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Visit our website at
www.MillerWelds.com
CST 400
(230/460 And
460/575 Volt Models)
OM-208 474C
June 2002
Processes
Stick (SMAW) Welding
TIG (GTAW) Welding
Description
Arc Welding Power Source
R
CC Models

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Sommaire des Matières pour Miller CST 400

  • Page 1 OM-208 474C June 2002 Processes Stick (SMAW) Welding TIG (GTAW) Welding Description Arc Welding Power Source CST 400 (230/460 And 460/575 Volt Models) CC Models Visit our website at www.MillerWelds.com...
  • Page 2 We know you don’t have time to do it any other way. That’s why when Niels Miller first started building arc welders in 1929, he made sure his products offered long-lasting value and superior quality.
  • Page 3 TABLE OF CONTENTS SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING ......1-1.
  • Page 5 SECTION 1 – SAFETY PRECAUTIONS - READ BEFORE USING som _nd_4/98 1-1. Symbol Usage Means Warning! Watch Out! There are possible hazards with this procedure! The possible hazards are shown in the adjoining symbols. This group of symbols means Warning! Watch Out! possible Y Marks a special safety message.
  • Page 6 ARC RAYS can burn eyes and skin. BUILDUP OF GAS can injure or kill. D Shut off shielding gas supply when not in use. Arc rays from the welding process produce intense D Always ventilate confined spaces or use visible and invisible (ultraviolet and infrared) rays that can burn eyes and skin.
  • Page 7 1-3. Additional Symbols For Installation, Operation, And Maintenance FIRE OR EXPLOSION hazard. MOVING PARTS can cause injury. D Do not install or place unit on, over, or near D Keep away from moving parts such as fans. combustible surfaces. D Keep all doors, panels, covers, and guards D Do not install unit near flammables.
  • Page 8 1-5. EMF Information Considerations About Welding And The Effects Of Low Frequency 1. Keep cables close together by twisting or taping them. Electric And Magnetic Fields 2. Arrange cables to one side and away from the operator. Welding current, as it flows through welding cables, will cause electro- magnetic fields.
  • Page 9 SECTION 1 – CONSIGNES DE SECURITE – LIRE AVANT UTILISATION som _nd_fre 4/98 1-1. Signification des symboles Signifie Mise en garde ! Soyez vigilant ! Cette procédure présente des risques de danger ! Ceux-ci sont identifiés par des symboles adjacents aux directives. Ce groupe de symboles signifie Mise en garde ! Soyez vigilant ! Il y a des Y Identifie un message de sécurité...
  • Page 10 LES RAYONS DE L’ARC peuvent pro- LES ACCUMULATIONS DE GAZ ris- voquer des brûlures dans les yeux et quent de provoquer des blessures ou sur la peau. même la mort. Le rayonnement de l’arc du procédé de soudage D Fermer l’alimentation du gaz protecteur en cas de génère des rayons visibles et invisibles intenses non utilisation.
  • Page 11 1-3. Dangers supplémentaires en relation avec l’installation, le fonctionnement et la maintenance Risque D’INCENDIE OU DES ORGANES MOBILES peuvent D’EXPLOSION. provoquer des blessures. D Ne pas placer l’appareil sur, au-dessus ou à proxi- D Rester à l’écart des organes mobiles comme le mité...
  • Page 12 1-4. Principales normes de sécurité Safety in Welding and Cutting, norme ANSI Z49.1, de l’American Wel- Safe Handling of Compressed Gases in Cylinders, CGA Pamphlet P-1, ding Society, 550 N.W. Lejeune Rd, Miami FL 33126 de la Compressed Gas Association, 1235 Jefferson Davis Highway, Suite 501, Arlington, VA 22202.
  • Page 13 SECTION 2 – INTRODUCTION 2-1. Specifications RMS Amps Input at Rated Load Output, 60 Hz 3-Phase at NEMA Load Amperage Max. Open- Voltages and Class I Rating Range in Circuit 230 V 460 V 575 V CC Mode Voltage Rated Welding Output 300 A at 32 VDC, 3-Phase 5–400 A 90 VDC...
  • Page 14 2-3. Stick (SMAW) Volt-Ampere Curves Volt-ampere curves show minimum A. xx10 Stick VA Curve and maximum voltage and amper- age output capabilities of unit. Curves of other settings fall be- tween curves shown. 100A Soft 80A Stiff 100A Stiff 150A Soft 150A Stiff 80A Soft Amps...
