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2. duty cycle and overheating, 3. volt-ampere curves – Miller Electric 652 User Manual

Page 19

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OM-228 470 Page 15

4-2. Duty Cycle And Overheating

Duty Cycle is percentage of 10 min-

utes that unit can weld at rated load

without overheating.
If unit overheats, thermostat(s)

opens, output stops, and cooling

fan runs. Wait fifteen minutes for

unit to cool. Reduce amperage or

duty cycle before welding.
NOTICE − Exceeding duty cycle

can damage unit and void warranty.

100% Duty Cycle

Overheating

0

15

A/V

OR

Reduce Duty Cycle

Minutes

duty1 4/95 / Ref. 168 918

Continuous Welding

4-3. Volt-Ampere Curves

Volt-ampere curves show mini-

mum and maximum voltage and

amperage output capabilities of

unit. Curves of other settings fall be-

tween curves shown.
*High inductance connection.

A. *CC Mode

B. CV Mode

va_curve1 − 4/95 − 168 916 / 168 917

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