ESAB Parallel connection of LAF-welding power source Instruction manual

Parallel connection of
LAF-welding power source

Instruction manual

0449 546 001 110217

ENGLISH 3..............................................

Rights reserved to alter specifications without notice.

-- 2 --

ENGLISH

1SAFETY 4...........................................................

2 INTRODUCTION 7...................................................

2.1 General 7..................................................................

2.2 Connection instructions for two parallel-connected welding

power sources and one PEK control box 8......................................

3 Location Drawing 9..................................................

3.1 Location drawing - Welding Power Source LAF 631 9............................

3.2 Location drawing - Welding Power Source LAF 1001 10...........................

3.3 Location drawing - Welding Power Source LAF 1251/1601 11......................

4 Connection in Parallel Using Six-Thyristor Operation 12................

DIAGRAM 14............................................................

SPARE PARTS LIST 17..................................................

TOCe

-- 3 --

GB

1SAFETY

Users of ESAB welding equipment have the ultimate responsibility for ensuring that
anyone who works on or near the equipment observes all the relevant safety pre­cautions. Safety precautions must meet the requirements that apply to this type of
welding equipment. The following recommendations should be observed in addition
to the standard regulations that apply to the workplace.

All work must be carried out by trained personnel well-acquainted with the oper­ation of the welding equipment.

Incorrect operation of the equipment may lead to hazardous situations which can
result in injury to the operator and damage to the equipment.

1. Anyone who uses the welding equipment must be familiar with:

S its operation
S location of emergency stops
S its function
S relevant safety precautions
S welding

2. The operator must ensure that:
S no unauthorised person is stationed within the working area of the

equipment when it is started up.

S no-one is unprotected when the arc is struck

3. The workplace must:

S be suitable for the purpose
S be free from draughts

4. Personal safety equipment
S Always wear recommended personal safety equipment, such as safety

glasses, flame-proof clothing, safety gloves. Note! Do not use safety

gloves when replacing wire.

S Do not wear loose-fitting items, such as scarves, bracelets, rings, etc.,

which could become trapped or cause burns.

5. General precautions

S Make sure the return cable is connected securely.
S Work on high voltage equipment may only be carried out by a qualified

electrician.

S Appropriate fire extinquishing equipment must be clearly marked and close

at hand.

S Lubrication and maintenance must not be carried out on the equipment

during operation.

SafeArcW GB

-4-

GB

WARNING

ARC WELDING AND CUTTING CAN BE INJURIOUS TO YOURSELF AND
OTHERS. TAKE PRECAUTIONS WHEN WELDING. ASK FOR YOUR
EMPLOYER'S SAFETY PRACTICES WHICH SHOULD BE BASED ON MANU­FACTURER'S HAZARD DATA.

ELECTRIC SHOCK - Can kill

S Install and earth the welding unit in accordance with applicable standards.
S Do not touch live electrical parts or electrodes with bare skin, wet gloves or wet

clothing.

S Insulate yourself from earth and the workpiece.
S Ensure your working stance is safe.

FUMES AND GASES - Can be dangerous to health

S Keep your head out of the fumes.
S Use ventilation, extraction at the arc, or both, to keep fumes and gases from

your breathing zone and the general area.

ARC RAYS - Can injure eyes and burn skin

S Protect your eyes and body. Use the correct welding screen and filter lens and

wear protective clothing.

S Protect bystanders with suitable screens or curtains.

FIRE HAZARD

S Sparks (spatter) can cause fire. Make sure therefore that there are no inflam-

mable materials nearby.

NOISE - Excessive noise can damage hearing

S Protect your ears. Use ear defenders or other hearing protection.
S Warn bystanders of the risk.

MALFUNCTION

S Call for expert assistance in the event of malfunction.

SafeArcW GB

READ AND UNDERSTAND THE INSTRUCTION MAN­UAL BEFORE INSTALLING OR OPERATING.

PROTECT YOURSELF AND OTHERS!

-5-

GB

CAUTION!

Class A equipment is not intended for use in residential locations where
the electrical power is provided by the public low-voltage supply system.
There may be potential difficulties in ensuring electromagnic
compatibility of class A equipment in those locations, due to conducted
as well as radiated disturbances.

WARNING!

Read and understand the instruction
manual before installing or operating.

Do not dispose of electrical equipment together with normal waste!

In observance of European Directive 2002/96/EC on Waste Electrical and Electronic
Equipment and its implementation in accordance with national law, electrical equipment
that has reached the end of its life must be collected separately and returned to an
environmentally compatible recycling facility. As the owner of the equipment, you should
get information on approved collection systems from our local representative.

By applying this European Directive you will improve the environment and human health!

CAUTION!

The welding power source and control box PEH can't be used together.

