Lincoln Electric IM679-A manual Parallel Operation, Quick Disconnect Plugs

A-4 INSTALLATION A-4

PARALLEL OPERATION

The V350-Pro are operable in parallel in CC mode. For best results, the currents of each machine should be reasonably well shared. As an example, with two machines set up in parallel for a 400 amp procedure, each machine should be set to deliver approximately 200 amps, not 300 amps from one and 100 amps from the other. This will minimize nuisance shutdown conditions. In general, more than two machines in parallel will not be effective due to the voltage require- ments of procedures in that power range.

To set machine outputs, start with output control pots and arc control pots in identical positions. Use the output control pots to balance the currents and main- tain the desired voltage or current. The arc control pots should be kept identical on the two machines.

QUICK DISCONNECT PLUGS

A quick disconnect system is used for the welding cable connections. The welding plug included with the machine is designed to accept a welding cable size of 1/0 to 2/0.

1.Remote 25mm (1 in.) of welding cable insulation.

2.Slide rubber boot onto cable end. The boot end may be trimmed to match the cable diameter. Soap or other lubricant will help to slide the boot over the cable.

WELDING CABLE

25 mm

BOOT

TRIM

1in.

3.Slide the copper tube into the brass plug.

4.Insert cable into copper tube.

SET SCREW

BRASS PLUG

COPPER TUBE

5.Tighten set screw to collapse copper tube. Screw must apply pressure against welding cable. The top of the set screw will be well below the surface of the brass plug after tightening.

6.Slide rubber boot over brass plug. The rubber boot must be positioned to completely cover all electrical surfaces after the plug is locked into the receptacle.

V350-PRO