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Table of Contents
Related Manuals for Kemppi Fitweld 300
Summary of Contents for Kemppi Fitweld 300
- Page 1 Service manual Fitweld 300 Version 1.2...
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Page 2: Technical Data
Technical data Supply voltage 3~400 V -15%/+10%, 50 / 60 Hz Rated power Max. 11 kVA Load capacity 40 ° ° ° ° C 300 A / 29 V 220 A / 25 V 180 A / 23 V 100% 140 A / 21 V Welding range 20 A / 11 V –... -
Page 3: User Interface
User interface Front Plate 1. Welding voltage adjustment 2. Wire feeding adjustment 3. ON signal lamp 4. Overheat protection lamp 5. No gas warning lamp 6. Euro connector Back Plate 7. Gas connector 8. Main switch 9. Ground cable connector 10 11 Spool room 10. - Page 4 Construction Gas flow A001 adjustment Gas pressure Gas valve switch P001 Z001 Wire feeder motor Z002 Cooling fans If machines cover plate screws thread fails you could change PT screws diameter to 5,5mm - 6mm. Note! Protective earth conductivity test must be performed at earth points on both the front and back plates...
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Page 5: Main Circuit Diagram
Main circuit diagram... -
Page 6: Main Circuit Card Z001
Main circuit card Z001 Functions and components: - EMC filtering - Primary rectifier and DC -link charging PTC - H –bridge (frequency 27kHz) - Gate transformers and gate drivers - Auxiliary voltage 15VDC - Over voltage sensing from DC-link - Two stage fan start - PTC protection alerts (signals comes from the main transformer and the secondary choke) Primary rectifier... - Page 7 Main circuit card Z001 Measurement points DC-link voltage (with Kemppi multipower): digital multimeter Auxiliary transformers 1. Feed 22 VAC to auxiliary transformers secondary secondary connector from Kemppi multipower (connector must be connected) connector 2. Measure value from DC-link test points by digital...
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Page 8: Main Components
Secondary rectifier Z002 Main components - Middle point connected full wave rectifier - Damping circuit reduces voltage stress of diodes - Overvoltage varistors protect diodes from ignition sparks Common point Measurement points Secondary diodes: 1. Measure diode branches one at the time from transformer (red test probe) to common point (black test probe) Values: 0,3 –... - Page 9 Wire feeder motor control card A001 Functions - Wire motor power feeding from machine’s secondary circuit by MOSFET half bridge - Wire feed speed maximum adjustment by trimmer - Spool room light (in different small card) NOTE! - When installing spare part card you have to check wire feeding speed maximum adjustment level - Before installing tilt and detach spool room light card Tilt and detach Adjustments...
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Page 10: Panel Card P001
Panel card P001 Functions - Supply voltage 24VDC filtering - Generating reference voltage 3,3VDC - Voltage adjustment by potentiometer - Wire feed adjustment by potentiometer - Start signal throughput (for optional usage) - Three leds: On, Overheat protection and No gas Gas pressure switch S002 Functions - Prevent welding while gas pressure under adjusted level... - Page 11 Installation of semiconductors IGBT mounting onto the heat sink The installation surfaces must be clean, even very small particles (0,050mm) between the surfaces increase the gap between heat sink and module, causing module overheating and possibly destruction. Heat transfer paste is spread as an even layer about 0,1 mm thick, onto the modules base plate.
- Page 12 Notes...
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