SERVICE MANUAL
FABRICATOR 251
August 22, 2008
2-3
2.08 Duty Cycle
The
r
ated duty cycle of a welding Powe
r
Supply is the ope
r
ating time it may be used at its
r
ated output cu
rr
ent without
exceeding the tempe
r
atu
r
e limits of the insulation of the component pa
r
ts. To explain the ten minute duty cycle pe
r
iod
the following example is used. Suppose a welding Powe
r
Supply is designed to ope
r
ate at 60% duty cycle, 250
ampe
r
es at 26.5 volts. This means that it has been designed and built to p
r
ovide the
r
ated ampe
r
age (250A) at the
r
ated load voltage (26.5V), fo
r
6.0 minutes out of eve
r
y 10 minute pe
r
iod (60% of 10 minutes is 6.0 minutes). Du
r
ing
the othe
r
4.0 minutes of the 10 minute pe
r
iod the Powe
r
Supply must idle and be allowed to cool. The the
r
mal cutout
will ope
r
ate if the duty cycle is exceeded.
2.09 Specifications
Gun Catalog Numbe
r
43340VNG
Gun Type
Valley National Gases 400 Amp
Gun Cable Length
15 ft (4.5m)
MIG Gun Specifications
Table 2-2: MIG Gun Specifications
Cont
r
ol Ci
r
cuit Supply
Wi
r
e D
r
ive Moto
r
Supply
Wi
r
e Diamete
r
.023"
(0.6mm)
.030"
(0.8mm)
.035"
(0.9mm)
.045"
(1.2mm)
Mild Steel:
Y
Y
Y
Y
Stainless Steel:
Y
Y
Y
Y
Aluminum:
Y
Y
Y
Flux Co
r
ed:
Y
Y
Y
Wi
r
e Spool Size Capacity
80 to 800 ipm
(2 to 20 m/min)
44 lb, 33 lb, 10 lb, 8" and 12" wi
r
e spool sizes.
Wire Drive Specifications
Wi
r
e Speed Range
30VA @ 24VAC
180VA @ 14 to 46VDC
Table 2-3: Wi
r
e D
r
ive Specifications
Содержание FABRICATOR 251
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