10
1.1 General Description, Purpose and Fea-
tures. The PowerMTS, is a CV/CC power
source capable of 5 different welding pro-
cesses at a 60% duty cycle at the full rated
power while connected to 460V 3 phase. Op-
eration in 220V 1 phase is limited to 250
amps, but is rated at 100% duty cycle at the
full 250 amps. Each process can be inde-
pendently selected. The following processes
are included on the PowerMTS series.
1) GMAW (MIG) with a standard, independent
feeder with a 4 roll heavy duty drive sys-
tem included. Includes advanced crater fill
amps and volt control in 4T, and induct-
ance control for higher quality welds.
2) FCAW (Flux Core) with a special setting on
the machine that includes improved opera-
tion and arc stability with flux cored weld-
ing wires.
3) GTAW (TIG) offers simple DC scratch start
operation includes a standard gas valve
torch. (17V compatible). Note: Unit is DC
scratch start only. No HF or LIFT start.
4) SMAW (Stick) offers excellent hot start
performance on difficult cellulose rods
such as ER 6010 and ER 6011 to prevent
sticking. Arc force control increase per-
formance, and improves out of position
welding characteristics. Smooth spatter
free welds are easily obtained on ER 7018,
309L, and many specialty rods.
5) ACAC (Carbon Arc) Allows the customer
up to 400 amps of cutting and gouging
power with a dedicated setting that pro-
vides improved performance over regular
SMAW settings. Arc force control should
be turned up to maximum to increase
gouging performance.
1.2 Basic Design and Construction. The
PowerMTS series utilizes soft switching IGBT
inverter technology. The unit can operate on
either 220/240V 1 phase power or on 460/480
V 3 phase power, allowing the welder to be
used in many places and circumstances. For
those not familiar with inverter design, the
basic principle is as follows (see following dia-
gram): Input power is rectified by the rectifier,
then inverted to high frequency AC, then
stepped down by the high frequency trans-
former, rectified again and filtered by the high
frequency rectifier, which outputs directly to
stable DC power suitable for welding. The
basic design and construction of the inverter
reduces size, weight, and power consumption,
while increasing arc stability.
1.3 Volt/Amp Curve. The function of the CC/CV
PowerMTS offers improved volt amp curves
for more control and quicker response over
what can be offered by many transformer
based welders.
1.4 Installation. The basic construction of the
PowerMTS is rugged and durable, ideal for
many locations and use. Critical components
are protected by coatings and heavy potting to
make the welder environmentally resistant.
However, some care and common sense
should be taken to make sure that the welder
offers the safest and best performance.
Please note the following items regarding safe
operation:
1) Do not use the welder in damp or wet are-
as. Perspiration and other forms of water
in contact with the body can increase the
risk of electrocution.
2) Do not use the welder in extreme corrosive
environments. To maintain optimum power
transfer, check main connections, clamps
and cables frequently to ensure that com-
ponents are not corroded. Excessive cor-
rosion and oxidation can result in an unsta-
ble arc and heat build-up.
Figure 1.2.1
CV Volt/Amp Curve
CC Volt/Amp Curve
Introduction and Specifications
Section 1
Figure 1.3.1
