Welding Equipment ESAB North America - L-TEC VI-450 ... equipment/power...MAINTENANCE MANUAL...

MAINTENANCE MANUAL

F-15-099January, 1994

L-TEC VI-450WELDING POWER SOURCE

230/460/575 V ac, 60 Hz...P/N 33322220/380/415 V ac, 50 Hz...P/N 33323

These INSTRUCTIONS are for experienced operators. If you are not fully familiar with the principles of operationand safe practices for arc welding equipment, we urge you to read our booklet, "Precautions and Safe Practicesfor Arc Welding, Cutting, and Gouging", Form 52-529. Do NOT permit untrained persons to install, operate, ormaintain this equipment. Do NOT attempt to install or operate this equipment until you have read and fullyunderstand these instructions. If you do not fully understand these instructions, contact your supplier forfurther information. Be sure to read the Safety Precautions (Section 1) before installing or operating thisequipment.

Be sure this information reaches the operator.You can get extra copies through your supplier.

USER RESPONSIBILITY

This equipment will perform in conformity with the description thereof contained in this manual and accom-panying labels and/or inserts when installed, operated, maintained and repaired in accordance with the instructionsprovided. This equipment must be checked periodically. Defective equipment should not be used. Parts that arebroken, missing, worn, distorted or contaminated should be replaced immediately. Should such repair or replace-ment become necessary, the manufacturer recommends that a telephone or written request for service advice bemade to the Authorized Distributor from whom purchased.

This equipment or any of its parts should not be altered without the prior written approval of the manufac-turer. The user of this equipment shall have the sole responsibility for any malfunction which results from improperuse, faulty maintenance, damage, improper repair or alteration by anyone other than the manufacturer or a servicefacility designated by the manufacturer.

READ AND UNDERSTAND THESE INSTRUCTIONS ALONG WITHTHE SAFETY SECTIONS CONTAINED IN THIS MANUAL.

Protect yourself and others. Be sure this information reaches all operators.

ELECTRIC SHOCK can kill.Do not touch live electrical parts or electrodes with bare skin or wear wet gloves orwet clothing.

FUMES AND GASES can be dangerous to your health.Keep your head out of the fumes. Use enough ventilation, exhaust at the arc, orboth, to keep fumes and gases from your breathing zone and the general area.Where this cannot be done, use an air-supplied respirator.

If welding causes dizziness, nausea or respiratory irritation, ventilation is inade-quate. See your supervisor. See special precautions in references below whenwelding on materials containing or coated with lead, mercury, zinc, beryllium, cad-mium, chromium, nickel or other materials with toxic properties.

ARC RAYS can injure eyes and burn skin.Protect your eyes and body with proper welding helmet, safety glasses, eye filterlenses, and dark protective clothing.

NOISE can damage hearing.Wear proper hearing protection.

Read and understand these instructions and your employer's safety guidelines.

See American National Standard Z49.1, "Safety in Welding and Cutting", published bythe American Welding Society, P.O. Box 351040, Miami, Florida 33153; O.S.H.A. Safetyand Health Standards, 29 CFR 1910, available from U.S. Government Printing Office,Washington, D.C. 20402, and the safety section in this manual.

i2

L-TEC VI-450 Power Source

SECTION 1 SAFETY

1-1

1.1 Introduction

These safety precautions are for your protection. Theysummarize precautionary information contained in thereferences section below and as noted herein. Beforeperforming any installation or operating procedures, besure to read and follow the safety precautions listedbelow as well as all other manuals, material safety datasheets, labels, etc. Failure to observe safety precau-tions can result in personal injury or death.

This symbol appearing throughout thismanual means “Attention! Be Alert! Yoursafety is involved.”

The following definitions apply to WARNING and CAU-TION symbols found throughout this manual:

USED TO CALL ATTENTION TO IMMEDIATE HAZ-ARDS WHICH, IF NOT AVOIDED, WILL RESULT INIMMEDIATE, SERIOUS PERSONAL INJURY ORLOSS OF LIFE.

