Output welding current is available in three overlapping ranges by means of externally connecting the electrode cables to the Min., Med., or Max. tap electrode studs(See Technical Specifications in the Installation Section).
Input Line Voltage Compensation maintains a reasonably constant output within a range of ±10% change in supply line voltage.
Cooling of the welder is accomplished by drawing air in through the louvered case front panel, through the reactor and transformer assemblies, and out the louvered case rear panel. The two totally enclosed fan motors used have sealed ball bearings and require no lubrication maintenance.
Handling of the welder and any attached devices should be done with a fork-lift or pallet-jack capable of loads exceeding the combined weight of the system.
Overload/Thermal Protection is provided in three areas: the 115 volt AC auxiliary power is fused for 8 amps; the saturable reactor control power circuit is protected by a 40 amp fuse; the welder output power circuit is protected by the familiar current transformerKlixon thermostat breaker. In the event of a control circuit or welder overload, the output contactors will open and the fan motors will continue to operate. If the overload is detected by the thermostatic breaker, the temperature light located on the front panel will illuminate until a safe operating temperature is reached.
Output Contactor control is provided by two S78 contactors connected in parallel. Input line contactors are not provided. The customer is expected to provide line starting and circuit breaking equipment.