycle value is then expressed as a percentage (part of) the 100%.
So,
If your welding machine says ‘duty cycle =40% @ xyz amps’ this means that out of a welding ‘on-time’ of only ten minutes, your welder can only safely weld continuously for
4 minutes in every ten minutes , & if you exceed this 4 minutes, you
will risk overheating or damaging your welder!
The ‘
on-time’ that I refer to above is the actual welding time where a welding arc is being produced.
The duty cycle is
not relative to where your welder is only plugged in & switched on, but not being used.
I'm sure others might be able to put the definition into an easier and more digestible manner.