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IM904
® ®
July, 2006
INVERTEC S T T II (CE)
For use with machines having Code Numbers: 11366, 11367
Safety Depends on You
Lincoln arc welding and cutting
equipment is designed and built
with safety in mind. However,
your overall safety can be
increased by proper installation
... and thoughtful operation on
your part. DO NOT INSTALL,
OPERATE OR REPAIR THIS
EQUIPMENT WITHOUT READ-
ING THIS MANUAL AND THE
SAFETY PRECAUTIONS CON-
TAINED THROUGHOUT. And,
most importantly, think before
you act and be
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i i SAFETY WARNING CALIFORNIA PROPOSITION 65 WARNINGS Diesel engine exhaust and some of its constituents The engine exhaust from this product contains are known to the State of California to cause can- chemicals known to the State of California to cause cer, birth defects, and other reproductive harm. cancer, birth defects, or other reproductive harm. The Above For Diesel Engines The Above For Gasoline Engines ARC WELDING CAN BE HAZARDOUS. PROTECT YOURSELF AND OTHERS FROM POSSIBLE SERIOUS INJURY
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ii ii SAFETY ELECTRIC SHOCK can ARC RAYS can burn. 4.a. Use a shield with the proper filter and cover kill. plates to protect your eyes from sparks and 3.a. The electrode and work (or ground) circuits the rays of the arc when welding or observing are electrically “hot” when the welder is on. open arc welding. Headshield and filter lens Do not touch these “hot” parts with your bare should conform to ANSI Z87. I standards. skin or wet clothing. Wear dry, hole-free gloves to insulate hands. 4.b. Us
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iii iii SAFETY WELDING SPARKS can CYLINDER may explode cause fire or explosion. if damaged. 6.a. Remove fire hazards from the welding area. 7.a.Use only compressed gas cylinders If this is not possible, cover them to prevent containing the correct shielding gas for the the welding sparks from starting a fire. process used and properly operating Remember that welding sparks and hot regulators designed for the gas and materials from welding can easily go through small cracks pressure used. All hos
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iv iv SAFETY 5. Toujours porter des lunettes de sécurité dans la zone de PRÉCAUTIONS DE SÛRETÉ soudage. Utiliser des lunettes avec écrans lateraux dans les zones où l’on pique le laitier. Pour votre propre protection lire et observer toutes les instructions et les précautions de sûreté specifiques qui parraissent dans ce 6. Eloigner les matériaux inflammables ou les recouvrir afin de manuel aussi bien que les précautions de sûreté générales suiv- prévenir tout risque d’incendie dû aux étincelles
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v v for selecting a QUALITY product by Lincoln Electric. We want you to take pride in operating this Lincoln Electric Company product Thank You ��� as much pride as we have in bringing this product to you! Please Examine Carton and Equipment For Damage Immediately When this equipment is shipped, title passes to the purchaser upon receipt by the carrier. Consequently, Claims for material damaged in shipment must be made by the purchaser against the transportation company at the time the shipment
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vi vi TABLE OF CONTENTS Page Safety .....................................................................................................................i-iv Installation ......................................................................................................Section A Technical Specifications.....................................................................................A-1,A-2 Location ..........................................................................................
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A-1 A-1 INSTALLATION TECHNICAL SPECIFICATIONS –INVERTEC STT II (CE) (For Code 11366) INPUT- THREE PHASE ONLY STANDARD VOLTAGE INPUT CURRENT AT RATED OUTPUT 200/220/380/415/440/3/50/60 HZ 33/30/18/17/16 RATED OUTPUT DUTY CYCLE AMPS VOLTS AT RATED AMPS 60% Duty Cycle 225 29 100% Duty Cycle 200 28 OUTPUT CURRENT RANGE OPEN CIRCUIT VOLTAGE AUXILIARY POWER 1 2 Peak Current 0 - 450 Amps 85 VDC Maximum 115 VAC @ 4 Amps Background 0 - 125 Amps 42 VAC @ 4 Amps RECOMMENDED INPUT WIRE AND F
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A-2 A-2 INSTALLATION TECHNICAL SPECIFICATIONS –INVERTEC STT II (CE) (For Code 11367) INPUT- THREE PHASE ONLY STANDARD VOLTAGE INPUT CURRENT AT RATED OUTPUT 200/208/380/400/415/3/50/60 HZ 36/34/20/19/18 RATED OUTPUT DUTY CYCLE AMPS VOLTS AT RATED AMPS 60% Duty Cycle 225 29 100% Duty Cycle 200 28 OUTPUT CURRENT RANGE OPEN CIRCUIT VOLTAGE AUXILIARY POWER 1 Peak Current 0 - 450 Amps 88 VDC Maximum 115 VAC @ 4 Amps Background 0 - 125 Amps 42 VAC @ 4 Amps RECOMMENDED INPUT WIRE AND FUS
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A-3 A-3 INSTALLATION Read and understand entire Installation Section MACHINE GROUNDING AND HIGH before starting installation. FREQUENCY INTERFERENCE PROTECTION WARNING The machine may not be suitable for use in an envi- ELECTRIC SHOCK can kill. ronment where high frequency is present. For exam- � Only qualified personnel should ple do not place the machine in close proximity to perform this installation. “TIG” or “PLASMA” operations. To minimize high fre- � Turn the input power OFF at th