USED TO CALL ATTENTION TO POTENTIAL HAZ-ARDS WHICH COULD RESULT IN PERSONAL IN-JURY OR LOSS OF LIFE.

USED TO CALL ATTENTION TO HAZARDS WHICHCOULD RESULT IN MINOR PERSONAL INJURY.

1.2 General

PROTECT YOURSELF AND OTHERS-Some weld-ing, cutting, and gouging processes are noisy andrequire ear protection. Skin and eye burns from arcrays can be more severe than sunburn. Hot metalcan cause skin burns and heat rays may injureeyes. Training in the proper use of the processesand equipment is essential to prevent accidents.

• Always wear safety glasses with side shields inany work area, even if a welding helmet, faceshield, or goggles are also required.

• Use a face shield fitted with the correct filter andcover plates to protect your eyes, face, neck, andears from sparks and rays of the arc whenoperating or observing operations. WARN by-standers not to watch the arc and not to exposethemselves to the rays of the electric-arc or hotmetal.

• Wear flameproof gauntlet type gloves, heavylong sleeve shirt, cuffless trousers, high-toppedshoes, and a welding helmet or cap for hairprotection, to protect against arc rays and hotsparks or hot metal. A flameproof apron mayalso be desirable as protection against radiatedheat and sparks.

• Hot sparks or metal can lodge in rolled up sleeves,trouser cuffs, or pockets. Sleeves and collarsshould be kept buttoned, and open pockets elimi-nated from the front of clothing.

• Protect other personnel from arc rays and hotsparks with a suitable non-flammable partition orcurtains.

• Use goggles over safety glasses while chippingslag or grinding. Chipped slag may be hot andcan travel considerable distances. Bystandersshould also wear goggles over safety glasses.

1.3 Fire and Explosion

Heat from flames and arcs can act as ignitionsources. Hot slag or sparks can cause fire andexplosions.

• Hydrogen explosions can occur when using watertables.

• Remove all combustible materials well awayfrom the work area or completely cover thematerials with a protective non-flammable cover-ing. Combustible materials include wood, cloth,sawdust, liquid and gas fuels, solvents, paintsand coatings, paper, etc.

• Hot sparks or hot metal can fall through cracks orcrevices in floors or wall openings and cause ahidden smoldering fire or fires on the floor below.Make certain that such openings are protectedfrom hot sparks and metal.

3


SECTION 1 SAFETY

1-2

connection could expose the operator or othersin the area to a fatal shock.

• Do not use worn or damaged cables. Do notoverload the cable. Use well maintained equip-ment.

• When not operating, turn off the equipment.Accidental overloading can cause overheatingand create a fire hazard. Do not coil or loop cableover parts of the body.

• Be sure the proper size ground cable is con-nected to the workpiece as close to the work areaas possible. Grounds connected to buildingframework or other remote locations from thework area increase the possibility of output cur-rent passing through lifting chains, crane cables,or various electrical parts.

• Keep clothing, controls, and power source dry.Fix water leaks immediately (after shutting offpower).

• Refer to ANSI/ASC Standard Z49.1 (see listingbelow) for specific grounding recommendations.Do not mistake the work cable for a groundingcable.

1.5 Fumes and Gases

Fumes and gases can cause discomfort and/orharm, particularly in confined spaces. Do notbreathe fumes and gases. Shielding gases cancause asphyxiation.

• Always provide adequate ventilation in the workarea by natural or mechanical ventilation means.Do not weld, cut, or gouge on materials such asgalvanized steel, stainless steel, copper, zinc,lead, beryllium, or cadmium unless positive me-chanical ventilation is provided. Do not breathefumes and gases from these materials.

• Do not operate in locations close to chlorinatedhydrocarbon vapors coming from degreasingand spraying operations. The heat or arc rayscan react with solvent vapors to form phosgene,a highly toxic gas, and other irritant gases.

