Tweco 300 ACDC Arcmaster - Manual (Page 18)

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SECTION 2. INTRODUCTION AND DESCRIPTION
2.01 Description
The Thermal Arc TM ARC MASTER 300 AC/DC is a self contained three-phase AC/DC arc welding power source with
Constant Current (CC) output characteristics. This unit is equipped with a Digital Volt/Amperage Meter, gas control
valve, built in Sloper and Pulser, lift arc starter, and 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), and
Shielded Metal Arc Welding (SMAW) processes. The power source is totally enclosed in an impact resistant, flame
retardant and non-conductive plastic case.
300A 5A (A)
(V)
OCV
STICK Process
300A 25A (A)
(V)
OCV
10V
30 0A (A)
(V)
OCV
5A
LIFT TIG Process HF TIG Process
Figure 2-1. Model 300 AC/DC Volt-Ampere curve
Note
Volt-Ampere curves show the maximum Voltage and Amperage output capabilities of the welding
power source. Curves of other settings will fall between the curves shown.