SafeArcW GB

-6-

GB

2 INTRODUCTION

2.1 General

Connection in parallel can be done with all sizes of the LAF welding power source.
The current outlet from each welding power source depends on its size, see below.

The mains connection is to be done in the
same way for Master and Slave.

It is possible to use the so-called six-thyristor
effect by inverting the primary terminal of the
main transformer, see page 12.

Master Slave

Connection in Parallel of Welding Power Sources
oftheSameSize

Master

Slave

Connection in Parallel of Welding Power Sources
of Different Size

When the welding power sources are of different size
the smallest one is to be Master.

Master

Slave

Current Outlet for Welding Power Sources of the Same Size

If the power sources are of the same size the current outlet will be evenly distributed.

*1 Max = 1600 A
*2 500+500 = 1000 A

Master 500 A Slave 500 A

Current Outlet for Welding Power Sources of Different Sizes

If the Welding power sources are of different sizes the current outlet will be
procentually evenly distributed.

*1 Max = 1000+600= 1600 A
*2 500+300 = 800 A

Master 500 A

-7-

hga7d1ea

Slave 300 A

GB

2.2 Connection instructions for two parallel-connected welding
power sources and one PEK control box

1. Emergency stop coil W01, is connected together with the enclosed contact block,

which in turn has been fitted on KM2, in accordance with the diagram on page
14 (automatic welding machine) or page 15 (automation).

2. On the welding power source defined as Slave CN18 (pin 1 and 2), on AP1, shall

be clamped for analogue control.

3. Start up both welding power sources and connect ESAT to the Master welding

power source.

4. Set parameter 762 to 1, Master searches for the welding power source selected

as Slave.

5. Set parameter 767 to 10, Node address on the welding power source selected

as Slave.

6. Move the ESAT connection to the welding power source defined as Slave.

7. Set parameter 10 to 16, Slave function.

8. Set parameter 67 to 0, with value 1 so the welding power source expects an

analogue signal.

9. Set parameter 712 to 0, the wire feed is not controlled by the welding power

source defined as Slave.

10. Set parameter 713 to 0, the travel motor is not controlled by the welding power

source defined as Slave.

11. Set parameter 762 to 0, Slave does not search for another power source.

12. Set parameter 767 to 2, Node address on the welding power source defined as

Master.

13. Set parameter 9000 to 10, Node address for the welding power source defined

as Slave.

14. Switch off the voltage to both welding power sources.

15. Remove the clamp on CN18 (pin 1 and 2) on the Slave welding power source.

16. Remove the clamp on CN11 on the Master welding power source.

17. Connect cable W02 to the welding power sources.

18. Switch on the voltage to the Slave welding power source.

19. Switch on the voltage to the Master welding power source.

20. Check that the emergency stop coil is working, both the welding power sources

(emergency stop relay/emergency stop contactors) are switched off. After
resetting, the welding power sources start up normally and are ready for use.

21. Check that the parallel current value can be set in PEK.

For more information on component location on the circuit board, see the service
manual for the LAF welding power source.

hga7d1ea

-8-

GB

3 Location Drawing

3.1 Location drawing - Welding Power Source LAF 631

hga7d2ea

-9-

GB

3.2 Location drawing - Welding Power Source LAF 1001

hga7d2ea

-10-

GB

3.3 Location drawing - Welding Power Source LAF 1251/1601

hga7d2ea

-11-

GB

4 Connection in Parallel Using Six-Thyristor Operation

In this case the Master/Slave welding power sources are connected to the mains by
way of six thyristors (three in each welding power source). This results in softer
welding current as the phase shift is 60 ° instead of 120° .

S Connection of Master+Slave using the six-thyristor effect. Note that the primary

winding of the Slave is reversed.

S The phase shift goes down from 120° to 60° , see the diagrams below.

S The following sine-wave diagram shows the equalising effect obtained when

using inversion of the Slave transformer.

The requirement is that the welding power sources are of the same size, and that it
is possible to shift the input and output on the primary side of the main transformer.
This is easily done on LAF 1001, 1251 and 1601, whereas it is more complicated on
LAF 631, as the winding of the transformer is connected directly to the main
contactor.

hga7d3ea

-12-

GB

IMPORTANT!

Connect the right winding. Most power sources have more than one mains voltage.
This applies particularly to machines designed for different mains voltages.

Below you find examples how to connect master and slave to the mains when using
power sources without multivoltage connections.

hga7d3ea

-13-

DIAGRAM

Tractor variant

hga7diag

-14-

Automation variant

hga7diag

-15-

sida

-16-

SPARE PARTS LIST

Edition 101001

Ordering no. Denomination Notes

0808573882 Parallel connection kit

SpareFram

-17-

sida

-18-

Item

Qty Ordering no. Denomination Notes

no.

