2-2
S
PECIFICATIONS
Service Manual
INTRODUCTION
The Powermax350 plasma cutting system uses a chopper power supply to cut mild steel, stainless steel,
aluminum and other metals. Cylinder air or shop air is used as the plasma gas. Air used for plasma cutting must
be clean, dry and oil-free.
This service manual provides information for a qualified service technician to maintain and troubleshoot the
power supply and torch. This manual also provides a detailed list of safety practices so that the system can be
safely operated and maintained. READ THE SAFETY SECTION (Section 1) FIRST!
The Powermax350 operator manual provides the setup and daily operating instructions.
SPECIFICATIONS
Power Supply
Rated Open Circuit Voltage (OCV) (U
0
) ........................ 255 VDC
Rated Output Current (I
2
) .............................................. 17–27 amps
Full Rated Output .......................................................... 27 amps at 91 VDC at 104
°
F (40
°
C)
Duty Cycle (X) at 40
°
C, at rated output
voltage (U
2
), and at rated output current (I
2
) ................. 35% (I
2
=27A, U
2
=91V)
60% (I
2
=21A, U
2
=88V)
100% (I
2
=17A, U
2
=87V) See power supply data
tag for more information on duty cycle.
Ambient Temperature and Duty Cycle .......................... Power supplies will operate b14
°
and
104
°
F (-10
°
and +40
°
C). Power supplies
operated in an ambient temperature above
86
°
F (30
°
C) may show some decrease in
duty cycle.
Apparent Input Power (S
1
) ............................................ 3.8 kVA
(U
1
I
1
)
Input Voltage (U
1
)/Input Current (I
1
)
at 2.25 kw Output .......................................................... 115/230V/33.3/17.8A 1-Phase, 60 Hz (Non CE)
115/230V/33.3/17.8A 1-Phase, 50 Hz (CE)
200V/18.5A 1-Phase, 50/60 Hz (Non CE)
Dimensions and Weight:
Depth ............................................................................. 15.75 inches (400 mm)
Width ............................................................................. 8.5 inches (216 mm)
Height ............................................................................ 12 inches (305 mm)
Weight ........................................................................... 44 pounds (20 kg)
47 pounds (21.4 kg) with torch
Gas Requirements:
Gas Type ....................................................................... Air - clean, dry, oil-free
Supplied Air Pressure and Flowrate .............................. 70 –120 psi (4.8 –8.3 bar) @ 270 scfh/4.5 scfm
(127 l/min) supplied to power supply pressure
regulator.
Power Supply Pressure Regulator Setting .................... 60 psi (4.1 bar) flowing
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