• If you develop momentary eye, nose, or throatirritations while operating, this is an indicationthat ventilation may not be adequate. Stop workand take necessary steps to improve ventilation

• Do not weld, cut, or perform other hot work untilthe workpiece has been completely cleaned sothat there are no substances on the workpiecewhich might produce flammable or toxic vapors.Do not do hot work on closed containers. Theymay explode.

• Have fire extinguishing equipment handy forinstant use, such as a garden hose, water pail,sand bucket, or portable fire extinguisher. Besure you are trained in its use.

• After completing operations, inspect the workarea to make certain there are no hot sparks orhot metal which could cause a later fire. Use firewatchers when necessary.

• For additional information refer to NFPA stan-dard 51B, “Fire Prevention in Use of Cutting andWelding Processes”, which is available from theNational Fire Protection Association,Batterymarch Park, Quincy, MA 02269.

1.4 Electrical Shock

Contact with live electrical parts can cause severeburns to the body or fatal shock. Severity ofelectrical shock is determined by the path andamount of current through the body. The higherthe voltage, the greater the hazard.

• Never allow live metal parts to touch bare skin orany wet clothing. Be sure gloves are dry.

• When standing on metal or operating in a damparea, make certain that you are well insulated.Wear dry gloves and rubber-soled shoes andstand on a dry board or platform.

• Do not stand on the plate or parts being cut duringthe cutting process.

• Do not touch the plate or pick up cut parts whilecutting is in progress.

• Always ground the power source by connectinga ground wire between the power source and theground system of the input power.

• Always make sure that the workpiece is con-nected to a good earth ground.

• It is especially important with plasma cuttingequipment to be sure that the work cable isconnected to the workpiece. A poor or missing

4


SECTION 1 SAFETY

1-3

in the work area. Do not continue to operate ifphysical discomfort persists.

• Refer to ANSI/ASC Standard Z49.1 for specificventilation recommendations.

1.6 Equipment Maintenance

Faulty or improperly maintained equipment canresult in poor work, but more importantly, it cancause physical injury or death through fires orelectrical shock.

• Always have qualified personnel perform theinstallation, troubleshooting, and maintenancework. Do not perform any electrical work unlessyou are qualified to perform such work.

• Before performing any maintenance work insidea power source, disconnect the power sourcefrom the electrical power supply.

• Maintain cables, grounding wire, connections,power cord, and power source in safe workingorder. Do not operate any equipment in faultycondition.

• Do not abuse any equipment or accessories.Keep equipment away from heat sources suchas furnaces, wet conditions such as waterpuddles, oil or grease, corrosive atmospheresand inclement weather.

• Keep all safety devices and cabinet covers inposition and in good repair.

• Use equipment for its intended purpose. Do notmodify it in any manner.

1.7 Cylinders

Cylinders, if mishandled, can rupture and violentlyrelease gas. Sudden rupture of cylinder, cylindervalve, or relief device can injure or kill.

• Use the proper gas for the process and use theproper pressure reducing regulator designed tooperate from the compressed gas cylinder. Donot use adapters. Maintain hoses and fittings ingood condition. Follow manufacturer’s operatinginstructions for mounting regulator to a com-pressed gas cylinder.

• Always secure cylinders in an upright position by

chain or strap to suitable handtrucks, undercar-riages, benches, walls, post, or racks. Neversecure cylinders to work tables or fixtures wherethey may become part of an electrical circuit.

• When not in use, keep cylinder valves closed.Have valve protection cap in place if not con-nected for use. Secure and move cylinders byusing suitable hand trucks. Avoid rough handlingof cylinders.

• Locate cylinders away from heat, sparks, orflame of a welding, cutting, or gouging operation.Never strike an arc on a cylinder.

• For additional information, refer to CGA Stan-dard P-1, “Precautions for Safe Handling ofCompressed Gases in Cylinders”, which is avail-able from Compressed Gas Association, 1235Jefferson Davis Highway, Arlington, VA 22202.

