104
Parallel connection of
LAF- Welding power
sources
Master
Installation manual
0449 335 174 2005--09--21
Slave
ENGLISH 3..............................................
Rights reserved to alter specifications without notice.
-- 2 --
ENGLISH
1SAFETY 4...........................................................
2 INTRODUCTION 6...................................................
2.1 General 6..................................................................
2.2 Setting of Switches and Bridges 7.............................................
2.3 Parallel connection kit 8......................................................
3 Location Drawing 9..................................................
3.1 Parallel connection kit - Welding Power Source LAF 635 9........................
3.2 Parallel connection kit - Welding Power Source LAF 800/1000 9...................
3.3 Parallel connection kit - Welding Power Source LAF 1250/1600 10..................
4 Connection in Parallel Using Six--Thyristor Operation 11................
DIAGRAM 13............................................................
SPARE PARTS LIST 17...................................................
TOCe
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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.
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.
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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 MANUFACTURERS’ 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 take fumes and gases away 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 inflammable materials nearby.
NOISE -- Excessive noise can damage hearing
S Protect your ears. Use earmuffs or other hearing protection.
S Warn bystanders of the risk.
MALFUNCTION -- Call for expert assistance in the event of malfunction.
READ AND UNDERSTAND THE INSTRUCTION MANUAL BEFORE INSTALLING OR OPERATING.
PROTECT YOURSELF AND OTHERS!
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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 11.
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 Size
If the Welding powe r sources are of different size the Master will be charged at 80%
before the Slave is connected. This distribution is done automatically by the welding
power sources.
*1 Max = 2050 A
*2 800+200 = 1000 A
Master 800 A
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Slave 200 A
GB
2.2 Setting of Switches and Bridges
If LAF2 comes last in the network the bridge BY1 shall be switched on, whereas on
LAF1 BY1 shall be switched off.
18
In order to make LAF2 act as Slave, set the DIP switch (SW1) to
NB!
LAF1 (Master) must be switched on first, after that the LAF2 (Slave) should be
switched on.
If they are not powered in this order the Master/Slave configuration will not work and
no value will be received from LAF2 (Slave).
11101011
.
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2.3 Parallel connection kit
A kit for connection in parallel of the LAF welding power sources is available both for
automation and for tractors. Only the emergency stop circuit differs.
See the spare parts list on page 17.
Parallel connection (kit for Tractor version, 0808573880)
Parallel cable W01
Control cable
Master Slave
WELD OBJECT
Parallel connection (kit for Automation version, 0808573881)
Electrical
cabinet
Automation
Parallel cable W01
Control cable
Master Slave
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WELD OBJECT
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GB
3 Location Drawing
3.1 Parallel connection kit - Welding Power Source LAF 635
Note that XS51 only is available for the automation variant (0808573881).
Master Slave
3.2 Parallel connection kit - Welding Power Source LAF 800/1000
Note that XS51 only is available for the automation variant (0808573881).
Master Slave
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3.3 Parallel connection kit - Welding Power Source LAF 1250/1600
Note that XS51 only is available for the automation variant (0808573881).
Master Slave
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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.
L3
L3
L2
+
L2
L1
Master Slave
S The phase shift goes down from 120˚ to 60˚, see the diagrams below.
L3
L1
120
Master
0
L2
L2
0
120
L1
Slave
L1
L3
60
--
0
Master+Slave
S The following sine--wave diagram shows the equalising effect obtained when
using inversion of the Slave transformer.
Master
Slave
Master+
Slave
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 800, 1000, 1250 and 1600, whereas it is more
complicated on LAF 635, as the winding of the transformer is connected directly to
the main contactor.
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GB
IMPORTANT!
Connect the right winding. Most power sources have more than one mains voltage.
This applies particularly to m achines 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.
LAF 1
TM1
XT2
MAINS CONNECTI ON
LAF 1
021
000
121221
400V,50Hz
L2L1
022
019
400V,50Hz
MAINS CONNECT.
L3L2L1
500V,50Hz
MAINS CONNECT.
000
111
222
L3L2L1
LAF 2
TM1
2
XT2
Master Slave
500V,50Hz
MAINS CONNECTI ON
L3
023
020
L2L1
L3 L2L1
021
023
022
020
019
MAINS CONNECTI ON
LAF 2
MAINS CONNECT.
000
111
22
400V,50Hz
021
019
400V,50Hz
022
020
L3L2L1
MAINS CONNECTI ON
L3 L2L1
023
000
222
500V,50Hz
021
019
500V,50Hz
MAINS CONNECT.