  • Page 15 SECTION 3 – INSTALLATION 3-1. Selecting a Location 24 in (610 mm) Dimensions And Weight 76 lb (34.6 kg) 17 in (432 mm) 12-1/2 in (318 mm) Y Special installation may be Movement required where gasoline or volatile liquids are present – see NEC Article 511 or CEC Y Do not move or operate unit Section 20.
  • Page 16 3-2. Weld Output Receptacles And Selecting Cable Sizes Y ARC WELDING can cause Electromagnetic Interference. To reduce possible interference, keep weld cables as short as possible, close together, and down low, such as on the floor. Locate welding operation 100 meters from any sensitive electronic equipment. Be sure this welding machine is installed and grounded according to this manual.
  • Page 17 3-3. Circuit Breaker Circuit Breaker CB1 CB1 protects 24 volts ac portion of Remote receptacle from overload. Press button to reset breaker. 803 206 3-4. Electrical Service Guide CAUTION: INCORRECT INPUT POWER can damage this welding power source. This welding pow- er source requires a CONTINUOUS supply of 60 Hz (+10%) power at +10% of rated input voltage.
  • Page 18 3-5. Connecting Input Power Check input voltage available at site. The Auto-Link circuitry in this unit automatically links the power source to the primary voltage being applied. 230/460 unit can be connected to either 230 or 460 VAC input power. A 460/575 model can be connected to either 460 or 575 VAC input power.
  • Page 19 SECTION 4 – OPERATION 4-1. Front Panel Controls Power Switch energizes for 4 seconds and remains on in all High Temperature Shutdown Light positions except Remote Tig. Use switch to turn unit On/Off. When unit is first energized this indicator light illuminates for approximately 4 seconds Process Control (see Section 4-2) Output Indicator Light...
  • Page 20 4-3. Lift-Arc TIG Procedure With Process Switch in the Lift-Arc TIG position, start an arc as follows: TIG Electrode Workpiece Touch tungsten electrode to work- piece at weld start point, hold electrode to workpiece for 1-2 seconds, and slowly lift electrode. An arc will form when electrode is lifted.
  • Page 21 4-5. Remote 14 Receptacle Information Socket* Socket Information C L N 24 volts ac. Protected by circuit breaker CB1. 24 VOLTS AC 24 VOLTS AC Contact closure to A completes 24 volts ac contactor control circuit. Output to remote control; 0 to +10 volts dc. Remote control circuit common.
  • Page 22 SECTION 5 – MAINTENANCE & TROUBLESHOOTING 5-1. Routine Maintenance Y Disconnect power Maintain more often before maintaining. during severe conditions. 3 Months Repair Or Replace Replace Cracked Replace Damaged Or Torch Body Cracked Unreadable Cables Labels Repair Or Replace Cracked Cables And Cords Clean Tighten Weld...
  • Page 23 5-3. Troubleshooting Help Aids Output LED High Temperature LED 803 207 Front Panel Error High Temperature Output LED Status Possible Symptom Remedy Indication LED Status Normal On, unless in remote tig No problem Inverter problem, Primary Blink Not ready, current latch, Recycle input power and or Secondary voltage latch...
  • Page 24 SECTION 6 – ELECTRICAL DIAGRAMS 209 560-A Figure 6-1. Circuit Diagram For 230/460 Volt Models 208 473 OM-208 474 Page 20...
  • Page 25 208 473 Figure 6-2. Circuit Diagram For 460/575 Volt Models 208 473 OM-208 474 Page 21...
  • Page 26 SECTION 7 – PARTS LIST Hardware is common and not available unless listed. 803 205-C Figure 7-1. Parts Assembly OM–208 474 Page 22...
  • Page 27 Item Dia. Part Mkgs. Description Quantity Figure 7-1. Parts Assembly ....+175 148 Wrapper ............
  • Page 28 Item Dia. Part Mkgs. Description Quantity Figure 7-1. Parts Assembly (Continued) ....173 563 Inductor, Input ..........
  • Page 29 Notes OM-208 474 Page 25...
  • Page 30 Notes OM–208 474 Page 26...
  • Page 31 Effective January 1, 2002 (Equipment with a serial number preface of “LC” or newer) This limited warranty supersedes all previous Miller warranties and is exclusive with no other Warranty Questions? guarantees or warranties expressed or implied. Call LIMITED WARRANTY – Subject to the terms and conditions APT, ZIPCUT &...
  • Page 32 Distributor Address City State For Service Call 1-800-4-A-Miller or see our website at www.MillerWelds.com to locate a DISTRIBUTOR or SERVICE AGENCY near you. Always provide Model Name and Serial/Style Number. Contact your Distributor for: Welding Supplies and Consumables Options and Accessories...