ESAB LAW 420 User manual

Valid for serial no. 912--xxx--xxxx0458 133 001 011109

LAW 420, LAW 520,

LAW 420W, LAW 520W

Bruksanvisning

Brugsanvisning

Bruksanvisning

Käyttöohjeet

Instruction manual

Betriebsanweisung

Manuel d’instructions

Gebruiksaanwijzing

Instrucciones de uso

Istruzioni per l’uso

Manual de instruções

Ïäçãßåò ÷ñÞóåùò

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Rätt till ändring av specifikationer utan avisering förbehålles.

Ret til ændring af specifikationer uden varsel forbeholdes.

Rett til å endre spesifikasjoner uten varsel forbeholdes.

Oikeudet muutoksiin pidätetään.

Rights reserved to alter specifications without notice.

Änderungen vorbehalten.

Sous réserve de modifications sans avis préalable.

Recht op wijzigingen zonder voorafgaande mededeling voorbehouden.

Reservado el derecho de cambiar las especificaciones sin previo aviso.

Ci riserviamo il diritto di variare le specifiche senza preavviso.

Reservamo--nos o direito de alterar as especificações sem aviso prévio.

Äéáôçñåßôáé ôï äéêáßùìá ôñïðïðïßçóçò ðñïäéáãñáöþí ×ùñßò ðñïåéäïðïßçóç.

SVENSKA 3..............................................

DANSK 10................................................

NORSK 17................................................

SUOMI 24................................................

ENGLISH 31..............................................

DEUTSCH 38.............................................

FRANÇAIS 46.............................................

NEDERLANDS 53.........................................

ESPAÑOL 61..............................................

ITALIANO 69..............................................

PORTUGUÊS 77..........................................

ÅËËÇÍÉÊÁ 84.............................................

ENGLISH

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TOCe

1 DIRECTIVE 32........................................................

2SAFETY 32...........................................................

3 INTRODUCTION 32...................................................

4 TECHNICAL DATA 33.................................................

5 INSTALLATION 34....................................................

5.1 Assembly of components 34..................................................

5.2 Electrical installation 35.......................................................

5.3 Mains supply 36..............................................................

6 OPERATION 36.......................................................

6.1 Controls and connections 36...................................................

7 MAINTENANCE 37....................................................

7.1 Topping up coolant 37.........................................................

8 ORDERING OF SPARE PARTS 37......................................

DIAGRAM 92............................................................

SPARE PARTS LIST 97...................................................

ACCESSORIES 108.......................................................

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1 DIRECTIVE

DECLARATION OF CONFORMITY

ESAB Welding Equipment AB, S--695 81 Laxå, Sweden, gives its unreserved guarantee that welding

power source LAW 420/520 -- 420/520W from serial number 912 complies with standard IEC/EN

60974--1, in accordance with the requirements of directive (73/23/EEC) and addendum (93/68/EEC)

and with standard EN 50199 in accordance with the requirements of directive (89/336/EEC) and add-

endum (93/68/EEC).

-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --------

Paul Karlsson

Managing Director

Esab Welding Equipment AB

695 81 LAXÅ

SWEDEN Tel: + 46 584 81000 Fax: + 46 584 12336

Laxå 1999--04--22

2SAFETY

WARNING

READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.

ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND OTHERS. TAKE PRECAU-

TIONS WHEN WELDING. ASK FOR YOUR EMPLOYER’S SAFETY PRACTICES WHICH SHOULD BE

BASED ON MANUFACTURERS’ HAZARD DATA.

ELECTRIC SHOCK -- Can kill

SInstall and earth the welding unit in accordance with applicable standards.

SDo not touch live electrical parts or electrodes with bare skin, wet gloves or wet clothing.

SInsulate yourself from earth and the workpiece.

SEnsure your working stance is safe.

FUMES AND GASES -- Can be dangerous to health

SKeep your head out of the fumes.

SUse ventilation, extraction at the arc, or both, to take fumes and gases away from your breathing zone

and the general area.

ARC RAYS -- Can injure eyes and burn skin.

SProtect your eyes and body. Use the correct welding screen and filter lens and wear protective

clothing.

SProtect bystanders with suitable screens or curtains.

FIRE HAZARD

SSparks (spatter) can cause fire. Make sure therefore that there are no inflammable materials nearby.

NOISE -- Excessive noise can damage hearing

SProtect your ears. Use earmuffs or other hearing protection.

SWarn bystanders of the risk.

MALFUNCTION -- Call for expert assistance in the event of malfunction.

PROTECT YOURSELF AND OTHERS!

3 INTRODUCTION

The LAW 420, 420W, 520 and 520W are 6--pulse thyristor rectifiers designed for

semi--automatic welding.

Both rectifiers are fan--cooled and equipped with thermal overload protection.

