ESAB Heliarc 250 AC/DC Power Sources for 230/460/575 Volt Service Troubleshooting instruction
Supplement to Form 15-047
Heliarc® 250 AC/DC POWER SOURCES
for 230/460/575 VOLT SERVICE
Without Power Factor, P/N 31305; With Power Factor, P/N 31315
F-15-048
May, 1995
F-15-048
I. General
This supplement covers the HELIARC 250 AC/DC and Power
Sources with and without “power factor correction” specifically designed for 230/460/575 Volt — 60 Hertz service. They
are identical to their respective HELIARC 250 AC/DC units
(w/o pf - P/N 31300 and w/pf - P/N 31310) covered in Form
15-047 except for the following:
IMPORTANT: As shipped from the factory, all units are
hooked-up to operate from a 575 volt input. If your input requirements do not
match the factory-shipped provision, the
following data should be heeded:
— You must change the input terminal board (TB) voltage
links to match your actual primary input voltage - as
described in Section II-C of this supplement.
A. Replacement Parts
Main Transformer (MTR) - P/N 31303 replaces P/N 31313.
Terminal Board Assy. (TB) - P/N 680424 replaces P/N 680047.
II. Form 15-047 is applicable to this unit except as
follows:
A. Revised Specification following.
SPECIFICATIONS
Rated Output @
40% Duty Cycle
Open Circuit Voltage 79 Volts AC/72 Volts DC
Output
Current
Range In
Amperes
Welding Current
Low Range
High Range
250 Amps @ 30 Volts
AC/DC, Tig/Stick
AC/DC
5 to 60 Amps
15 to 320 Amps
B. Revised Table for Recommended Input Con-
ductors and Line Fuses.
Recommended Sizes for
Input Conductors and Line Fuses
Input Requirements Input & Gnd. Time-Delay
Conductor K Fuse Size
Volts Amps CU/AWG Amps
Units Without Power Factor Correction.
230 100 No. 2 150
460 50 No. 6 70
575 40 No. 8 60
Units With Power Factor Correction
230 74 No. 4 110
460 37 No. 8 60
575 30 No. 8 45
K Sized per National Electric Code for 75° C rated conductors @ 30° C ambient. Not
more than three conductors in raceway or cable. Local codes should be followed if
they specify sizes other than those listed above.
C. Primary Voltage Changeover Connections
As mentioned previously, the primary windings of the main
transformer are factory connected for 575 volt operation.
These connections are made by using reconnectable links
on the voltage changeover terminal board for the main transformer. This unit’s terminal board (illustrated following) is
silkscreened to show the available primary voltage connections which can be used.
230
Customer’s Input
Cable Connection
Input Voltage 230/460/575 VAC,
Input Current @ Voltage 230 460 575
Rated Load in
Amperes
Power Factor
@ Rated Load
Auxillary Power Output 115 VAC, 15 Amp, 60 Hz.
Dimensions Width
Weight 385 lbs 175 kg
*P.F.C. indicates with or without power factor correction.
w/0 P.F.C.*
w/P.R.C.*
w/o P.F.C.*
w/P.F.C.*
Depth
Height
1 Ph., 60 Hz.
100
74
Approx. 52 %
Approx. 76%
16-inches
30-inches
22-inches
50
37
40
30
406 mm
762 mm
559 mm
Be sure this information reaches the operator.
You can get extra copies through your supplier.
460
575
230
230
460
575
Double Links
▲
Provided
Voltage Changeover Terminal Board (TB)
D. Wiring Diagram — Use revised portions contained
herein.
E. Schematic Diagram — Use revised portions con-
tained herein.
D-31306
Schematic Diagram - Heliarc 250 AC/DC, 230/460/575V
2
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