Lincoln Electric 350-SA manual General Description, Design Summary

GENERAL DESCRIPTION

The 350-SA is a heavy duty engine-driven DC arc welding power source capable of providing constant current output for stick welding or DC TIG welding. With the addition of the optional Wire Feed Module for K1314-4, the 350-SA will provide constant voltage output for running the LN-25, LN-23P or LN-7 wire feeders. The Wire Feed Module is factory-installed on the K1314-5 350-SA.

The output rating of the 350-SA is 350 amperes at 34* arc volts at 25% duty cycle. Duty cycle is based on a ten minute period; thus, the welder can be loaded at rated output for 2.5 minutes out of every ten minute period.

*The output rating at 60% duty cycle is 250 amps at 40V.

DESIGN SUMMARY

Control Panel

Both the engine and the welder controls are located on one recessed panel at the exciter end of the machine. The welder controls consist of a five step “Current Range Selector” switch and a “Fine Current Adjustment” rheostat. Each welder is equipped with a “Start” button and an “Idler Control” switch. The Perkins diesel uses a “Thermostart” button, and has a “Stop” control.

On this panel is also mounted an engine temperature gauge, a battery charging ammeter, an oil pressure gauge, and the three prong grounded type auxiliary power receptacle.

Copper Shunt Windings

For long life and dependable operation.

Engine Idler

The 350-SA is equipped with an electric automatic engine idler. It automatically increases and decreases engine speed when starting and stopping welder or using auxiliary power. A built-in time delay permits changing electrodes before the engine slows to its low idle speed. The “Idler Control Switch” on the panel locks the idler in full speed position when desired.

Auxiliary Power

3.0kVA of nominal 115/230V, 60 Hz, AC1. (See Optional Features for Power Plug Kits).

(1)Output voltage is within ± 10% at all loads up to rated capacity.

Welder Enclosures

The complete welder is rubber mounted on a rugged steel base.

The output terminals are placed at the side of the machine so that they are protected by the door. The output terminals are labeled (+) and (-).

Remote Control

K924-1 (for K1314-4, -5 only) - (Field Installed). Provides a receptacle switch and remote control box with 100 ft cord for fine current and OCV adjustment at the welding site.

Cranking System

A 12 volt electric starter is standard.

Air Cleaner

Heavy duty two stage dry type.

Muffler

A muffler to reduce engine noise is standard on the diesel engine units.

Engine Hour Meter

A meter to record the hours of operation.

Diesel Engine Protection

The system shuts the engine down in the event of sudden low oil pressure or high coolant temperature.