L3L2L1
111
L3
022
020
023
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XT2
TM1
2102
021001002
0
102100021
0
XT2
210
0
0201010 2
00
0
2100211 2 0
TM1
1
1
Slave
1
2
2
2
1
2
2
1
1
1
2
11
2
2
2
1
2
11
22
Master
-- 1 2 --
Diagram
Tractor version, 12--pole
(valid from machine no. 615)
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-- 1 3 --
Automation version, 12--po le (valid from machine no. 615)
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-- 1 4 --
Tractor version, 28--pole
(valid from macine no. 310)
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-- 1 5 --
Automation version, 28--po le (valid from macine no. 310)
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-- 1 6 --
Spare parts list
Edition 2004--05--11
Ordering no. Denomination Notes
0808573880 Kit, Traktor version
0808573881 Kit, Automation version
SpareFram
-- 1 7 --
Item
no.
KM21 1 0436919007 Auxiliary contact Emergency stop X
XS4-- 2 1 0368541003 Pin plug Burndy 12--pole, Emergency stop X
XS52 1 0368543003 Pin outlet Burndy 12--pole X X
XT11 1 0193655012 Connection block 12--pole cut to 7--pole X X
Qty Ordering no. Denomination Notes * **
0808573880 Parallel connection LAF, Tractor
W01 4 0801389053 Cable LIYCY 4*2*0,5 Bus+Emergency stop, 4m X X
1 0368542003 Sleeve plug Burndy 12--pole X X
8 0323945005 Sleeves X X
W11 2 0191812101 Cable Bus, MKFR 0,22*2*1 X X
1 0456489002 Circuit board connection 6--pole for AP1--D X X
W21 2 0191812101 Cable Bus, MKFR 0,22*2*1 X X
1 0456489002 Circuit board connection 6--pole for AP1--D X X
2 0323945005 Pin 0,13--0,20 X X
2 0323945004 Pin 0,52--1,50 X
0,1 0809388001 Cable RK 1 Black, 0,1m X
4 0323945004 Pin 0,52--1,50 X X
10 5m 0809388001 Cable RK 1 Black X X
* Components that are to be used if XS4 is 12--pole (machine no. 615)
** Components that are to be used if XS4 is 28--pole (machine no. 310)
f808573s
-- 1 8 --
Parallel cable W01
Control cable
Master Slave
WELD OBJECT
f808573s
Master Slave
-- 1 9 --
Item
no.
KM21 1 0436919007 Auxiliary contact Emergency stop X
XS4-- 2 1 0368541003 Pin plug Burndy 12--pole Emergency stop X
XS51 1 0368543003 Pin outlet Burndy 12--pole X X
XS52 1 0368543003 Pin outlet Burndy 12--pole X X
XT11 1 0193655012 Connection block 12--pole cut to 7--pole X X
Qty Ordering no. Denomination Notes * **
0808573881 Parallel connection LAF, Automation
W01 4 0801389053 Cable LIYCY 4*2*0,5 Bus+Emergency stop, 4m X X
1 0368542003 Sleeve plug Burndy 12--pole X X
8 0323945005 Sleeves X X
W11 2 0191812101 Cable Bus, MKFR 0,22*2*1 X X
1 0456489002 Circuit board connection 6--pole for AP1--D X X
W21 2 0191812101 Cable Bus, MKFR 0,22*2*1 X X
1 0456489002 Circuit board connection 6--pole for AP1--D X X
2 0323945005 Pin 0,13-- 0,20 X X
2 0323945004 Pin 0,52-- 1,50 X
0,1m 0809388001 Cable X
2 0323945005 Pin 0,13-- 0,20 X X
4 0323945004 Pin 0,52-- 1,50 X X
4 0323945004 Pin 0,52-- 1,50 X X
10 5m 0809388001 Cable RK 1 Black X X
W02 0802803002 Cable (specify the correct cable length
when ordering)
W03 0802803008 Cable (specify the correct cable length
when ordering)
S1 1 0443740002 Contact block (Emergency stop push--
button)
2x0.5 mm
7x0.5 mm
2
2
X X
X X
X X
* Components that are to be used if XS4 is 12--pole (machine no. 615)
** Components that are to be used if XS4 is 28--pole (machine no. 310)
f808573s
-- 2 0 --
Electrical
cabinet
Automation
Master Slave
Parallel cable W01
Control cable
WELD OBJECT
f808573s
Master Slave
-- 2 1 --
ESAB subsidiaries and representative offices
Europe
AUSTRIA
ESAB Ges.m.b.H
Vienna--Liesing
Tel: +43 1 888 25 11
Fax: +43 1 888 25 11 85
BELGIUM
S.A. ESAB N.V.
Brussels
Tel: +32 2 745 11 00
Fax: +32 2 745 11 28
THE CZECH REPUBLIC
ESAB VAMBERK s.r.o.
