Lincoln Electric SVM155-A service manual Fuse and Wire Sizes, Input and Grounding Connections

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A-4

A-4

INSTALLATION

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FUSE AND WIRE SIZES

Protect the input circuit with the super lag fuses or delay type circuit breakers listed on the Technical Specifications page of this manual for the machine being used. They are also called inverse time or ther- mal/magnetic circuit breakers.

DO NOT use fuses or circuit breakers with a lower amp rating than recommended. This can result in nuisance tripping caused by inrush current even when machine is not being used for welding at high output currents.

Use input and grounding wire sizes that meet local electrical codes, or see the Technical Specifications page in this manual.

Input Connection Diagram located on the inside of Case Back Input Access Door.

The conductor and fuse sizes in the Technical Specification Section), are per the National Electrical Code. The sizes are in American Wire Gauge (and the next largest standard metric size in mm2). National and local codes must be consulted before connecting a machine.

Protect the input circuit with the super lag fuses or delay type circuit breakers listed in the Technical Specification Section. (They are also called inverse time or thermal / magnetic circuit breakers.)

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INPUT AND GROUNDING

CONNECTIONS

Note: A qualified electrician should connect the input power supply leads.

Input conductor is brought into the machine input box area through a hole in the rear panel sized to accom- modate 2" (trade size) conduit and fittings. This is more than adequate for the largest conductors required.

Conductors must be lugged to attach to the three 3/8" studs on the input reconnect panel and the 5/16" ground stud marked with the symbol . The input volt- age supplied determines the position required for the reconnect panel jumper. The three ranges on the stan- dard machine are 380-415, 440-460 and 550-575. The machine is rated for 50 and 60 Hz operation. See the

RECONNECT PROCEDURE

Multiple voltage machines are shipped connected to the highest input voltage listed on the machine’s rating plate. Before installing the machine, check that the Reconnect Panel in the Input Box Assembly is con- nected for the proper voltage.

CAUTION

Failure to follow these instructions can cause immedi-

ate failure of components within the machine.

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To reconnect a multiple voltage machine to a different voltage, remove input power and follow the input Connection Diagram located on the inside of the Case Back Input Access Door. This connection diagram is shown below.

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FIGURE A.3. - Input Connection Diagram

550-575V Connection

INPUT

L3

W

WARNING

L2

All input power must be electrically discon-

 

LINES

 

L1

V

nected before touching reconnect panel.

 

U

 

 

 

1. Mount the movable reconnect bar to

 

 

 

 

 

440-460V Connection

the stationary reconnect panel as

 

 

 

shown, and secure firmly with the

INPUT

L3

W

three hex nuts provided.

L2

 

 

 

LINES

V

2. Connect L1, L2, and L3 input supply

L1

 

U

lines to the input side of the recon-

 

 

nect panel as shown.

 

 

 

 

 

380-415V Connection

3. Connect terminal marked to ground

 

 

 

INPUT

L3

W

per national electrode code.

L2

 

 

 

LINES

V

 

L1

 

 

 

 

 

 

U

 

 

 

