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Lincoln Electric SVM199-A Thermal Protection, Protective Circuits, Over Current Protection

Models: SVM199-A

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THEORY OF OPERATION

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THERMAL PROTECTION

Two normally closed (NC) thermostats protect the machine from excessive operating temperatures. These thermostats are wired in series and are con- nected to the control board. One of the thermostats is located on the heat sink of the output rectifier and the other is located near the fan. (On later production machines this thermostat is located on the output choke) Excessive temperatures may be caused by a lack of cooling air or operating the machine beyond its duty cycle or output rating. If excessive operating tem- peratures should occur, the thermostats will prevent output from the machine. The yellow thermal light, located on the front of the machine, will be illuminated. The thermostats are self-resetting once the machine cools sufficiently. If the thermostat shutdown was caused by excessive output or duty cycle and the fan is operating normally, 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 are obstructed, then the power must be removed from the machine, and the fan problem or air obstruction cor- rected. The F.A.N. (fan as needed) system is con- trolled by the control board via a solid-state relay.

PROTECTIVE CIRCUITS

Protective circuits are designed into the INVERTEC® V450-PRO to sense trouble and shut down the machine before damage occurs to the machine's inter- nal components.

OVER CURRENT

PROTECTION

If the average current exceeds 590 amps, then the peak current will be limited to 100 amps until the aver- age current decreases to fewer than 50 amps.

UNDER/OVER VOLTAGE PROTEC- TION

A protective circuit is included on the control board to monitor the voltage across the input capacitors. In the event that a capacitor voltage is too high, or too low, the protection circuit will de-energize the input contactor. Machine output will be disabled and the “soft start” mode will be repeated. The protection circuit will prevent output if any of the following circumstances occur.

1.Capacitor conditioning is required. (May be required if machine has been off for a long period of time and is connected for high input voltage operation.)

2.Voltage across a capacitor exceeds 390 volts. (High line surges or improper input voltage con- nections.)

3.Voltage across a capacitor is under 70 volts. (Due to improper input voltage connections.)

4.Internal component damage.

INVERTEC® V450-PRO

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Lincoln Electric SVM199-A service manual Thermal Protection, Protective Circuits, Over Current Protection
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SVM199-A specifications

Lincoln Electric SVM199-A is a highly advanced welding machine that has garnered attention for its robust features and innovative technologies. This piece of equipment is tailored specifically for professionals in the welding industry, providing a range of functionalities that enhance productivity and efficiency.

One of the standout features of the SVM199-A is its Dual Voltage Input capability. This allows for flexibility in energy sources, making it suitable for a variety of job sites and applications. Users can easily switch between 208V and 230V, ensuring that they can operate efficiently regardless of the electrical setup available.

The machine is equipped with a powerful inverter-based design that significantly reduces its overall weight without compromising performance. This technology not only increases portability but also delivers greater energy efficiency, resulting in lower operational costs. The inverter design allows for quicker arc starts and smoother operation, which is especially beneficial for intricate welding tasks.

The SVM199-A boasts advanced digital controls that simplify the operation for both novice and experienced welders. The intuitive interface allows users to easily set and monitor welding parameters, facilitating optimal settings for various materials and thicknesses. This level of control ensures consistent weld quality and minimizes the risk of defects.

Another impressive characteristic of the SVM199-A is its multi-process functionality. It supports MIG, TIG, and Stick welding, making it versatile for various applications, from thin sheet metal work to heavy-duty repairs. This adaptability is ideal for contractors and welding professionals who often switch between different welding processes.

Additionally, the machine features a robust cooling system designed to prevent overheating during extended use. This capability not only prolongs the lifespan of the machine but also ensures reliable performance even in demanding conditions. The SVM199-A is built to withstand the rigors of frequent usage, emphasizing Lincoln Electric’s commitment to durability and quality.

Safety is paramount in welding operations, and the SVM199-A incorporates several safety features, including thermal overload protection and a protective housing design. These elements work together to safeguard both the machine and the operator, promoting a secure working environment.

In summary, Lincoln Electric's SVM199-A stands out in the welding equipment market due to its combination of advanced technology, user-friendly design, and exceptional performance capabilities. Whether for industrial applications or specialized projects, this machine is engineered to meet the rigorous demands of professionals, making it a valuable addition to any welding toolkit.