Lincoln Electric SVM132-A service manual Power Source Connections, LN-8N and LN-8NE

A-3 INSTALLATION A-3

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MOUNTING LOCATION

The LN-8 can be operated as a free-standing unit, or it can be mounted to an undercarriage when portability is required. Refer to Accessories Section for avail- able under carriage, mounting platform, or wire reel stands.

POWER SOURCE CONNECTIONS

Use the type of power source required for the specific welding application.

CAUTION

Never operate a Lincoln Squirt welder wire feeder with a power source that has a jumper from #2 to #4 on the terminal strip, or with a power source without a contactor. To do so would defeat the ground lead protector circuit and could result in overheating of the electrical ground circuit to the wire feeder.

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A constant voltage power source is required for Innershield electrode and other open arc welding. It is often preferred for small, single pass submerged arc welds at fast travel speeds.

Formerly, a constant current power source was rec- ommended for most submerged arc welding. With the innovation of the new DC power sources, a special mode (CV Sub-Arc) is available and is preferred for most submerged arc welding.

The LN-8N and LN-8NE, when shipped, can only be used with a constant voltage power source. These models can be converted to weld with a constant cur- rent power source with the installation of the proper conversion parts.

The LN-8S and LN-8SE, when shipped, can weld with either a constant voltage or constant current power source. Be sure that both the power source and the wire feeder are properly set for the required procedure.

Refer to the “Input Cable Connections” section when connecting the LN-8 to a Lincoln power source.

LN-8N AND LN-8NE

Use a constant voltage type power source. If the LN-8 has been converted to weld with a constant current power source, use the instructions for the LN-8S.

1.If using a multi-purpose power source, be sure it is set for constant voltage welding per the instructions in the power source operating manual.

2.Connect the LN-8 input cable to the power source exactly as specified on the appropriate connection diagram, see Table A.2. Include any jumpers on the terminal strips as shown in the applicable diagram.

3.Connect a work lead of sufficient size and length per Table A.1, between the appropriate output terminal on the power source and the work. Ensure the connection to the work makes tight metal-to-metal contact.

TABLE A.1 – WORK LEAD SPECIFICATIONS

Copper Work Cable Length

Current Amps
60% Duty	25 ft	50 ft	100 ft
Cycle	(7.5 m)	(15 m)	(45 m)
300	0	0	000
400	00	00	0000
500	00	000	0000
600	000	000	Two 000

LN-8