MULTI-SOURCE

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Contents MULTI-SOURCE TM Safety California Proposition 65 WarningsElectric Shock can kill Welding Sparks can cause fire or explosion Précautions DE Sûreté Sûreté Pour Soudage a L’ArcMaster Table of Contents for ALL Sections Table of Contents Installation Section Installation Technical Specifications Multi-Source K1752-1Stacking Safety PrecautionsSelect Proper Location TiltingFuse and Wire Sizes Input and Grounding ConnectionsOutput Connections ParallelingMULTI-SOURCE Table of Contents Operation Section Safety Instructions OperationGeneral Description Design Features and ADVAN- TagesRecommended EQUIPMENT/PROCESSES Controls and Settings Recommended EQUIPMENT/CONNECTIONSTable of Contents Accessories Factory Installed Options / Accessories Field Installed Options / AccessoriesTable of Contents Maintenance Safety Precautions Routine and Periodic MAINTE- NanceFigure D.1 Major Component Location MULTI-SOURCE Table of Contents Theory of Operation General Description Input VOLTAGE, FILTER, Contac TOR and Control Trans FormerTroubleshooting & Repair Return to Section Section TOCOperation Protection Devices and CIR Cuits SCR Operation Figure E.5 SCR OperationTable of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide PC Board Troubleshooting Procedures and Replacement Electric Shock can killTroubleshooting Guide Perform the Main Transformer Calibration ProcedurePerform the Firing Board Test T1 TestCircuit external to the Multi Technical Specifications Main Transformer TestFunctions Problems Input Contactor TestTest Description Control Transformer T2 Voltage TestTest Procedure Figure F.1. Control Transformer Location & Leads575 VAC 43.0 VAC 460 VAC 34.50 VAC 380 VAC 28.50 VAC Secondary Thermostat Input Contactor Test Input Contactor Test 241COILRemoval and Replacement Procedure Test for Contact ContinuityMULTI-SOURCE Main Transformer T1 Voltage Test Main Transformer T1 Voltage Test Contactor TestFigure F.6. Main Secondary Lead Test Points MULTI-SOURCE Static SCR Test Static SCR Test Leads Remove Red Paint Active SCR Test Active SCR Test Active SCR Test Remove Red Paint SW1 MULTI-SOURCE Control Board Test Control Board Test See Figure F.15#341 #230 #215 #231 #263 #201 J1 MULTI-SOURCE Firing Board Test Figure F.17 Static and Active SCR TestsTable F.2. LED 7, 8 and 9 Check List Then#231 #215 #340 J8 #287 MULTI-SOURCE Meter Accuracy Check Control Board Normal Open Circuit Voltage Waveform no Load Volts Typical SCR Gate Voltage Waveform no Load MULTI-SOURCE Input Contactor Cleaning AND/OR Replacement DescriptionRemoval Procedure 240 CoilMULTI-SOURCE Control Board Replacement Procedure Control Board Firing Board Replacement Procedure Firing Board SCR Bridge / Heat Sink Assembly Replacement Procedure Bridge Assembly Mount #251 Mounting Bolt Removal of Individual SCR Heat Sink Assemblies See Figure F.26 Figure F.27Maximum Open Circuit Voltage No Load Readings FAN OFFPerform Meter Accuracy Test MULTI-SOURCE Electrical Diagrams Table of Contents Electrical Diagrams SectionWiring Diagram MULTI-SOURCESchematic Control PC Board PC Board ASSEMBLY-CONTROL Return to SectionSchematic Firing Printed Circuit Board PC Board ASSEMBLY-FIRING TP1PC Board Assembly Snubber M14312SVM Error Reporting Form

SVM155-A specifications

The Lincoln Electric SVM155-A is a state-of-the-art welding machine that excels in versatility and performance, making it ideal for both professional welders and hobbyists. This multi-process welder supports MIG, TIG, and stick welding processes, allowing users to tackle a wide range of applications with a single device. Its user-friendly design and advanced technology make it an exceptional choice for those looking to enhance their welding capabilities.

One of the main features of the SVM155-A is its robust power output, which can handle welding materials ranging from thin sheets to heavier stock. The welder offers a high duty cycle, ensuring that users can work efficiently without the need for prolonged breaks. This is especially important in industrial settings where productivity is key. Additionally, the SVM155-A is equipped with a digital display that allows for easy monitoring and precise control of the welding parameters, ensuring consistency in weld quality.

The European-designed INVERTER technology embedded in the SVM155-A significantly contributes to its lightweight and compact design. Weighing in at only 19.4 lbs, this welder is portable and ideal for fieldwork or workshops where space is limited. The inverter technology not only reduces the size and weight but also improves energy efficiency, leading to lower operational costs over time.

The SVM155-A also features advanced safety mechanisms, including over-current protection to safeguard the machine from potential damage during excessive use. It also includes a thermal overload shut-off, which prevents overheating, ensuring a longer lifespan for the welder.

Another standout characteristic of the SVM155-A is its exceptional arc stability and ease of use. The machine is designed to provide a smooth and consistent arc, reducing spatter and ensuring clean welds. Moreover, the welder is compatible with a wide range of materials, including stainless steel, aluminum, and carbon steel, further enhancing its versatility.

In conclusion, the Lincoln Electric SVM155-A is a powerful, durable, and multifunctional welding machine that incorporates advanced technologies to meet the needs of modern welding applications. Its portability, safety features, and ability to deliver high-quality welds make it an excellent investment for anyone looking to improve their welding skills or expand their capabilities in various welding projects.
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