Prague
Tel: +420 2 819 40 885
Fax: +420 2 819 40 120
DENMARK
Aktieselskabet ESAB
Copenhagen--Valby
Tel:+4536300111
Fax:+4536304003
FINLAND
ESAB Oy
Helsinki
Tel: +358 9 547 761
Fax: +358 9 547 77 71
FRANCE
ESAB France S.A.
Cergy Pontoise
Tel:+33130755500
Fax:+33130755524
GERMANY
ESAB GmbH
Solingen
Tel: +49 212 298 0
Fax: +49 212 298 218
GREAT BRITAIN
ESAB Group (UK) Ltd
Waltham Cross
Tel: +44 1992 76 85 15
Fax: +44 1992 71 58 03
ESAB Automation Ltd
Andover
Tel: +44 1264 33 22 33
Fax: +44 1264 33 20 74
HUNGARY
ESAB Kft
Budapest
Tel:+3612044182
Fax:+3612044186
ITALY
ESAB Saldatura S.p.A.
Mesero (Mi)
Tel:+3902979681
Fax:+390297289181
THE NETHERLANDS
ESAB Nederland B.V.
Utrecht
Tel: +31 30 2485 377
Fax: +31 30 2485 260
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AS ESAB
Larvik
Tel:+4733121000
Fax:+4733115203
POLAND
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Katowice
Tel: +48 32 351 11 00
Fax: +48 32 351 11 20
PORTUGAL
ESAB Lda
Lisbon
Tel: +351 8 310 960
Fax: +351 1 859 1277
SLOVAKIA
ESAB Slovakia s.r.o.
Bratislava
Tel:+421744882426
Fax:+421744888741
SPAIN
ESAB Ibérica S.A.
Alcalá de Henares (MADRID)
Tel: +34 91 878 3600
Fax: +34 91 802 3461
SWEDEN
ESAB Sverige AB
Gothenburg
Tel:+4631509500
Fax:+4631509222
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Gothenburg
Tel:+4631509000
Fax:+4631509360
SWITZERLAND
ESAB AG
Dietikon
Tel: +41 1 741 25 25
Fax: +41 1 740 30 55
North and South America
ARGENTINA
CONARCO
Buenos Aires
Tel: +54 11 4 753 4039
Fax: +54 11 4 753 6313
BRAZIL
ESAB S.A.
Contagem--MG
Tel: +55 31 2191 4333
Fax: +55 31 2191 4440
CANADA
ESAB Group Canada Inc.
Missisauga, Ontario
Tel: +1 905 670 02 20
Fax: +1 905 670 48 79
MEXICO
ESAB Mexico S.A.
Monterrey
Tel: +52 8 350 5959
Fax: +52 8 350 7554
USA
ESAB Welding & Cutting Products
Florence, SC
Tel: +1 843 669 44 11
Fax: +1 843 664 57 48
Asia/Pacific
CHINA
Shanghai ESAB A/P
Shanghai
Tel: +86 21 5308 9922
Fax: +86 21 6566 6622
INDIA
ESAB India Ltd
Calcutta
Tel: +91 33 478 45 17
Fax: +91 33 468 18 80
INDONESIA
P.T. ESABindo Pratama
Jakarta
Tel: +62 21 460 0188
Fax: +62 21 461 2929
JAPAN
ESAB Japan
Tokyo
Tel: +81 3 5296 7371
Fax: +81 3 5296 8080
MALAYSIA
ESAB (Malaysia) Snd Bhd
Shah Alam Selangor
Tel: +60 3 5511 3615
Fax: +60 3 5512 3552
SINGAPORE
ESAB Asia/Pacific Pte Ltd
Singapore
Tel: +65 6861 43 22
Fax: +65 6861 31 95
SOUTH KOREA
ESAB SeAH Corporation
Kyungnam
Tel: +82 55 269 8170
Fax: +82 55 289 8864
UNITED ARAB EMIRATES
ESAB Middle East FZE
Dubai
Tel: +971 4 887 21 11
Fax: +971 4 887 22 63
Representative offices
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Sofia
Tel/Fax: +359 2 974 42 88
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Dokki--Cairo
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Fax: +20 2 393 32 13
ROMANIA
ESAB Representative Office
Bucharest
Tel/Fax: +40 1 322 36 74
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ESAB Representative Office
Moscow
Tel:+70959379820
Fax: +7 095 937 95 80
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St Petersburg
Tel:+78123254362
Fax: +7 812 325 66 85
Distributors
For addresses and phone
numbers to our distributors in
other countries, please visit our
home page
www.esab.com
ESAB AB
SE--695 81 LAXÅ
SWEDEN
Phone +46 584 81 000
www.esab.com
041227
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