1.8 References

For more information on safe practices for setting upand operating electric welding and cutting equipmentand on good working habits, ask your ESAB supplier fora copy of “Precautions and Safe Practices for ElectricWelding and Cutting”, Form 52-529.

The following publications, which are available from theAmerican Welding Society, 550 LeJuene Road, Miami,FL 33126, are recommended to you:

• ANSI/ASC Z49.1 - “Safety in Welding and Cut-ting”

• AWS C5.1 - “Recommended Practices forPlasma Arc Welding”

• AWS C5.2 - “Recommended Practices forPlasma Arc Cutting”

• AWS C5.3 - “Recommended Practices for AirCarbon Arc Gouging and Cutting”

• AWS C5.5 - “Recommended Practices for GasTungsten Arc Welding”

• AWS C5.6 - “Recommended Practices for GasMetal Arc Welding”

• AWS SP - “Safe Practices” - Reprint, WeldingHandbook.

5


SECTION 2 MAINTENANCE

2-1

2.1 General

If this Power Source does not operate properly, stopwork immediately and investigate the cause of themalfunction. Maintenance work must be performed byan experienced person, and electrical work by a trainedelectrician. Do not permit untrained persons to inspect,clean, or repair this Power Source. Use only recom-mended replacement parts.

BE SURE THAT THE BRANCH CIRCUIT OR MAINDISCONNECT SWITCH IS OFF, OR ELECTRICALINPUT FUSES ARE REMOVED, BEFORE ATTEMPT-ING ANY INSPECTION OR WORK INSIDE THEPOWER SOURCE. PLACING THE POWER SWITCHIN THE OFF POSITION DOES NOT REMOVE ALLPOWER FROM INSIDE THE POWER SOURCE.

2.2 Cleaning

Periodically, remove the cover from the Power Sourceand blow accumulated dust and dirt from the air pas-sages and interior components by using clean lowpressure air. The frequency of cleaning required de-pends upon the environment in which the Power Sourceis used.

It is imperative that all air passages be kept as clean aspossible in order to allow adequate air flow to provideproper cooling.

After cleaning with low pressure air, check for andtighten any loose hardware, including all electricalconnections. Check for frayed and/or cracked insula-tion on all power cables and replace if necessary.

FAILURE TO REPLACE WORN OR DAMAGEDCABLES MAY RESULT IN A BARE CABLE TOUCH-ING A GROUND SURFACE. THE RESULTING ELEC-TRICAL ARC MAY DAMAGE UNPROTECTED EYESAND WILL PRESENT A SERIOUS FIRE HAZARD.BODY CONTACT WITH A BARE CABLE, CONNEC-TOR, OR CONDUCTOR MAY RESULT IN SEVEREELECTRICAL SHOCK, CAUSING SERIOUS BURNSOR DEATH.

2.3 Inspection and Service

Regularly, check cylinder valves, regulators, hoses,and gas connections for leaks using a soap solution ora leak test solution.

Keep the Power Source dry, free of oil and grease, andprotected at all times from damage by hot metal andsparks.

2.3.1 Fan Motor

Keep the fan motor free of accumulated dust and lint byusing low pressure air. Lubricate the motor every threemonths with a few drops of SAE-20 non-detergent oil.

2.3.2 Transformer

Other than periodically cleaning the dust and dirt fromthe transformer as described above, no maintenance isrequired. Ensure that only clean, dry, low-pressure airis used.

2.3.4 Wire Feeder and Control Circuits

These circuits are protected by two 10 amp fusesmounted in the rear panel fuse holder (CB1, 2). If thesefuses fail, the contactor, shielding gas, and wire feederwill not operate.

When replacing a fuse in the welding Power Source,ensure that the proper size fuse is used as areplacement.

2.3.5 Over-Temperature Protection

If the Power Source reaches an abnormally high inter-nal temperature, the thermal protection relay willdeenergize, shutting down the Power Source but leav-ing the cooling fan on. After the Power Source hascooled to a safe level, this relay will be energized andnormal operation will be restored. While deenerigized,the contactor, shielding gas, and wire feeder cannot beoperated.