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4 TECHNICAL DATA

LAW 420/420W LAW 420/420W

Voltage 400--415V, 3∼50Hz

230/400--415/500V, 3∼50Hz

230/440--460V, 3∼60Hz

Permissible load at

100% duty cycle 280 A/28 V 280 A/28 V

60% duty cycle 350 A/32 V 350 A/32 V

45% duty cycle 400 A/34 V 400 A/34 V

Setting range (DC) 40 A/16 V--400 A/34 V 40 A/16 V--400 A/34 V

Open circuit voltage 53--58 V 53--58 V

Open circuit power 590/790W 640/840W

Efficiency 0,74 0,76

Power factor 0,86 0,84

Control voltage 42 V, 50/60 Hz 42 V,50/60 Hz

Enclosure class IP 23 IP 23

Weight kg 200/214 201/215

Dimensions lxbxh 800x640x835 800x640x835

Application classification

LAW 520/520W LAW 520/520W

Voltage 400--415V, 3∼50Hz

230/400--415/500V, 3∼50Hz

230/440--460V, 3∼60Hz

Permissible load at

100% duty cycle 400 A/34 V 390 A/33,5 V

80% duty cycle 450 A/37 V 435 A/36 V

60% duty cycle 500 A/39 V 500 A/39 V

Setting range (DC) 40 A/16 V--500 A/39 V 40 A/16 V--500 A/39 V

Open circuit voltage 53--60 V 53--60 V

Open circuit power 670/870 W 720/920 W

Efficiency 0,78 0,78

Power factor 0,90 0,90

Control voltage 42 V, 50/60 Hz 42 V,50/60 Hz

Enclosure class IP 23 IP 23

Weight kg 225/239 227/241

Dimensions lxbxh 800x640x835 800x640x835

Application classefication

These welding power sources conform to the requirements of IEC 974--1.

Duty cycle

The duty cycle refers to the time as a percentage of a ten--minute period that you can weld at a cer-

tain load without overloading the welding power source.

Enclosure class

The IP code indicates the enclosure class, i. e. the degree of protection against penetration by solid

objects or water. Equipment marked IP 23 is designed for indoor and outdoor use.

Application class

The symbol indicates that the power source is designed for use in areas with increased

electrical hazard.

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5 INSTALLATION

The installation must be executed by a professional.

The power supply should be lifted by means of its lifting

eye. The handle is only intended for pulling it along the

ground.

Lifting instructions

WARNING!

This product is intended for industrial use. In a domestic environment this product may cause radio

interference. It is the user’s responsibility to take adequate precautions.

IMPORTANT

SPlace the welding power source in a suitable place and make sure the welding

rectifier is not covered or set--up so that cooling is prevented.

SMake sure the welding rectifier is connected to the correct mains voltage.

Earth according to applicable directives.

SConnect the power supply lead using the appropriate fuse in conformance with

local regulations.

Power supply lead complies to Swedish electrical regulations.

5.1 Assembly of components

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5.2 Electrical installation

ba11d002

LAW420/420W 4x10mm@

LAW520/520W 4x16mm@

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5.3 Mains supply

LAW 420 3∼50 Hz 3∼50 Hz 3∼50 Hz 3∼60Hz 3∼60Hz

Voltage V 230 400--415 500 230 440--460

Current A

100% 39 23 19 37 22

60% 47 28 22 45 27

45% 51 31 25 51 30

Mains lead rating 4x10 4x4 4x4 4x10 4x4

Fuse, slow A 35 25 20 35 20

LAW 520 3∼50 Hz 3∼50 Hz 3∼50 Hz 3∼60Hz 3∼60Hz

Voltage V 230 400--415 500 230 440--460

Current A

100% 59 35 27 56 33

80% 63 39 29 61 37

60% 69 41 33 69 42

Mains lead rating 4x16 4x6 4x6 4x16 4x6

Fuse, slow A 63 35 35 50 25

6 OPERATION

General safety regulations for the handling of the equipment can be found on

page 32. Read through before you start using the equipment!

6.1 Controls and connections

SA-- On/Off mains supply.

SB-- On/Off cooling unit (LAW 420W/520W)

SC-- Mains indicator lamp

SD-- Thermal overload warning lamp,

lights up in case of overheating

SE-- Welding socket, + terminal

SF-- Inductance socket, -- terminal

SG-- Inductance socket, -- terminal

SH-- Space for digital meters (optional)

SJ-- Automatic fuse 42 V AC--circuit

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There is a risk of tipping if the wire feed cabinet is fitted with a counterbalance arm. Secure the

equipment, especially if used on an uneven or sloping surface.

Limit the angle of rotation of the wire feed cabinet using the straps supplied.

When moving the equipment, do NOT pull on the torch.

WARNING!

7 MAINTENANCE

Note:

All warranty undertakings given by the supplier cease to apply if the customer

attempts to rectify any faults on the machine during the warranty period.

The power source should be regularly blown clean using dry compressed air at

reduced pressure. More frequently in dirty environments.

Otherwise the air inlet/outlet may become blocked and cause overheating.

7.1 Topping up coolant

Mix: 50 % water 50 % glycol

8 ORDERING OF SPARE PARTS

Spare parts are ordered through your nearest ESAB representative, see back cover.

When ordering spare parts, please state machine type and number as well as desig-

nation and spare part number as shown in the spare parts list.

This will simplify dispatch and ensure you get the right part.

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