Operating Instructions

Safety Precautions

WARNING

ELECTRIC SHOCK can kill.

•Have an electrician install and service this equipment.

•Turn the input power off at the fuse box before working on equipment.

•Do not touch electrically hot parts.

•This next section applies to CV 500-I’s without the Capacitor Discharge Option:

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When using a CV 500-I power source with wire feed- ers, there will be a small spark if the electrode con- tacts the work or ground within several seconds after releasing the trigger.

When used with some wire feeders with the electrical trigger interlock in the ON position, the arc can restart if the electrode touches the work or ground during these several seconds.

POWER SOURCE OPERATION

Duty Cycle and Time Period

The CV 500-I is rated at the following duty cycles:

Duty Cycle*	Amps	Volts

100%	400	36
60%	450	38
50%	500	40

*Based upon a 10 minute time period. (i.e., for 60% duty cycle, it is 6 minutes on and 4 minutes off).

Overloading the power source may result in opening of an internal protective thermostat as indicated by the amber thermal protection light turning on.

STARTING THE MACHINE

The POWER toggle switch at the extreme right side of the control panel in the “ I “ position energizes and closes the three phase input contactor from a 115 volt auxiliary transformer. This in turn energizes the main power transformer.

The machine is de-energized when the POWER switch is in the “0” position.

The white light next to the POWER switch indicates when the input contactor is energized.

CONTROL SETTINGS & DESCRIPTIONS

OUTPUT VOLTAGE CONTROL DIAL

The Output control dial at the right of the control panel is a continuous control of the machine output voltage. The control may be rotated between minimum and maximum to adjust the machine output, even while welding.

The machine is equipped with line voltage compensa- tion as a standard feature. This will hold the output constant except at maximum output of the machine, through a fluctuation of ±10% input line voltage.

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