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SECTION 3 TROUBLESHOOTING

3-1

3.1 General

DISCONNECT PRIMARY POWER AT WALLSWITCH, OR CIRCUIT BREAKER, BEFORE AT-TEMPTING INSPECTION OR WORK INSIDE THEPOWER SOURCE.

If the Power Source is operating improperly, the follow-ing troubleshooting information may be used to locatethe source of the trouble.

Check the problem against the symptoms in the follow-ing troubleshooting guide. The remedy for the problemmay be quite simple. If the cause cannot be quicklylocated, open up the unit and perform a simple visualinspection of all the components and wiring. Check forproper terminal connections, loose or burned wiring orcomponents, blown fuses, bulged or leaking capaci-tors, or any other sign of damage or discoloration.

3.2 Testing and Replacing Bridge Assem-bly Components

The silicon diodes and SCRs used in the Power Sourceare devices which allow current to flow in only onedirection. The diodes and SCRs are designed toprovide long trouble-free operation; however, should afailure occur, they may require replacement.

A. Testing SCRs.

1. Locate the main rectifier assembly containingthe silicon diodes and SCRs.

2. Remove top and right side panel from thePower Source.

3. Electrically isolate main bridge assembly bydisconnecting the capacitor bank and resistorR5.

4. With the ohmmeter on RX1 scale, place thepositive lead on the anode (end of SCR withscrew threads) and the negative lead on thecathode (positive output terminal on the frontpanel). The meter should read 30-50 ohms(high resistance).

5. Reverse leads and check each SCR. Allreadings should again show high resistance.The SCRs are bad if they show low resistancein either direction.

6. Check the gate circuit on the SCRs by jumperingthe gate lead to the anode of the SCR. Themeter should read less than 5 ohms. Removethe jumper from the gate. The meter readingshould increase (30-50 ohms).

When replacing diodes on SCRs, make sure mount-ing surfaces are clean. Coat mounting surfaceswith Alcoa No. 2 EJC Electrical Joint Compound.Use a torque wrench to tighten diodes and SCRs.Recommended torques are 20-30 in-lbs for diodes;125-150 in-lbs for SCRs.

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3-2

Table 3-1. PCB Voltage Tests*

NOTE

All voltage readings are taken with the front accesspanel open.

ELECTRICAL SERVICE AND REPAIR SHOULD BEATTEMPTED ONLY BY A TRAINED ELECTRICIAN.

SCR VOLTAGES (INPUT)

FROM TO READING

P1-8 P1-9 115 V ac

P2-8 (SCR1)P2-7 (SCR2)P2-3 (SCR3)P2-6 (SCR4)P2-1 (SCR5)P2-4 (SCR6)

OTB+ (Flat) 14 V ac

SCR VOLTAGES (OUTPUT)

FROM TO READING

P1-11 OTB+ (Flat) +10 V dc

P1-4 OTB+ (Flat) 0-10 V dc**

P2-5 (SCR1)P2-2 (SCR2)P2-12 (SCR3)P2-9 (SCR4)P2-10 (SCR5)P2-11 (SCR6)

OTB+ (Flat) .3 V dc withcontactor on

*Refer to Schematic Diagram**Varies with VCP (R1)

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3-39

Table 3-2. Troubleshooting Guide

CONDITION ACTION

Unit inoperative A.B.C.D.

E.

F.

No input power. Check main line (user's) switch fuses -- replace if needed.Poor or improper input (terminal board) connections.Defective ROS switch on front panel -- replace.Main transformer overheating. Also check for proper cooling, proper primaryhookup, or shorted turn on secondary.Fan motor not operating -- check motor and leads. Remember, this is normal whenthe thermal fan control circuit is activated.Main contactor defective -- check for proper operation.

No Output -- FanRunning

A.B.C.

D.E.

