Paralleled Converters, Cable Handling | Lincoln Electric SVM151-A

B-8

OPERATION

Return to Section TOC

Return to Master TOC

Disconnecting the Remote plug from this recepta- cle automatically transfers output control back to the panel Output Control (item (2) above).

Remote output On/Off switching can also be done through this Remote Control receptacle by per- forming the following wiring changes:

1.Making sure the input to the Converter is removed, remove the case wraparound.

2.Locate the 4-pin plug (P21) on the back panel of the control box module, and cut the jumper lead looping from the back of the plug. (Refer to the Wiring Diagram in the Electrical Diagrams section.) Insulate the cut lead ends and leave long enough to possibly splice back together again at some future time.

3.Replace the case wraparound.

4.Connect a user-provided remote switch be- tween pins D and E of an MS3106A-18-12P plug (Lincoln part no. S12020-27 with S12024-

1 cable clamp). See the diagram below:

A F E

B C D

Pin:	Remote Function:

AMax. of 10K pot

BWiper of 10K pot

CMin. of 10K pot

DOutput Switch

EOutput Switch

FNo connection

5.Connect this switch plug to the Multi-Weld 350 Remote Control Receptacle (10) with switch opened. Closing the switch activates the Converter output.

PARALLELED CONVERTERS

Multi-Weld 350 converters that are paralleled (see INTER- CONNECTION OF CONVERTERS in the Installation section) must each be set up in the same manner in order to manage the arc current drawn from each:

1.Set to CC mode with CC SLOPE switch set to

STICK/GOUGE.

2.Preset Output Controls of both paralleled Converters to ~1/2 desired total AMPS.

If arc current from each Converter gets too out of bal- ance (primarily a problem if trying to use CV mode) the hotter running Converter could go into current-limiting and/or Thermal shutdown (See OVER-TEMPERA- TURE SHUTDOWN in the Installation section.) This might then overload the other, or at least interrupt the operator’s process. However, no damage will occur to the Converters.

REMOTE CONTROL OF PARALLELED CONVERTERS

(FOR CC STICK/GOUGE MODE ONLY)

Full Range remote control can be accomplished with a separate optional Remote output control (see the Installation section) connected to each Converter. The current contribution of each Converter will depend on its remote output setting.

Partial Range remote control can be accomplished with a single Remote Control connected to the output Converter. The input Converter must be preset with its panel Output Control to below the minimum desired output range. The Remote Control, connected to the output Converter, will control its output to add to the preset level.

Remote Output On/Off switching may be set up for each of the paralleled Converters. Electrically isolated switches must be used to activate each separately but simultaneously.

TRANSPORTING AND STORAGE OF THE MULTI-WELD 350

CABLE HANDLING

The input and electrode cables are easily disconnect- ed from the quick-connect “pig-tails.” The Work lead can be reeled around the Multi-Weld 350 case cradled by the base skid handles, to which the clip can be secured.

MULTI-WELD 350