Miller Electric MARK VIII-2 Parallel Module Connections, Separate Work Connections Common Work

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B. Parallel Module Connections

YREAD SAFETY BLOCKS at start of Section 4-6before proceeding. UNDERSIZED WELDING CABLES can cause fire.

Use single cables of adequate capacity to carry the total combined am- perage of the paralleled modules (see Section 4-4) .

Securely cover common connections with proper insulating materials.

Set the Amperage Adjustment controls on all paralleled modules to provide the same output.

Securely cover con- nection with proper insulating material.

1 Cable Restraint

Route all cables under cable restraint.

Separate Work Connections

See Section 4-4for proper cable size.

2Negative (−) Weld Output Terminal

3Electrode Holder Cable

4Positive (+) Weld Output Terminal

5Work Cable

6Connection Point

For Electrode Negative (Straight Polarity/DCEN), connect separate cables of same size and length from Positive (+) terminals to the work or to a suitable connection point con- necting to a single work cable. Connect separate cables of same size and length from Negative (−) terminals to a suitable connection point connecting to a single elec- trode holder cable.

For Electrode Positive (Reverse Polarity/DCEP), reverse cable con- nections.

Common Work Connections

Separate Work

Connections

Common Work

Connections

Tools Needed: 1-1/4 in

7

8

6

1

2

3

4

5

9

10

3

YFor common work connection, work cable must be able to carry combined weld output of all modules using the common work connection terminal (see Table 3-1for proper cable size). When using the common work con- nection terminal, all connections to the common work connection terminal must be of the same polarity.

7Common Work Connection Terminal

8Common Work Cable

See Table 3-1for proper size cable.

9Frame Connection Terminal

10Jumper Link

For Electrode Negative (Straight Polarity/DCEN), connect jumper link across Positive (+) terminal and Frame Connection terminal for each paralleled module. Connect separate cables of same size and length from Negative (−) terminals to a suitable connection point con- necting to a single electrode holder cable.

For Electrode Positive (Reverse Polarity/DCEP), connect jumper link across Negative (−) terminal and Frame Connection terminal for each paralleled module, and con- nect separate cables of same size and length from Positive (+) termi- nals to a suitable connection point connecting to a single electrode holder cable.

ST-085 152-D

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Contents OM-218 DescriptionFrom Miller to You Table of Contents Page Symbol Usage Marks a special safety messageArc Welding Hazards Electric Shock can killARC Rays can burn eyes and skin Welding can cause fire or explosionFlying Metal can injure eyes Buildup of GAS can injure or killCalifornia Proposition 65 Warnings About Pacemakers Principal Safety StandardsEMF Information Indique un message de sécurité particulier UNE Décharge Électrique peut entraîner la mortLES Fumées ET LES GAZ peuvent être dangereux LE Soudage peut provoquer un Incendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures gravesRisque D’INCENDIE OU D’EXPLO LA Chute DE L’APPAREIL peut blesser’EMPLOI Excessif peut SUR DES Organes Mobiles peuvent provoquer des blessuresPrincipales normes de sécurité En ce qui concerne les stimulateurs cardiaques− Specifications SpecificationsVolt-Ampere Curves Amperes Input at Rated Load Output, 60 HzDuty Cycle And Overheating For Each Module And Total SystemFor Main Transformer Overheating− Installation Selecting a Location And Moving Polyweld SystemMovement Location And AirflowDimensions, Weights And Base Mounting Hole Layout DimensionsWeight Selecting And Preparing Weld Output Cables 350 ft 400 ft 15m 30m 45 m 60 m 70 m 90 m 105 m 120 m Weld Cable Size 150 ft 200 ft 250 ft Connecting Weld Output Cables Connecting To Weld Output TerminalsRead Safety Blocks at start of -6before proceeding Standard Module ConnectionsCommon Work Cable Size Separate Work ConnectionsParallel Module Connections Separate Work Connections Common WorkRemote Amperage Control Receptacle Remote Contactor Control Connections OptionalConnecting Input Power Volts AC Duplex ReceptaclePositioning Jumper Links TE3 TE2Connecting Input Power Welding Power Source Input Power Con- nectionsClose and secure access door on welding power source Disconnect Device Input Power Connec- tionsElectrical Service Guide Time-Delay− Operation ControlsAmperage Adjustment Controls Power Switch Push Buttons And Pilot LightMin 35 a Max 125 a Set Switch Set Desired Maximum Amperage Hz Model Shown− Maintenance & Troubleshooting Routine MaintenanceMonths Overload ProtectionModule Fuse Links F11 And F12 Through F81 And F82 Blank Module PanelControl Fuses F3 And F4 Before inspecting, maintaining, or servicing TroubleshootingTurn Off polyweld system, and disconnect input power OM-218 − Electrical Diagram Circuit Diagram For Polyweld SystemSD-082 527-C Amperage Range Gas Type Polarity − Selecting and Preparing Tungsten ElectrodeSelecting Tungsten Electrode Preparing Tungsten For DC Electrode Negative Dcen Welding Torch Movement During Welding − Guidelines for TIG Welding GtawPositioining The Torch Positioning Torch Tungsten For Various Weld Joints Butt Weld And Stringer Bead Joint Lap Joint Corner Joint− Parts List Main Assembly Section aTP1 Main Assembly Section B CR1 194 Panel, Front Module w/Components -1Item Panel, Front Lower w/Components -1Item Panel, Front Lower w/ComponentsPage Support ServiceYour distributor also gives To locate a Distributor or Service Agency visit Miller Electric Mfg. CoFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s
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