Tweco 400 MSTP Arcmaster - Manual (Page 17)

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2.0 INTRODUCTION AND DESCRIPTION
2.01 Description
The Thermal Arc ™ ARC MASTER 400 MSTP 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.
400A 5A (A)
(V)
OCV
18V
420A
16 0A
STICK Process
400A 25 A (A)
(V)
OCV
10 V
5A (A)
(V)
OCV
10V
480A
36V
40 0A
LIFT-TIG Process MIG Process
Figure 1. Model 400 MSTP 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.