Tweco 300 MST Arcmaster - Manual (Page 16)

10
2.0 INTRODUCTION AND DESCRIPTION
2.01 Description
The Thermal Arc™ ARC MASTER 300 MST is a single & three-phase DC arc welding power source with Constant
Current (CC) and Constant Voltage (CV) output characteristics. This unit is equipped with a Digital Volt/Amperage, lift
arc starter for use with Gas Tungsten Arc Welding (GTAW), Arc Control and Hot Start for Shielded Metal Arc Welding
(SMAW), Inductance Control for Gas Metal Arc Welding (GMAW) processes. The power source is totally enclosed in
an impact resistant, flame resistant and non-conductive plastic case.
300A 5A
(V)
OCV
18V
320A
16 0A
STICK Process
300A 25 A (A)
(V)
OCV
10 V
5A (A)
(V)
OCV
10V
320A
29V
30 0A
LIFT-TIG Process MIG Process
Figure 1. Model 300 MST Volt-Ampere Curve
Note 1
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.