Tweco 251 Thermal Arc Fabricator - Manual (Page 20)

FABRICATOR 251
INTRODUCTION 2-4 Manual No. 0-4847
Package System Part Number
Power Source Part Number
Power Source Weight
Power Source Dimensions HxWxD
(including wheels and cylinder carrier)
Nominal Input Voltage 208V 230V
Number of Phases
Frequency
Flexible Supply Cable Size
Supply Plug
Rated Input Current @ 100% Duty Cycle * 36A * 32.6A
Rated kVA @ 100% Duty Cycle 7.5 kVA 7.5 kVA
Maximum Input Current @ 250A Output 68A 62A
Generator Requirements 20 kVA 20 kVA
Supply VA @ Maximum Output 15 kVA 15 kVA
Recommended Primary Circuit Size 50A 50A
Recommended Minimum Primary Fuse Size 50A 50A
Open Circuit Voltage Range 15.6 – 45.9V DC 15.6 – 45.9V DC
Welding Arc Voltage Range 14.5 – 31.7V DC 14.5 – 31.7V DC
Output Current Range 20 – 300A DC 20 – 300A DC
Rated Output Duty Cycle 250A/26.5V @ 60% 250A/26.5V @ 60%
Maximum Duty Cycle 300A/31.7V @ 40% 300A/31.7V @ 40%
100% Duty Cycle Output Rating 195A DC at 24V 195A DC at 24V
Duty Cycle Period
Number of Output Voltage Values
Mild / Stainless Steel
Aluminum
Flux Cored
Wire Feed Speed Range
Wire Spool Size Diameter
Burn-Back Timer Range
Burn-Back Time Factory Set to
Spot Timer Range
Dwell Timer Range
Stitch Weld Time Weld (Stitch) Time
Dwell (non-weld) Time
Thermal Protection
Operating Temperature Range
80 – 800 ipm (2 – 20 m/min )
8” / 12” (200mm / 300mm)
0 – 0.6 seconds
0.16 seconds
0.5 – 9 seconds
1 – 12 seconds
0.5 – 9 seconds
1 – 12 seconds
Self-resetting thermostat fitted to rectifier and
transformer
32° to 104°F (0° to 40°C)
* The Rated Input Current should be used for the determination of cable size & supply
requirements.
.030” (0.8mm) – 1/16” (1.6mm)
10ft (3m) 10AWG
NEMA 6-50P
10 minutes
24
Electrode Wire Type and Diameter
.023” (0.6mm) – .045” (1.2mm)
.030” (0.8mm) – 1/16” (1.6mm)
32” x 27-3/16” x 36-3/4”
(813 x 691 x 933mm)
1Ø
60 Hz
Fabricator 251
100048D-002
707520
227lb (103kg)
Table 2-4: Machine Specifications