ARC Inverter Power Sources Manuel D’Utilisation

All electric shocks are potentially fatal and therefore live wires and/or parts should never be touched. 
Insulation must be kept from the piece to be welded and from the ground by wearing insulation gloves and clothing. 
Garments such as gloves, shoes, hats, clothings and body must be kept dry at all times and it is to be avoided working in humid
or wet areas. 
Never touch or hold the piece to be welded by hand; if the slightest electric shock is felt, welding should be stopped immediately; 
the unit is not to be used until the problem is identified and solved by qualified personnel. 
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. 

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. 

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. 

2.5 TECHNICAL SYMBOLS EXPLANATION 
x

IEC 974                   The power supply is manufactured according to these  

x

EN60974                 international standards. 

x

S/N/........                 Serial number to be stated for any question relating to the unit. 

x

        Single phase stating frequency converter-transformer-rectifier. 

x

                                Dropping characteristic. 

x

SMAW

Suitable for welding with coated electrodes. 

x

TIG                         Suitable for TIG welding. 

x

U

°

                           Secondary no-load voltage. 

x

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. 
x

I

2

                            Welding current. 

x

U

2

                          Secondary voltage with welding current I

2

.

x

U

1

                          Nominal supply voltage. 

x

1

a 50/60 Hz

Single phase supply 50 or 60 Hz. 

x

I

1

                            Absorbed current at the corresponding welding current I

2

. When using the power supply for TIG welding, 

divide I

1

                                    value by 1.6. 
x

IP23                      Grade of protection of metal frame. 

x

S                           Suitable for working in high-risk areas. 

x

NOTE:                   The power supply has been designed to operate in areas with grade 3 pollution (IEC 664). 

The power supply is protected by a device installed in such a way as to act in case of overheating and/or main supply 
anomalies.
When this device intervenes, the unit stops supplying current but the cooling fan keeps working. 
The acting of the device is shown by the LED turning on (4 in figure 2). 
The turning off of the LED signals the resumed ability of the unit to be in operating conditions. 

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