Ronch 250MIG, User Manual

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• 3.2. Duty cycle and Over-heat
The letter “X” stands for the duty cycle, which is defined as the proportion of the time that a
machine can work continuously within a certain time (10
minutes). The rated duty cycle means the proportion of the
time that a machine can work continuously within 10 minutes
when it outputs the rated welding current.
The relation between the duty cycle “X” and the output
welding current “I” is shown as the right figure.
If transformer is over-heat, the heat relay inside it will open
and will output an instruction to circuit board, cut AC relay
and the output welding current, and brighten the over-heat
pilot lamp in the front panel. At this time, the machine should
be relaxed for 15 minutes to cool the fan. When operating the
machine again, the welding output current or the duty cycle should be reduced.
• 3.3. Equipment Connection
200
Relation of welding current and duty
cycle for
RONCHWELD 250MIG