Miller Electric NT 456 CC, NT 456 CV manual Connecting Input Power, = GND/PE Earth Ground

Page 24

4-14. Connecting Input Power

9

 

= GND/PE Earth Ground

 

 

 

 

 

8

 

 

 

11

 

 

 

10

 

 

 

 

2

4

 

 

 

7

 

 

 

 

 

1

 

 

 

IMPORTANT

 

 

6

3

 

 

Input Contactor

 

 

L1 (U)

 

 

7

L2 (V)

 

4

 

L3 (W)

 

 

 

 

5

4

 

 

 

3

 

 

 

 

 

 

= GND/ PE Earth Ground

Tools Needed: 3/8 in

3/8 in

800 103-C / Ref. 801 116-A

OM-2243 Page 20

! Installation must meet all National and Local Codes − have only quali- fied persons make this installation.

! Disconnect and lockout/tagout in- put power before connecting input conductors from unit.

! Make input power connections to the welding power source first.

!Always connect green or green/ yellow conductor to supply grounding terminal first, and never to a line terminal.

See rating label on unit and check input voltage available at site.

1Input Power Conductors (Customer Supplied Cord)

Select size and length of conductors using Section 4-12. Conductors must comply with national, state, and local electrical codes. If applicable, use lugs of proper amperage capacity and correct hole size.

Welding Power Source Input Power Connections

2 Strain Relief

Route conductors (cord) through strain re- lief and tighten screws.

3Machine Grounding Terminal

4Green Or Green/Yellow Grounding Conductor

5Reed Switch (Ground Current Sensor) (Optional)

Connect green or green/yellow grounding conductor to welding power source grounding terminal first. If unit is equipped with optional ground current sensor, route grounding conductor through reed switch two times and connect to grounding termi- nal.

6Welding Power Source Line Terminals

7Input Conductors L1 (U), L2 (V) And L3 (W)

Connect input conductors L1 (U), L2 (V) and L3 (W) to welding power source line terminals.

Close and secure access door on welding power source.

Disconnect Device Input Power Con- nections

8Disconnect Device (switch shown in OFF position)

9Disconnect Device (Supply) Grounding Terminal

Connect green or green/yellow grounding conductor to disconnect device grounding terminal first.

10 Disconnect Device Line Terminals

Connect input conductors L1 (U), L2 (V) And L3 (W) to disconnect device line terminals.

11 Overcurrent Protection

Select type and size of overcurrent protec- tion using Section 4-12(fused disconnect switch shown).

Close and secure door on line disconnect device. Remove lockout/tagout device, and place switch in the On position.

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Contents OM-2243212 113T ProcessesDescription File MultiprocessFrom Miller to You Table of Contents Page Symbol Usage Arc Welding HazardsElectric Shock can kill HOT Parts can cause severe burnsFumes and Gases can be hazardous ARC Rays can burn eyes and skinWelding can cause fire or explosion Flying Metal or Dirt can injure eyesWelding Wire can cause injury Fire or Explosion hazardFalling Unit can cause injury Moving Parts can cause injuryPrincipal Safety Standards California Proposition 65 WarningsEMF Information About Implanted Medical DevicesSymboles utilisés UNE Décharge Électrique peut entraîner la mortDES Pièces Chaudes peuvent provoquer des brûlures graves LES Fumées ET LES GAZ peuvent être dangereuxLE Soudage peut provoquer un in cendie ou une explosion LE Bruit peut endommager l’ouïe LES Bouteilles peuvent exploser si elles sont endommagéesRisque D’INCENDIE OU D’EXPLO- Sion LA Chute DE L’APPAREIL peut blesserProposition californienne 65 Avertissements LES Fils DE Soudage peuvent provoquer des blessuresLE Soudage À L’ARC risque de provoquer des interférences Principales normes de sécurité Information EMFEn ce qui concerne les implants médicaux OM-2243 Nameplate Safety Symbols − Definitions− Installation SpecificationsDuty Cycle And Overheating CC Mode CV ModeVolt-Ampere Curves 100 200 300 400 500 600Selecting a Location Movement LocationDimensions And Weights DimensionsWeight Be careful when placing or moving unit over uneven surfaces Turn Off power before connecting to receptacleTipping VAC Receptacle And Circuit BreakersConnecting Weld Output Cables Weld Output Terminals And Selecting Cable SizesConnecting Remote Control Turn off power before conRemote 14 Receptacle Information SocketElectrical Service Guide Placing Jumper LinksConnecting Input Power Welding Power Source Input Power ConnectionsDisconnect Device Input Power Con- nections = GND/PE Earth Ground− Operation ControlsMeter Functions For CC/CV Models Lift-Arc TIG Procedure For CC/CV Models Touch Seconds Do not Strike Like a Match− Maintenance & Troubleshooting Routine MaintenanceDisconnect power before maintaining Disconnect input power be- fore opening rear access doorHE.L Voltmeter/Ammeter Help DisplaysTroubleshooting Trouble Remedy− Electrical Diagram Circuit Diagram For NT 456 CC/CV Models− Parts List Main AssemblyTHERMISTOR, NTC 10K OHM @ 25 DEG C 34IN Lead Panel, Front With Components 14 12 274Panel, Front With Components -1Item IGBT/Capacitor Assembly IGBT/Capacitor Assembly -1item 221Panel, Rear With Components Service Your distributor also givesSupport 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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