Miller Electric Big Blue 302P, Big Blue 452P manual Overload Protection

Page 55

9-8. Overload Protection

 

 

 

Y Stop engine.

 

 

 

 

. When a circuit breaker or fuse

 

 

 

 

opens, it usually indicates a more

 

 

 

 

serious problem exists. Contact

 

 

 

 

Factory Authorized

Service

 

 

 

 

Agent.

 

 

 

 

1

Fuse F1

 

 

 

 

2

Fuse F2

 

 

 

 

F1 and F2 protect the stator exciter

 

 

 

winding from overload. If F1 opens,

 

 

 

weld and generator power is low or

 

 

 

stops entirely. If F2 opens, weld out-

 

 

 

put is low or stops entirely. 4 kVA/kW

 

 

 

generator power is still available.

 

2

1

3

Circuit Breaker CB4 (Not

 

 

 

 

Shown)

 

 

 

 

4

Circuit Breaker CB5

 

 

 

 

 

(CC/CV Models Only)

 

 

 

 

5

Circuit Breaker CB6

 

 

 

 

 

(CC/CV Models Only)

 

 

 

 

6 Circuit Breaker CB10 (Not

 

9

 

 

Shown)

 

 

8

 

7

Circuit Breaker CB11

 

 

7

 

 

 

 

8

Circuit Breaker CB12

 

 

 

 

 

 

 

 

9

Circuit Breaker CB13

 

 

 

 

CB4 protects the welding arc drive

 

 

 

(dig) circuit. If CB4 opens, electrode

 

 

 

may stick to the workpiece more fre-

 

 

 

quently during low voltage (short arc

 

 

 

length) conditions. CB4 automatical-

 

 

 

ly resets when the fault is corrected.

 

 

 

CB5 protects the 24 volt ac output to

4

5

 

remote receptacle RC14, and 24 volt

 

output to field current regulator board

 

 

 

 

 

 

PC1 (CC/CV models only). If CB5

 

 

 

opens, weld output and 24 volt output

 

 

 

to RC14 stops. On units with optional

 

 

 

three-phase generator, generator

 

 

 

power output at receptacle RC5 also

 

 

 

stops if CB5 opens.

 

 

 

 

CB6 protects the 115 volt ac output to

 

 

 

remote receptacle RC14

(CC/CV

 

 

 

models only). If CB6 opens, 115 volt

 

 

 

output to RC14 stops.

 

CB10 protects the engine battery cir- cuit. If CB10 opens, the engine will not crank. CB10 automatically resets when the fault is corrected.

CB11 protects the engine wiring har- ness. On CC models, if CB11 opens the max OCV circuit does not work and open circuit voltage is variable at all times (see max OCV note under Weld Controls in Section 6-2). If CB11 opens on CV models, weld out- put stops (generator power is still available).

CB12 protects the field flashing cir- cuit. If CB12 opens, the generator may not excite at start-up and weld and generator power output may not be available.

CB13 protects the engine shutdown circuit. If CB13 opens, the engine cranks but does not start.

Press button to reset breaker.

