E-8

THEORY OF OPERATION

E-8

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PROTECTIVE CIRCUITS

Protective circuits are designed into the Invertec machine to sense trouble and shut down the machine before the trouble damages the internal machine components. Both overload and thermal protection circuits are included.

OVERLOAD PROTECTION

The machine is electronically protected from produc- ing excessive output current. Should the output cur- rent exceed 340 to 360 amps, an electronic protec- tion circuit will reduce the current to approximately 150 amps. Lincoln Electric refers to this current reduction as “Fold Back.” The machine will continue to produce this low current until the protection circuit is reset by removing the load.

Another protection circuit is included to monitor the voltage across input filter capacitors. In the event that the capacitor voltage is too high, the protection circuit will signal the Control Board to prevent output. The protection circuit may prevent output, if any of these circumstances occur:

1.Capacitor conditioning is required

(Required if machine has been off for prolonged periods of time.)

THERMAL PROTECTION

Thermostats protect the machine from excessive operating temperatures. Excessive temperatures may be caused by a lack of cooling air or by operat- ing the machine beyond it’s duty cycle or output rat- ing. If excessive operating temperature should occur, the thermostat will open and prevent output. The meter will remain on during this time. Thermostats will normally self-reset once the machine cools suffi- ciently.

If the thermal shutdown was caused by excessive output or duty cycle and the fan is operating normal- ly, the Power Switch may be left on and the reset should occur within a 15-minute period. If the fan is not turning or the air intake louvers were obstructed, then the power must be switched off for 15 minutes in order to reset. The fan problem or air obstruction must also be corrected.

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2.Line surges over 500 VAC

3.Internal Component damage

4.Improper connections

V300-PRO

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Lincoln Electric SVM105-B service manual Protective Circuits, Overload Protection, Thermal Protection
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SVM105-B specifications

The Lincoln Electric SVM105-B is a state-of-the-art welding machine that represents a leap forward in welding technology, designed for both professionals and enthusiasts in the welding industry. This versatile machine combines robust performance with user-friendly features, making it suitable for a wide range of welding applications.

One of the key features of the SVM105-B is its advanced inverter technology. This allows for a lightweight design without compromising on power output. The inverter technology ensures a stable arc and precise control, enabling consistent weld quality across various materials, including mild steel, stainless steel, and aluminum. This feature is particularly beneficial for users who demand exceptional performance in both thin and thick materials.

The SVM105-B also boasts an impressive output range, typically between 10A to 105A, allowing for adaptability to different welding tasks. Its ability to seamlessly switch between DC and AC modes makes it an ideal choice for professionals working in diverse environments, facilitating operations such as TIG and stick welding. This versatility is further enhanced by its compatibility with various electrode types, ensuring a more efficient and effective welding process.

User safety and comfort have not been overlooked in the design of the SVM105-B. Equipped with an efficient cooling system, this machine effectively manages heat during prolonged use, ensuring durability and longevity. Additionally, its intuitive digital display provides real-time feedback on settings, making it easier for users to monitor parameters and make necessary adjustments on the fly.

The SVM105-B is built with portability in mind. Its compact and lightweight design makes it easy to transport, enabling welders to bring their equipment to job sites without hassle. Furthermore, the machine features sturdy handles that contribute to its ease of maneuverability, supporting the demands of both inside workshops and outdoor projects.

Moreover, Lincoln Electric places a strong emphasis on quality and reliability, and the SVM105-B is a testament to this commitment. The machine is constructed from durable materials designed to withstand the rigors of daily use, ensuring it remains a staple in any welder's toolkit for years to come.

In conclusion, the Lincoln Electric SVM105-B stands out with its combination of advanced inverter technology, versatile output, user-friendly interface, and robust construction. Whether for professional or hobbyist use, this welding machine meets a wide array of welding needs while providing excellent performance and durability.
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