LGK-100: 100A IGBT Inverter Air Plasma Cutter — Heavy-Duty Plasma Cutting Equipment
LGK-100
100A Heavy-Duty Plasma Cutting Machine
Part of the Plasma Cutters product line. Designed and manufactured in Qingdao, China with IGBT inverter technology for reliable industrial performance. CE certified for global export.
Typical Applications: 35mm cut, shipyard plate prep, structural steel
LGK-100 Air Plasma Cutter
The LGK-100 is a three-phase 100A industrial plasma cutter purpose-built for heavy fabrication, shipyard plate preparation, and structural steel processing. With a quality cut capacity of 35 mm on mild steel and maximum severance of 50 mm, it handles plate thicknesses that smaller machines cannot touch. The 380V three-phase IGBT inverter power source delivers an 80% duty cycle at the full 100A / 120V rated output — meaning 8 minutes of continuous cutting in every 10-minute cycle at 40 degrees Celsius ambient temperature — making it suitable for production-line CNC cutting operations.
The LGK-100 marks the entry point into the heavy-duty tier of the LGK series, where three-phase power becomes mandatory and duty cycles climb to 80% and above. It is equipped with a PT-100 machine torch rated for 100A, a high-flow air filtration regulator, and a heavy-gauge steel chassis with integrated cable management. The high no-load voltage of 320V ensures rapid pilot arc transfer on thick, mill-scale-covered plate, while the built-in grid cutting mode with automatic arc voltage tracking provides consistent cut quality when the torch-to-workpiece distance varies.
Detailed Specs — LGK-100
| Parameter | Specification |
|---|---|
| Model | LGK-100 |
| Rated Input Voltage (V) | AC 380V ±15% |
| Phase | Three-Phase |
| Frequency (Hz) | 50 / 60 |
| Rated Input Power (kVA) | 15.2 |
| Rated Output Current (A) | 100 |
| Output Current Range (A) | 30 – 100 |
| No-Load Voltage (V) | 320 |
| Rated Load Voltage (V) | 120 |
| Rated Duty Cycle | 80% @ 100A / 120V (40°C) |
| Max Cutting Thickness – Quality (mm) | 35 |
| Max Cutting Thickness – Severance (mm) | 50 |
| Plasma Gas | Compressed Air (0.45 – 0.65 MPa) |
| Air Flow Requirement (L/min) | ≥ 200 |
| Arc Starting Method | High-Frequency Pilot Arc |
| Insulation Class | F (155°C) |
| Protection Class (IP) | IP21S |
| Power Factor (cos φ) | ≥ 0.93 |
| Efficiency (%) | ≥ 86 |
| Dimensions L × W × H (mm) | 560 × 280 × 420 |
| Net Weight (kg) | 18 |
| Built-in Compressor Option | No |
| CNC Interface | Standard (arc-on / divided voltage) |
| Torch Type | PT-100 / AG-100 |
| Cooling Method | Forced Air (Dual Fan Cooled) |
| Certification | CE (CSA, EAC available) |
Where the LGK-100 Excels
Shipyard Plate Preparation
Edge preparation and bevel cutting on hull plates up to 35 mm. The 80% duty cycle supports shift-long CNC cutting of nested parts from ship-grade steel plate.
Structural Steel Fabrication
Cutting gusset plates, base plates, stiffeners, and connection details for commercial and industrial steel structures. Copes and beam penetrations cut cleanly without secondary grinding.
Pressure Vessel Manufacturing
Precision cutting of shell courses, head profiles, and nozzle openings in pressure vessel fabrication. Clean edges minimise weld prep time on longitudinal and circumferential seams.
Bridge Component Fabrication
Cutting bridge girder stiffeners, diaphragm plates, and splice plates from 20–35 mm structural steel. Reliable arc transfer on weathered and primed plate surfaces.
Heavy Equipment Manufacturing
Cutting chassis frames, boom sections, and bucket components for excavators, loaders, and bulldozers. Handles high-strength wear plate grades up to HARDOX 450.
Wind Tower Section Cutting
Precision CNC cutting of wind tower door frames, internal platform brackets, and flange ring segments. Consistent kerf width across full 8-hour production shifts.
LGK Series — Amperage Comparison
| Parameter | LGK-60 | LGK-80 | LGK-100 | LGK-120 | LGK-160 |
|---|---|---|---|---|---|
| Rated Current (A) | 60 | 80 | 100 | 120 | 160 |
| Input Voltage (V) | 220V 1-Phase | 220/380V | 380V 3-Phase | 380V 3-Phase | 380V 3-Phase |
| Quality Cut (mm) | 15 | 25 | 35 | 45 | 55 |
| Max Severance (mm) | 25 | 35 | 50 | 60 | 80 |
| Duty Cycle | 60% @ 60A | 60% @ 80A | 80% @ 100A | 80% @ 120A | 100% @ 160A |
| Weight (kg) | 8 | 12 | 18 | 25 | 40 |
| Built-in Compressor | Optional | Optional | No | No | No |
| Best For | Light fab, HVAC, mobile | Medium fab, shops | Structural, shipyard | Heavy plate, mining | Foundry, heavy industry |
Why Choose the LGK-100
80% Duty Cycle at Full 100A
Rated for 8 minutes of continuous cutting in every 10-minute cycle at 40 degrees Celsius. This production-grade duty cycle keeps CNC tables running with minimal cool-down interruptions, directly improving daily throughput.
50 mm Severance Capability
Can sever steel plate up to 50 mm thick when edge-starting, making it suitable for demolition, scrap processing, and one-off piercing beyond its quality cut range. The 320V no-load voltage ensures arc transfer at these extreme thicknesses.
Dual-Fan Forced Air Cooling
Two independent cooling fans with thermally optimised airflow paths maintain IGBT module temperatures well within safe operating limits. The dual-fan design provides redundancy — if one fan fails, the machine continues operating at reduced duty cycle until the next maintenance interval.
Grid Cutting & Arc Voltage Tracking
Built-in grid cutting mode automatically compensates for variable torch standoff distance on uneven or warped plate. This feature is critical for CNC cutting of flame-cut or previously welded plates where surface flatness cannot be guaranteed.
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