802 170-D / Ref. 802 311

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Contents Processes OM-496Description From Miller to You Table of Contents 11-2 11-111-3 Standards DirectivesDeccon1 11/02 Deccon1 5/98 Sound Level InformationArc Welding Hazards Symbol UsageEngine Hazards Compressed Air Hazards Radiation can cause interference Principal Safety StandardsCalifornia Proposition 65 Warnings EMF InformationLES Fumées ET LES GAZ peuvent être dangereux Signification des symboles− Consignes DE Sécurité − Lire Avant Utilisation UN Choc Électrique peut tuerLE Bruit peut affecter l’ouïe LE Soudage peut provoquer un in- cendie ou une explosionDES Particules Volantes peuvent blesser les yeux DES Pièces Chaudes peuvent provoquer des brûlures graves’AIR Comprimé peut provoque r des blessures ’EXPLOSION DE LA Batterie peutDES Organes Mobiles peuvent provoquer des blessures LA Chaleur DU Moteur peut pro- voquer un incendieInformation sur les champs électromagnétiques Principales normes de sécurité− Definitions Starting Instructions + −Engine Are possible hazards asHot muffler and exhaust pipes Can cause severe burns. DoReturn To Table Of Contents CC Models CC/CV Models Manufacturer’s Rating Labels For CE Products− 50 h Std StdSymbols And Definitions Weld, Power, And Engine Specifications − SpecificationsDimensions, Weights, And Operating Angles Volt-Ampere Curves For CC Models Volt-Ampere Curves For CC/CV Models Stick ModeMIG Mode TIG ModeDuty Cycle And Overheating Fuel Consumption15 kVA/kW Three-Phase AC Output No Weld Load AC Generator Power CurveOptional Three-Phase Generator Curves 12 kVA/kW Single-Phase AC Output No Weld LoadAirflow Clearance − InstallationInstalling Welding Generator See Sections 5-2And Location GroundingWork like a Pro Using Lifting EyeTo Bolt Unit In Place Mounting Welding GeneratorSupporting The Unit Mounting SurfaceStop engine and let cool Installing Exhaust PipeCharger Activating The Dry Charge Battery If ApplicableWhen electrolyte is low, add Read and follow all instrucReinstall cover after connecting battery Connecting The BatteryConnect Negative − Cable Last Engine Prestart Checks Coolant Recovery TankSelecting Weld Cable Sizes Connecting To Weld Output TerminalsRef 862-A / 048 720-K / 802 Socket Connecting To Remote 14 Receptacle RC14 On CC/CV ModelsFront Panel Controls For CC Models See Section − Operating Welding Generator − CC ModelsEngine Starting Controls To Start Do not use ether. Using ether voids warrantyEngine Indicator Lights Do not switch under loadSet weld controls as shown to Remote Amperage Control On CC Models OptionalWeld Control/Arc Condition Information Label Example Combination Remote Amperage Control StickReturn To Table Of Contents Front Panel Controls For CC/CV Models See Section − Operating Welding Generator − CC/CV ModelsVoltage/Amperage Adjust Switch And Remote 14 Receptacle Use switch to select weld amperage rangeProcess/Contactor Switch Settings Process/Contactor Switch On CC/CV ModelsExample Combination Remote Amperage Control TIG Remote Voltage/Amperage Control On CC/CV Models OptionalOpen, contact Factory Autho − Operating Auxiliary EquipmentVolt And 240 Volt Receptacles At least once a month, run enRear Of Panel Three-Phase Power ConnectionClose panel opening if no connections are made to generator 240 V 15 a AC South African Receptacle RC1 Optional Generator Power ReceptaclesCircuit Breaker CB2 Circuit Breaker CB3 Maintenance Labels − Maintenance & TroubleshootingFor Non-CE Products Every 100 h Routine MaintenanceEvery 8 h Every 50 hChange Fuel Clean/Set InjectorsEvery 1000 h Every 2000 hDo not clean housing with air hose Servicing Air CleanerBy the warranty To clean air filterReinstall cleanout plug Tools Needed Inspecting And Cleaning Optional Spark Arrestor MufflerClose door Tools Needed 10 mm Adjusting Engine Speed On Standard ModelsMaximum Do not set engine speed higher than specifiedRpm max 61.6 Hz 1250 rpm 41.6 Hz Idle Speed AdjustmentWeld/Power Speed Adjustment Engine Speed No LoadServicing Fuel And Lubrication Systems Overload Protection Down before operating Diagnosing Causes Of Engine Fault ShutdownsDiagnostic Checks While Running Correct the cause of the shutWelding − CC Models TroubleshootingWelding − CC/CV Models Optional Three-Phase Generator Power CC/CV Models Only Standard Generator PowerEngine Air in fuel system. See engine manual Wiring harness and componentsShutdown switch is released Out Temperature is too high see Sections 5-7andReturn To Table Of Contents Circuit Diagram For CC Welding Generator − Electrical Diagrams215 296-B Circuit Diagram For CC/CV Welding Generator 215 297-B Wetstacking − RUN-IN ProcedureMent damage may occur From flammables Do not Perform Run-In Procedure Using Load BankProcedure at less than Stop engine Do not touch hot exhaustDo not perform run-in Run-In Procedure Using Resistance GridBank/grid From flammablesGrounding Generator To Truck Or Trailer Frame − Generator Power GuidelinesHas this symbol Selecting EquipmentUse ground device as stated in electrical codes Grounding When Supplying Building SystemsHow Much Power Does Equipment Require? Earth ground if supplyingFarm/Home Equipment Rating Starting Watts Running Watts Approximate Power Requirements For Industrial MotorsApproximate Power Requirements For Farm/Home Equipment Industrial Motors Rating Starting Watts Running WattsContractor Rating Starting Watts Running Watts Approximate Power Requirements For Contractor EquipmentKVA/HP x HP x Power Required To Start MotorHow Much Power Can Generator Supply? Single-Phase Induction Motor Starting RequirementsTypical Connections To Supply Standby Power Current Load Watts Amperes Selecting Extension Cord Use Shortest Cord Possible109 111 -4 or − Parts List85 Fig 118Dia Part Mkgs Description Quantity 209 Figures 13-2 Control Box Assembly − CC Models PLG3 Control Box Assembly − CC/CV Models PC7 195 Panel, Front w/Components − CC Models RC13 032 41 40 Panel, Front w/Components − CC/CV ModelsPanel, Front w/Components − CC/CV Models -1Item PC4, PC5 189 Generator -1Item Generator602 SCREW, .312−18x .75 hexwhd.66d stl pld slffmg tap−rw 601 Main Rectifier Assembly Page Page Your distributor also gives ServiceSupport Transportation Department Miller Electric Mfg. CoFor assistance in filing or settling claims, contact Your distributor and/or equipment manufacturer’s
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