THERMATOOL KEEVITUS AF CFI 350 kW VF

THERMATOOL HF WELDER CFI 350 kW VF

THERMATOOL High Frequency Welding CFI 350 kW VF

Including selectable frequency, in steps of 1kHz, range 180-300 kHz

Fully revised in 2026 by Thermatool specialists

Technical specifications

· Input voltage: 3 x 380 V

· Input current: 525 A

· Welding frequency: 180 - 300 KHz

· Output power: 350 kW

· Auxilirary service voltage: 24Vdc

· PLC Siemens S7

1. DC Power supply

• SCR Power Controller/Stabilizer - Provides constant output power for consistent weld quality.

• Rectifier Circuit achieving 6 pulse Rectification.

• Solid State Low Ripple Filter - Reduces AC line harmonics and switching transients that can affect weld quality.

• AUTOMATIC SPEED POWER CONTROL

Automatic Speed Power Control - Automatically ramps power up and down in line with mill speed, minimizes scrap on stopping and starting.

• PLC - Controls and monitors welder operation sequences and provides fault and running data for the Alphanumeric display

2. CFI 350KW VF Solid-state HF welder

• Compact rugged enclosure - sealed and internally cooled. Provides small footprint whilst ensuring reliable performance in harsh mill environments.

• Water cooled high frequency MOSFET power transistor modules – Modular design provides maximum flexibility, long equipment life and reduces time for maintenance.

• AUTOMATCH

Automatic Load Match – Fully automatic series and parallel load matching system which enables the welder to run at optimum efficiency with guaranteed frequency stability - Assists the tube producer in maintaining repeatability.

• High frequency capacitor bank - Designed specifically for the Tube Welding application. Capacitors deliver high power with low voltage to minimize flashovers at the induction coil.

• Water flow and temperature protection.

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• Output bus-bar system - Externally water-cooled for ease of maintenance.

INCLUDING SELECTABLE FREQUENCY

Selectable frequency, in steps of 1kHz, range 180-300 kHz

3. Remote control console

• Display - provides operator and maintenance personnel a constant display of fault and running data for maximum productivity.

• Power Control - Preheat and Main power potentiometers ensure precise setting of weld power and minimizes un-welded tube thus reducing scrap.

• Pushbuttons and Control Switches - For safe simple operation and protection of plant personnel. Analogue Indication Meters - Provide back-up for Alpha Numeric display.

4. Closed loop cooling system

• Plate Type Heat Exchanger - High efficiency reducing raw water consumption.

• Stainless Steel Water Pump & Plastic Pipework

• Automatic Temperature Control Valve - Maintains a constant water temperature thus avoiding condensation inside the equipment.

• Header tank with Level Switch.

Comprehensive equipment inspection, supervised by a Thermatool specialist.
Input voltage: 3 x 380 V
Input current: 525 A
Welding frequency: 180 - 300 KHz
Auxilirary service voltage: 24Vdc
PLC: Siemens 7