Lincoln Electric SVM155-A service manual Output Connections, Paralleling

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A-5

A-5

INSTALLATION

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OUTPUT CONNECTIONS

The Multi-Source has two parallel connected output studs for positive and negative connections. Each one is rated to carry the full output current. For its maximum rated current at 100% duty cycle a minimum size of 4/0 AWG welding cable is recommended.

Connection of Electrode and Work Leads to Output terminals.

1.Set the POWER ON/OFF Toggle Switch to OFF.

2.Raise the hinged cover protecting the output termi- nals.

3.Insert the electrode lead up through the elliptical hole in the machine base below the positive output terminal. Pull through enough cable to reach the out- put terminal.

4.Connect electrode lead to the terminal .

5.Tighten the output terminal nut with a wrench.

6.Connect the work lead to the negative output termi- nal following steps 3-5.

7.Lower the cover to protect the output terminals.

MULTI-SOURCE OUTPUT LIMITATIONS

The number of Multi-Weld Converters that may be con- nected to a single Multi-Source Power Source is deter- mined by the following formula:

Power Source (Volts x Amps) capacity > 1.1 x Sum

of Converters’ (Volts x Amps) arcs

The number of Multi-Weld 350s, the procedures used and the combined duty cycle of the arcs are only limit- ed by the 40,000 (36,000 watts on 50Hz) watt rating of the Multi-Source supply. The machine is IP-23S rated and is designed for outdoor applications.

DISTRIBUTION BOX

The Multi-Weld Distribution Box (K1736-1) is available for interconnection of the Multi-System using the same “pig-tail” connection method provided with the Multi- Weld 350 converter. Six cable strain-relief ports are provided for connection of up to (12) cables for distrib- ution or “daisy-chain” inter-connection to other boxes. Four “pig-tail” leads (see below) are included with the Box.

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FIGURE A.4. - Output Terminal Connections

PARALLELING

Machines may be paralleled for increased output. The S20428 paralleling kit permits paralleling of two MULTI- SOURCE power supplies for supplying currents of up to 1000 amps, 100% duty cycle.

“PIG TAIL” LEADS AND CONNEC- TIONS

Accessory “pig tail” leads and Twist-Mate connectors are available from Lincoln for extra connections to the Multi-Weld 350 or the Distribution Box:

Order No.

Description:

CL012705

22in. (56cm) long 2/0 (70mm2) cable

 

with 0.5in. (13mm) hole lug and cut-off

 

ends.

K852-70

Twist-Mate male insulated plug for 1/0-

 

2/0 (50-70mm2) cable

K852-95

Twist-Mate male insulated plug for 2/0-

 

3/0 (70-95mm2) cable.

K1759-70

Twist-Mate female insulated recepta-

 

cle for 1/0-2/0 (50-70mm2) cable.

K1759-95

Twist-Mate female insulated recepta-

 

cle for 2/0-3/0 (70-95mm2) cable

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MULTI-SOURCE

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Contents MULTI-SOURCE TM California Proposition 65 Warnings SafetyElectric Shock can kill Welding Sparks can cause fire or explosion Sûreté Pour Soudage a L’Arc Précautions DE SûretéMaster Table of Contents for ALL Sections Table of Contents Installation Section Technical Specifications Multi-Source K1752-1 InstallationTilting Safety PrecautionsSelect Proper Location StackingInput and Grounding Connections Fuse and Wire SizesParalleling Output ConnectionsMULTI-SOURCE Table of Contents Operation Section Operation Safety InstructionsRecommended EQUIPMENT/PROCESSES Design Features and ADVAN- TagesGeneral Description Recommended EQUIPMENT/CONNECTIONS Controls and SettingsTable of Contents Accessories Field Installed Options / Accessories Factory Installed Options / AccessoriesTable of Contents Maintenance Routine and Periodic MAINTE- Nance Safety PrecautionsFigure D.1 Major Component Location MULTI-SOURCE Table of Contents Theory of Operation Input VOLTAGE, FILTER, Contac TOR and Control Trans Former General DescriptionReturn to Section Section TOC Troubleshooting & RepairOperation Protection Devices and CIR Cuits Figure E.5 SCR Operation SCR OperationTable of Contents Troubleshooting & Repair Section HOW to USE Troubleshooting Guide Electric Shock can kill PC Board Troubleshooting Procedures and ReplacementTroubleshooting Guide T1 Test Calibration ProcedurePerform the Firing Board Test Perform the Main TransformerCircuit external to the Multi Main Transformer Test Technical SpecificationsInput Contactor Test Functions ProblemsControl Transformer T2 Voltage Test Test DescriptionFigure F.1. Control Transformer Location & Leads Test Procedure575 VAC 43.0 VAC 460 VAC 34.50 VAC 380 VAC 28.50 VAC Secondary Thermostat Input Contactor Test 241COIL Input Contactor TestTest for Contact Continuity Removal and Replacement ProcedureMULTI-SOURCE Main Transformer T1 Voltage Test Contactor Test Main Transformer T1 Voltage 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 See Figure F.15 Control Board Test#341 #230 #215 #231 #263 #201 J1 MULTI-SOURCE Firing Board Test Static and Active SCR Tests Figure F.17Then Table F.2. LED 7, 8 and 9 Check List#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 Description Input Contactor Cleaning AND/OR ReplacementRemoval Procedure Coil 240MULTI-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 Figure F.27 See Figure F.26Perform Meter Accuracy Test No Load Readings FAN OFFMaximum Open Circuit Voltage MULTI-SOURCE Table of Contents Electrical Diagrams Section Electrical DiagramsMULTI-SOURCE Wiring DiagramSchematic Control PC Board Return to Section PC Board ASSEMBLY-CONTROLSchematic Firing Printed Circuit Board TP1 PC Board ASSEMBLY-FIRINGM14312 PC Board Assembly SnubberSVM 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.