Tweco 42 CutMaster Operating Manual - Manual (Page 10)

CUTMASTER 42
Manual 0-5141 2-1 INTRODUCTION
SECTION 2 SYSTEM: INTRODUCTION
2.01 Working Principle
Rectifier
Inverter Transformer Rectifier
Reduce pressure, filter Gas valve Cutting torch
Workpiece
Compressed air
Art # A-09204_AB
2.02 Power Supply Specifications
CUTMASTER 42 Power Supply Specifications
Input Power 120 VAC (+-10%), 1Phase, 50/60Hz
208-230 VAC (+-10%), 1Phase, 50/60Hz
Output Current 20 Amps @ 120VAC, 15A
20-27 Amps @ 120VAC, 20A
20-40 Amps @ 230VAC, 20A
CUTMASTER 42 Power Supply Duty Cycle (Note 1)
Ambient Temperature 104° F (40° C)
Duty Cycle 30% @ 120VAC, 40% @ 230VAC
Rated Current 27 Amps @ 120VAC, 40 Amps @ 230V
SL40 Torch Gas Requirements (see section 2T.03)
Notes
1. Duty Cycle is the percentage of time the system can be operated without overheating. Duty cycle is re-
duced if primary input voltage (AC) is low or the DC voltage is higher than shown in this chart.
2. Air supply must be free of oil, moisture, and other contaminants. Excessive oil and moisture may cause
double-arcing, rapid tip wear, or even complete torch failure. Contaminants may cause poor cutting perfor-
mance and rapid electrode wear. Optional filters provide increased filtering capabilities.
NOTE
IEC Rating is determined as specified by the International Electro-Technical Commission. These
specifications include calculating an output voltage based upon power supply rated current. To facilitate
comparison between power supplies, all manufacturers use this output voltage to determine duty cycle.
TDC Rating is determined using an output voltage representative of actual output voltage during cutting
with a TDC torch. This voltage may be more or less than IEC voltage, depending upon choice of torch,
consumables, and actual cutting operation.