Poor or improper electrical input -- check input connections on TB.Poor connections at output terminals/work station -- check, tighten or replace.Main transformer overheating -- thermal switches tripped due to restricted coolingair. Let unit cool down.Solid-state breaker tripped due to current overload.PC board defective or loose PC board connector(s) -- if loose, reinsert; if defective,replace.

Limited Output or LowOpen-Circuit Voltage

A.

B.C.D.

Input voltage jumper links on terminal board improperly set -- check for propervoltage.Poor output connections. Take apart, clean, and reassemble.Unit may be single-phasing -- check incoming power for three phases.Panel-Remote switch in Remote position and remote voltage pot disabled.

Erratic Weld Current A.B.C.D.E.F.

Welding cable size too small -- use correct cables.Loose welding cable connection (will usually get hot) -- tighten all connections.Improper wire feeder setup.Defective SCR in bridge rectifier.PC board defective -- replace.Unit may be single phasing -- check the incoming power for three phases.

High Output, NoVoltage Control

PC board defective or loose -- reset and/or replace board.

No 115 Volt ac Output A.B.

Check secondary of control transformer (T2) for 115 V ac.Circuit breaker tripped -- reset.

Line Fuse Blows WhenPower Source is FirstTurned On

A.B.

Shorted SCR in Main Bridge -- replace.Shorted capacitor in Capacitor Bank.

Wire Sparks andSticks to Workpiece atEnd of Weld

A.

B.

Allow 2 to 4 seconds for capacitor banks to discharge after completing the weld andbefore touching wire to workpiece.If doubling the discharge rate is desired (twice as fast) and the thermal fan circuit isnot activated (generate excessive heat), change R5 (16 ohm, 300 watt) resistor to 8ohm, 300 watt resistor (P/N 17300008). To quadruple the discharge rate (fourtimes as fast), two 8 ohm resistors may be connected in parallel in place of R5.



3-410

Figure 3-1. L-TEC VI-450 Power Source Schematic Diagram - 60 Hz (Sheet 1 of 2)

NOTE: Recent modifications to the power source may not be reflected in thisschematic. For up-to-date information on your model, refer to the schematicon the inside cover of the power source or contact the factory.



3-5


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3-612

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3-7

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3-8

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3-915

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3-10


16

NOTE: Recent modifications to the power source may not be reflected in thisschematic. For up-to-date information on your model, refer to the schematicon the inside cover of the power source or contact the factory.



3-11


17



3-1218

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-4. L

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VI-4

50 P

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3-13

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19



3-1420

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3-1521

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SECTION 4 PARTS

4-1

4.1 General

Replacement Parts are illustrated on the followingfigures. When ordering replacement parts, order bypart number and part name, as illustrated on the figure.DO NOT ORDER BY PART NUMBER ALONE.

Always provide the series or serial number of the unit onwhich the parts will be used. The serial number isstamped on the unit nameplate.

4.2 Ordering

To assure proper operation, it is recommended thatonly genuine L-TEC parts and products be used withthis equipment. The use of non-L-TEC parts may voidyour warranty.

Replacement parts may be ordered from your L-TECdistributor or from:

L-TEC Welding and Cutting SystemsP.O. Box 100545Ebenezer RoadFlorence, SC 29501-0545

A. Give the part number, description and quantity ofeach part required.

B. Give part number and description of equipment onwhich the parts are to be used.

C. Indicate any special shipping instructions.

For technical assistance directly from an L-TEC servicerepresentative, call (803)664-4416 or 5550. Addition-ally, L-TEC offers a toll free facsimile (FAX) service via1-800-446-5693.

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SECTION 4 PARTS

4-2

Figure 4-1. L-TEC VI-450 (Front View)

1

2

ITEMNO.

QTYREQ.

PARTNO. DESCRIPTION

CIRCUITDESIG.

