ESAB Heliarc 250 AC/DC Power Supply for 50 HZ. Service Troubleshooting instruction

Supplement To Form 15-047

Heliarc 250 AC/DC POWER SUPPLY

for 50 HZ. SERVICE

ESAB P/N 31320

I. GENERAL

This supplement covers the Heliarc 250 AC/DC Power
Source with "power factor correction" specifically de­signed for 220/380/415 Volt -- 50 Hertz service. It is
identical to the standard Heliarc 250 AC/DC (P/N 31310)
unit covered in Form 15-047 except for the following:

IMPORTANT

As shipped from the factory, all 50 Hz units are hooked­up to operate from a 415 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 31318 replaces P/N

31313.
Terminal Board Assy. (TB) - P/N 680434 replaces P/
N 680047.
Fan Motor (FM) - P/N 2062301 replaces P/N 2062340.

II. Form 15-047 is applicable to this unit except

as follows:

A. Revised Specification following:

Rated Output@ 250 Amps @ 30 Volts
40% Duty Cycle AC/DC, Tig/Stick
Open Circuit Voltage 79 Volts AC/72 Volts DC
Output Welding Current AC/DC
Current Low Range 5 to 60 Amps
Range in High Range 15 to 320 Amps
Amperes

Input Voltage 220/380/415 VAC,

1 Ph., 50 Hz.
Input Current @ Voltage 220 380 415
Rated Load in Amps Full Load 78 47 38
Power Factor @ Rated Load Approx. 76%
Auxiliary Power Output 115 VAC, 15 Amp., 50 Hz.
Dimensions: Width 16-inches 406 mm

Depth 30-inches 762 mm
Height 22-inches 559 mm

Weight 385 lbs. 175 kg

L-TEC P/N 35623

F-15-049

March, 1995

Revised Table for Recommended Input Conductors
and Line Fuses.

Input Requirements Input & Gnd. Time-Delay

Volts Amps. CU/AWG Amps.
220 78 3 125
380 47 8 70
415 38 8 60

C. Primary Voltage Changeover Connections

As mentioned previously, the primary windings of the
main transformer are factory connected for 415 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.

220

2

1

3

380

415

220

220

380

415

7

Voltage Changeover Terminal Board (TB)

D. Wiring Diagram -- Use revised portions contained

herein.

E. Schematic Diagram -- Use revised portions con-

tained herein.

Conductor Fuse Size

L1

Customer's Input
Cable Connection

L2

I Double Links Provided

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