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A-4 A-4 INSTALLATION CASE BACK RATING PLATE INPUT CABLE ENTRY ACCESS & CABLE STRAIN RELIEF FIGURE A.1 CASE BACK INPUT CABLE INSTALLATION AND CON- 5. Connect the three phase line con- NECTION ductors to the power switch termi- nals labeled U, V and W. Tighten A cable strain relief is provided at the supply line entry the connections to 3.0 Nm. (27 in.-lb.) torque. and is designed to accommodate cable diameters of .310 - 1.070 in. (7.9 - 27.2 mm). On European models the strain relief is des
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A-5 A-5 INSTALLATION ACCESS DOOR 380 or 415 VAC 1. Open reconnect panel LOCATION (Codes 11366) access door on wraparound. 2. Move input voltage switch 4A to Voltage = 380-460V 380-415 OR position. * 3. Move lead “A” to 380-415 Terminal. * OR 200-208 380,400 or 415 VAC 1. Open reconnect panel (Codes 11367) access door on wraparound. (NOT PRESENT ON ALL MODELS) 2. Move input voltage switch * to Voltage = 380-415V position. 3. Move lead “A” to 380-415 FIGURE A.2 RECONNECT PANEL Termin
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B-1 B-1 OPERATION OPERATING INSTRUCTIONS Read and understand entire section before operating machine. GENERAL WARNINGS SAFETY PRECAUTIONS WARNING ELECTRIC SHOCK can kill. � Do not touch electrically live parts or electrode with skin or wet clothing. � Insulate yourself from work and ground. � Always wear dry insulating gloves. FUMES AND GASES can be dangerous. � Keep your head out of fumes. � Use ventilation or exhaust to remove fumes from breathing zone. WELDING SPARKS can cause fire or explos
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B-2 B-2 OPERATION � High temperature Class H insulation. GENERAL DESCRIPTION � Protection circuits and ample safety margins prevent The INVERTEC STT II (CE) is a 225-ampere inverter damage to the solid state components from tran- based arc welding power source specifically designed sient voltages and high currents. for the STT welding process. It is neither a constant current (CC) nor a constant voltage (CV) machine. It � Preset welding current capability. is a power source that delivers curre
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B-3 B-3 OPERATION OPERATIONAL FEATURES AND CONTROLS All operator controls are located on the case front of the INVERTEC STT II (CE). Refer to Figure B.1 for locations. 4 5 6 7 2 3 8 10 1 9 11 13 14 12 15 FIGURE B.1 CASE FRONT CONTROLS 1. POWER SWITCH: Turns output 3B. PEAK CURRENT DISPLAY METER: This power ON and OFF. This switch is a digital meter for displaying the preset ON A V also controls auxiliary power Peak Current. This meter displays in 1 available through the 14-pin Wire amp increm
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B-4 B-4 OPERATION 6. WIRE SIZE SELECT SWITCH: This toggle switch 13. 115V AUXILIARY POWER CIRCUIT BREAKER selects between electrode diameters of .035” (1 (Not on European Models): The 115 VAC mm) and smaller or .045” (1.2 mm) and larger. The supply is protected from excessive current .035” (1 mm) position provides improved perfor- draws with a 6 amp circuit breaker. When mance of smaller diameter wires at higher wire feed the breaker “trips” its button will extend. speeds. Depressing this butt
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B-5 B-5 OPERATION Adjusting this level to low will cause wire stubbing and WELDING PARAMETERS AND GUIDE- also poor wetting of the weld metal. This is similar to LINES a low voltage setting on a standard CV machine The INVERTEC STT II (CE) is neither a constant cur- Adjust Bead Shape using Background Current rent (CC) nor a constant voltage (CV) power source. In general, wire diameter will be increased one size compared to conventional (CV) power sources. The larger the wire diameter the higher
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B-6 B-6 OPERATION (Stainless Steel) Horizontal Fillet WELDING PROCEDURES FOR STT II - (See Table B.3 and B.4) (Steel) Horizontal Fillet (See Table B.1 and B.2) DIRECTION OF DIRECTION 75° TRAVEL OF 75° TRAVEL TOP VIEW TOP VIEW DIRECTION OF 45° 75° TRAVEL DIRECTION OF 75° 45° TRAVEL END VIEW FRONT VIEW Table B.3 END VIEW FRONT VIEW 90% He, 7.5% Ar, 2.5% CO2 Table B.1 Gas Shield (Set for Steel Mode) 100% CO2 Gas Shield (Set for Steel Mode) Plate Thickness “ (mm) 20 ga 14 ga 10 ga (0.9) (2.0) (3.2
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C-1 C-1 ACCESSORIES STT control board to accept PEAK and BACK- OPTIONS / ACCESSORIES GROUND inputs on this connector rather than from the front panel controls. If this short is removed, K940 SENSE LEADS: These leads are used to accu- the front panel controls will be active. By adding a rately sense arc voltage. One set is required for each switch between pins “J” and “B” a STT II power source. A 10 ft and 25 ft set are provid- “LOCAL/REMOTE” control switch can be created. ed as standard with
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C-2 C-2 ACCESSORIES 3. Connect the electrode lead (Twist-Mate) to (+) out- LN-742 or STT-10 WIRE FEEDER put terminal on STT II. CONNECTION INSTRUCTIONS 4. Connect the other end of electrode lead (Step #3) The LN-742 or STT-10 is the recommended wire feed- and the ARC SENSE LEAD (lead with ring lug, step er for use with the INVERTEC STT II (CE). Refer to #2) together to the gun block on the LN 742. the LN-742 or STT-10 Operator Manual for Wire Feed Operation. Refer to Figure C.2 or C.3 and fol