12345678910111213

1111111114211

13735182672508634515

2134926634516951278951280639541672507

137339351379251320622012062171

LIGHT, INDICATORSWITCH, 3-POS.SWITCH, TOGGLE, SPDTLIGHT, INDICATORSWITCH, TOGGLE, SPDTVOLTMETER, DC, 60 VAMMETER, DC, 600 APOTENTIOMETER, 15 KRHEOSTAT, 300 W, 12 OHMRECEPTACLE, CABLECONNECTOR, QUICK (SUPPLIED)KNOBKNOB

PL1S1S3PL2S2VMAMR1R2

9, 138, 12

7

6

5

4

3

10, 11

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SECTION 4 PARTS

4-3

Figure 4-2. L-TEC VI-450 Control Access Panel (Open)

2

3

1

ITEMNO.

QTYREQ.

PARTNO. DESCRIPTION

CIRCUITDESIG.

123

111

13735102635686675312

RELAY, 3PDT, 42 VBLOCK, TERMINAL, 8-POINTPC BOARD ASSY

K2TB5

PCB1

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SECTION 4 PARTS

4-4

Figure 4-3. L-TEC VI-450 (Left Side View)

3

4567

8

9

10

11

ITEMNO.

QTYREQ.

PARTNO. DESCRIPTION

CIRCUITDESIG.

1

23456

7891011

1

11111

11112

33332332176735023376933216635686334863314133162672330673676

206233413735308

TRANSFORMER, CONTROL (60 HZ)TRANSFORMER, CONTROL (50 HZ)CONTACTOR, 75 ASHUNTINDUCTOR ASSYBLOCK, TERMINAL, 8-POINTTRANSFORMER ASSY, MAIN (60 HZ)TRANSFORMER ASSY, MAIN (50 HZ)RESISTOR ASSY, SLOPESPIDER, FANBLADE, FANMOTOR, FANRELAY, DPDT, 120 V AC

T2

K1SHL1

TB4T1

R4

M1K4,5

25

1,2


SECTION 4 PARTS

4-5

Figure 4-4. L-TEC VI-450 (Right Side View)

1

2

34

BRIDGE ASSY (REFERTO FIGURE 4-6)

ITEMNO.

QTYREQ.

PARTNO. DESCRIPTION

CIRCUITDESIG.

12

3456

11

11103

9515413332833171951201

17300016673459672348

BLOCK, TERMINAL, 20-POINTBOARD, TERMINAL (60 HZ)BOARD, TERMINAL (50 HZ)FUSE, 10 A, 600 VRESISTOR, 16 OHM, 300 WCAPACITOR, 9800 uF, 50 V DCCAPACITOR, .01 uF, 1.0 KV

TB2TB1

F1,2R5

C13-22C10-12

26

5

6


SECTION 4 PARTS

4-6

Figure 4-5. L-TEC VI-450 (Rear View)

1

2

ITEMNO.

QTYREQ.

PARTNO. DESCRIPTION

CIRCUITDESIG.

1234

1111

951539951540647298950122

RECEPTACLE, 19-PINRECEPTACLE, 14-PINRECEPTACLE, 115 V, DUPLEXCIRCUIT BREAKER, 10 AMP

J1J2J3

CB1,2

4

3

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SECTION 4 PARTS

4-7

Figure 4-6. Bridge Assembly

1

2

34

28

ITEMNO.

QTYREQ.

PARTNO. DESCRIPTION

CIRCUITDESIG.

1234

6663

67234813735018950841950711

CAPACITOR, .01 uF, 1.0KVCORE, TOROIDTHYRISTOR, SCRSWITCH, THERMAL

C1-6L2-7

SCR1-6TS1-3

F-15-099 1/94 15C Printed in U.S.A.

L-TEC Welding & Cutting SystemsPO Box 100545Florence SC 29501-0545

Welding Equipment ESAB North America - L-TEC VI-450 ... equipment/power...MAINTENANCE MANUAL...

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Transcript of Welding Equipment ESAB North America - L-TEC VI-450 ... equipment/power...MAINTENANCE MANUAL...