0808573882 Parallel connection kit LAF-PEK

W01 4 0801389053 Cable 4x2x0.5, liycy
W02 1 0458681908 Cable L=4 m

1 0436919007 Auxillary contact block

h808753s

-19-

ESAB subsidiaries and representative offices

Europe

AUSTRIA

ESAB Ges.m.b.H
Vienna-Liesing
Tel: [phone]
Fax: [phone]

BELGIUM

S.A. ESAB N.V.
Brussels
Tel: [phone]
Fax: [phone]

BULGARIA

ESAB Kft Representative Office
Sofia
Tel/Fax: [phone]

THE CZECH REPUBLIC

ESAB VAMBERK s.r.o.
Vamberk
Tel: [phone]
Fax: [phone]

DENMARK

Aktieselskabet ESAB
Herlev
Tel:[phone]
Fax:[phone]

FINLAND

ESAB Oy
Helsinki
Tel: [phone]
Fax: [phone]

FRANCE

ESAB France S.A.
Cergy Pontoise
Tel:[phone]
Fax:[phone]

GERMANY

ESAB GmbH
Solingen
Tel: [phone]
Fax: [phone]

GREAT BRITAIN

ESAB Group (UK) Ltd
Waltham Cross
Tel: [phone]
Fax: [phone]

ESAB Automation Ltd
Andover
Tel: [phone]
Fax: [phone]

HUNGARY

ESAB Kft
Budapest
Tel:[phone]
Fax:[phone]

ITALY

ESAB Saldatura S.p.A.
Bareggio (Mi)
Tel:[phone]
Fax:[phone]

NORWAY

AS ESAB
Larvik
Tel:[phone]
Fax:[phone]

POLAND

ESAB Sp.zo.o.
Katowice
Tel: [phone]
Fax: [phone]

PORTUGAL

ESAB Lda
Lisbon
Tel: [phone]
Fax: [phone]

ROMANIA

ESAB Romania Trading SRL
Bucharest
Tel: [phone]
Fax: [phone]

RUSSIA

LLC ESAB
Moscow
Tel: [phone]
Fax: [phone]

SLOVAKIA

ESAB Slovakia s.r.o.
Bratislava
Tel:[phone]
Fax:[phone]

SPAIN

ESAB Ibérica S.A.
Alcalá de Henares (MADRID)
Tel: [phone]
Fax: [phone]

SWEDEN

ESAB Sverige AB
Gothenburg
Tel:[phone]
Fax:[phone]

ESAB international AB
Gothenburg
Tel:[phone]
Fax:[phone]

SWITZERLAND

ESAB AG
Dietikon
Tel: [phone]
Fax: [phone]

UKRAINE

ESAB Ukraine LLC
Kiev
Tel: [phone]
Fax: [phone]

North and SouthAmerica

ARGENTINA

CONARCO
Buenos Aires
Tel: [phone]
Fax: [phone]

BRAZIL

ESAB S.A.
Contagem-MG
Tel:[phone]
Fax: [phone]

CANADA

ESAB Group Canada Inc.
Missisauga, Ontario
Tel: [phone]
Fax:[phone]

MEXICO

ESAB Mexico S.A.
Monterrey
Tel: [phone]
Fax:[phone]

USA

ESAB Welding & Cutting Products
Florence, SC
Tel: [phone]
Fax:[phone]

Asia/Pacific

CHINA

Shanghai ESAB A/P
Shanghai
Tel:[phone]
Fax: [phone]

INDIA

ESAB India Ltd
Calcutta
Tel:[phone]
Fax: [phone]

INDONESIA

P.T. ESABindo Pratama
Jakarta
Tel:[phone]
Fax: [phone]

JAPAN

ESAB Japan
Tokyo
Tel:[phone]
Fax: [phone]

MALAYSIA

ESAB (Malaysia) Snd Bhd
USJ
Tel: [phone]
Fax: [phone]

SINGAPORE

ESAB Asia/Pacific Pte Ltd
Singapore
Tel: [phone]
Fax: [phone]

SOUTH KOREA

ESAB SeAH Corporation
Kyungnam
Tel:[phone]
Fax: [phone]

UNITED ARAB EMIRATES

ESAB Middle East FZE
Dubai
Tel: [phone]
Fax: [phone]

Africa

EGYPT

ESAB Egypt
Dokki-Cairo
Tel: [phone]
Fax: [phone]

SOUTH AFRICA

ESAB Africa Welding & Cutting Ltd
Durbanvill 7570 - Cape Town
Tel: [phone]

Distributors

For addresses and phone
numbers to our distributors in
other countries, please visit our
home page

www.esab.com

THE NETHERLANDS

ESAB Nederland B.V.
Amersfoort
Tel: [phone]
Fax: [phone]

ESAB AB
SE-695 81 LAXÅ
SWEDEN
Phone [phone]

www.esab.com

110210