Terminal Strip Connections

B-8	OPERATION	B-8

Terminal strip TS2 located behind the hinged control panel on the front of the power source supplies 110-115V AC. A 15 amp circuit breaker protects this circuit. Note that this 110-115V AC is also available in the 14-pin connector on the Domestic and Export models.

To gain access to the terminal strips simply remote the #10 sheet metal screws from the perimeter of the welder nameplate. Tilt panel forward so it rests in a horizontal position. See Table showing Front View of 14-Pin Connector Receptacle for lead number func- tions.

Machine and Circuit Protection

The power source is thermostatically protected with proximity thermostats against overload or insufficient cooling. One thermostat is located on the nose of the center bottom primary coil and a second thermostat is attached to the lead connection the secondaries. Both thermostats are connected in series with 2-4 cir- cuit. If the machine is overloaded, the primary ther- mostat will open, the output will be zero, and the amber thermal protection light will be on.

The fan will continue to run. The secondary thermo- stat will open either with an excessive overload or insufficient cooling. The output will be zero and the amber protection light will be off.

115VAC GFCI RECEPTACLE

(Codes 11038 and higher)

The GFCI receptacle is located near the output studs and protected by a 15 amp circuit breaker.

Testing the GFCI Receptacle

a.) Turn the welder ON. Press the reset button fully. Plug a lamp or radio into the GFCI (and leave it plugged in) to verify that the power is ON. If there is no power, go to Troubleshooting.

b)Press the TEST button in order to trip the device.This should stop the flow of electricity, mak- ing the lamp or radio shut OFF. Note that the RESET button will pop out. If the power stays on, go to troubleshooting. If the power goes OFF, the GFCI is working properly. To restore power, press the RESET button.

c)Press the TEST button (then RESET button) every month to assure proper operation.

NOTE:

The GFCI receptacle is in a 115v circuit where the neutral is floating with respect to ground. Consequently if a GFCI tester is plugged into the GFCI receptacle, the tester will show that there is an "open ground". This indication of an "open ground" is normal and the GFCI will function properly in the event of a ground fault current as the GFCI is designed to do.

DC-400

DC-400 specifications

The Lincoln Electric DC-400 is a versatile and robust DC arc welding power source designed to meet the demands of various industrial applications. Known for its reliability and performance, the DC-400 is ideal for both professional welders and fabrication shops requiring robust equipment that can handle challenging welding tasks.

One of the main features of the DC-400 is its ability to provide a smooth, stable arc, which is essential for achieving high-quality welds. This welding machine is capable of delivering a wide amperage range, typically from 20 to 400 amperes, making it suitable for various welding processes, including MIG, TIG, and Stick welding. The unit's high output capabilities allow it to effectively weld a variety of materials, such as steel, stainless steel, and various alloys.

In terms of technology, the DC-400 integrates advanced power conversion technology that enhances energy efficiency while minimizing heat loss during operation. This not only contributes to lower operating costs but also ensures a longer service life for the machine. The DC-400 features a durable, rugged design, with a robust steel frame that can withstand the rigors of heavy industrial use while providing an IP23 rating for protection against moisture and dust.

Another notable characteristic of the DC-400 is its ease of use. The intuitive controls allow for quick adjustments to settings, enabling welders to easily adapt to different job requirements. The arc characteristics of the DC-400 can be fine-tuned to optimize performance for different welding applications, ensuring consistent results every time.

Moreover, the DC-400 is equipped with built-in safety features such as thermal overload protection, which prevents damage to the machine in case of prolonged operation under heavy loads. This feature enhances the safety of the operator and extends the life of the welding machine.

Overall, the Lincoln Electric DC-400 stands out as a reliable and efficient welding power source. Its combination of high-performance capabilities, advanced technology, and next-level usability makes it a popular choice in the industry. Whether for heavy fabrication, maintenance, or repair work, the DC-400 continues to prove itself as an indispensable tool for professional welders seeking quality and durability in their equipment.

OPERATION