Processes
STR 400
OM-271 435A
2015−02
Description
Arc Welding Power Source
Stick (SMAW) Welding
www.MillerWelds.com
TIG (GTAW) Welding
CE
Page 1: ...Processes STR 400 OM 271 435A 2015 02 Description Arc Welding Power Source Stick SMAW Welding www MillerWelds com TIG GTAW Welding CE...
Page 2: ...ucts Please take time to read the Safety precautions They will help you protect yourself against potential hazards on the worksite We ve made installation and operation quick and easy With Miller you...
Page 3: ...Duty Cycle and Overheating 9 3 5 Volt Ampere Curves 10 SECTION 4 INSTALLATION 10 4 1 Selecting A Location 10 4 2 Tipping 11 4 3 Weld Output Terminals and Selecting Cable Sizes 12 4 4 Weld Output Termi...
Page 4: ...use of certain hazardous substances in electrical and electronic equipment Standards IEC 60974 1 Arc Welding Equipment Welding Power Sources edition 3 2005 07 IEC 60974 10 Arc Welding Equipment Elect...
Page 5: ...uch as sitting kneeling or lying or when there is a high risk of unavoid able or accidental contact with the workpiece or ground For these conditions use the following equipment in order presented 1 a...
Page 6: ...perly prepared according to AWS F4 1 and AWS A6 0 see Safety Standards Do not weld where the atmosphere may contain flammable dust gas or liquid vapors such as gasoline Connect work cable to the work...
Page 7: ...PARTS can injure Keep away from moving parts such as fans Keep all doors panels covers and guards closed and securely in place Have only qualified persons remove doors panels covers or guards for mai...
Page 8: ...NFPA Standard 51B from National Fire Protection Association Quincy MA 02269 phone 1 800 344 3555 website www nfpa org OSHA Occupational Safety and Health Standards for General Indus try Title 29 Code...
Page 9: ...by insulating yourself from work and ground Safe3 2012 05 Disconnect input plug or power before working on machine Safe5 2012 05 Keep your head out of the fumes Safe6 2012 05 Use forced ventilation or...
Page 10: ...r local distributor for further information Safe37 2012 05 3 1 Safe49 2012 05 Move jumper links as shown on inside label to match input voltage at job site Include extra length in grounding conductor...
Page 11: ...Welding SMAW Input Remote Constant Current CC X Duty Cycle I1 Rated Supply Current I2 Rated Welding Current U0 Rated No Load Voltage Average U1 Rated Supply Voltage U2 Load voltage Line Connection Sc...
Page 12: ...general public access is prohibited or regulated in such a way as to be similar to occupational use by an expert or an instructed person Wire feeders and ancillary equipment such as torches liquid coo...
Page 13: ...s for unit to cool Reduce amperage or duty cycle before welding NOTICE Exceeding duty cycle can damage unit and void warranty 3 5 Minutes Welding 6 5 Minutes Resting Overheating 0 15 A or V OR Reduce...
Page 14: ...40 45 50 55 60 65 70 80 85 90 95 100 75 SECTION 4 INSTALLATION 4 1 Selecting A Location Special installation may be required where gasoline or volatile liquids are present see NEC Article 511 or CEC...
Page 15: ...OM 271 435 Page 11 4 2 Tipping Do not move or operate unit where it could tip 956142993_5 A Notes...
Page 16: ...1 0 70 2 0 95 3 0 120 4 0 120 4 0 250 35 2 50 1 60 1 0 70 2 0 95 3 0 120 4 0 2x70 2 ea 2 0 2x70 2 ea 2 0 300 50 1 60 1 0 70 2 0 95 3 0 120 4 0 2x70 2 ea 2 0 2x95 2 ea 3 0 2x95 2 ea 3 0 350 60 1 0 70...
Page 17: ...command signal from re mote control The remaining sockets are not used 4 6 Typical Connections For DCEP Stick SMAW Welding 956142993_1 A 1 Negative Weld Terminal 2 Positive Weld Terminal 3 Remote 14...
Page 18: ...1 Remote Hand Control 2 Remote Foot Control 3 Negative Weld Terminal 4 Positive Weld Terminal 5 Remote 14 Receptacle For Direct Current Electrode Negative DCEN connect electrode holder cable to Negat...
Page 19: ...Max Recommended Input Conductor Length In Meters Feet 55 179 Min Grounding Conductor Size In mm2 AWG 4 6 10 Power cord supplied with the unit is sized for 230V operation Larger power cord may be requi...
Page 20: ...OM 271 435 Page 16 4 9 Connecting 3 Phase Input Power input2 2012 05 956142993_1 A GND PE Earth Ground L1 2 1 L2 L3 3 3 4 5 6 7 Tools Needed...
Page 21: ...sconnect Device switch shown in the OFF position 3 Green Or Green Yellow Grounding Conductor 4 Disconnect Device Grounding Terminal 5 Input Conductors L1 L2 And L3 6 Disconnect Device Line Terminals C...
Page 22: ...Switch Remote output is always On in TIG mode Hot Start function for Stick welding is disabled in TIG mode 5 TIG GTAW Welding Indicator Light 6 Power On Pilot Light 7 Welding Current Indicator 8 High...
Page 23: ...lectrode sticks to workpiece use a quick twist to free it 1 2 3 5 3 Scratch Start TIG Ref WM Marketing This starting method is not ac ceptable for critical applications since small tungsten particles...
Page 24: ...e If any of these displays are shown check input power con nections If trouble continues contact a Factory Authorized Service Agent 1 2 3 AL1 AL2 AL3 6 3 Troubleshooting Trouble Remedy No weld output...
Page 25: ...Use dry properly stored electrodes Low weld output with no control Check position of Amperage Control see Section 5 1 Limited output and low open circuit voltage Check incoming power for correct volta...
Page 26: ...OM 271 435 Page 22 SECTION 7 ELECTRICAL DIAGRAMS Figure 7 1 Circuit Diagram For STR 400...
Page 27: ...OM 271 435 Page 23 956142994 A...
Page 28: ...Retaining Wheel 2 8 156009127 Washer Round hooking For Handle 2 9 056020071 Knob for hose 25 mm dia 2 10 156002047 Handle 2 11 156018114 Nut Locking 2 12 156009128 Washer flat 10x30 6 13 156012132 Ha...
Page 29: ...9037 Clamp Cable D 16 23 1 2 PC2 058075017 PCB Filter 1 3 156005130 Support Voltage Change Board 1 4 L1 057098019 Choke 60x70x180 Al 1 5 T1 058021160 Transformer 380 400V 60x80 Al 1 6 TP1 056159026 Th...
Page 30: ...able D30 1 29 S1 056067210 Switch 32 A 1 To maintain the factory original performance of your equipment use only Manufacturer s Suggested Replacement Parts Model and serial number required when orderi...
Page 31: ...ntrollers Powered Air Purifying Respirator PAPR Blower Unit No Labor Racks Running Gear and Trailers Subarc Wire Drive Assemblies Water Coolant Systems Work Stations Weld Tables No Labor 5 6 Months Pa...
Page 32: ...y Zip Postal Code Please complete and retain with your personal records Owner s Record Always provide Model Name and Serial Style Number Contact a DISTRIBUTOR or SERVICE AGENCY near you Welding Suppli...
