Introduction; System Description; Technical Symbols Explanation - USAG 998 140A Manual Del Usuario

Frequently inspect the primary power cable for damage or cracking of the cover and replace immediately damaged cable.
Disconnect power supply cable from mains before replacing cables or before removing unit covers.
Always replace any damaged parts of the unit, with original material.
Never short out or in any other way defeat the safety interlock devices and make sure that the power supply line is equipped
with an efficient earth plug.
Make sure that the work table is connected to a good earth ground.
Any maintenance is to be carried out by qualified personnel only that is to be aware of the risks due to dangerous voltages
necessary for the operation of the unit.
1.2.6 Pacemaker
Person wearing electronic life support devices (such as pacemaker) should consult with their doctor before going near arc
welding, cutting, gouging or spot welding operations in order to make sure that magnetic fields associated with high
currents do not affected their devices.
SECTION 2 --- GENERAL DESCRIPTIONS AND PRODUCT

2.1 INTRODUCTION

The welding power supplies deliver constant current and are designed with INVERTER technology using components
having high performance and high reliability and can use for stick electrode and TIG welding.

2.2 SYSTEM DESCRIPTION

The power supply is built on a single main board with the control logics on separate interchangeable hybrid boards which give the system
a very high degree of reliability and simplify maintenance and service.
The power module uses an INVERTER working at a frequency higher than 80 kHz with a very low dynamic response time (500
millisecond) resulting in an extremely smooth welding characteristic which gives easier starting, more homogeneous droplet size, better
penetration and smoother bead appearance.

2.3 TECHNICAL SYMBOLS EXPLANATION

 IEC 974
The power supply is manufactured according to these
 EN60974
international standards.
 S/N/........
Serial number to be stated for any question relating to the unit.


Dropping characteristic.
 SMAW
Suitable for welding with coated electrodes.
 TIG
Suitable for TIG welding.
 U
Secondary no-load voltage.
°
 X
Duty-factor percentage.
The duty-factor expresses the percentage of 10 minutes in which the power supply can operate at a
given current
without overheating.
 I
Welding current.
2
 U
Secondary voltage with welding current I
2
 U
Nominal supply voltage.
1
 1 50/60 Hz
Single phase supply 50 or 60 Hz.
 I
Absorbed current at the corresponding welding current I
1
welding, divide I
1
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SPECIFICATIONS
Single phase stating frequency converter-transformer-rectifier.
.
2
. When using the power supply for TIG
2
15