The Thermal Arc Model LT300 are single or three-phase DC arc welding
power sources with Constant Current (CC) output characteristics.
The LT300 unit is equipped with a built-in Sloper, Pulser, gas control
solenoid, lift arc starter, and a high-frequency arc starter for use with Gas
Tungsten Arc Welding (GTAW), Gas Tungsten Arc Welding-Pulsed
(GTAW-P), Gas Tungsten Arc Welding-Sloped (GTAW-S), Gas Tungsten
Arc Welding-TIG Spot (GTAW-TIG), and Shielded Metal Arc Welding