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LGK-300IGBT Inverter Air Plasma Cutter

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LGK-300IGBT Inverter Air Plasma Cutter

LGK-300IGBT Inverter Air Plasma Cutter

Inverter Air Plasma Cutting Machine

Inverter air plasma cutting machine LGK-300IGBT. Three-phase 380 V supply. Functions: Cut / Grid / Marking / Gouge. Design features - 100% duty cycle, suited to heavy industrial work - Current ramp-up technology that reduces torch consumable wear - Wide supply-voltage tolerance - Engineered dust-proof layout for high machine reliability - Compact, low-volume and lightweight construction, mountable on a CNC machine - Uses low-cost compressed air as the cutting gas, keeping running cost low - Accurate stepless presetting of cutting current - Plasma gas pressure detection and indication, plus a gas-test function for easy pressure setting - Automatic protection against over-temperature, over-voltage, under-voltage and phase loss Applications For manual and machine cutting of carbon steel, alloy steel and non-ferrous metals. Widely used in boiler and chemical plant construction, pressure-vessel fabrication, industrial power-plant installation, metallurgical and chemical construction, aerospace, automotive manufacturing and repair, and building decoration, and across all industries involving metal cutting. Why 300 A 300 A is specified for heavy plate and for gouging duties that would overload a smaller source. At this level the machine is normally installed permanently and paired with a CNC table, a water chiller and dedicated extraction. Typical users are heavy steel fabricators, shipyards and pressure-vessel manufacturers cutting plate well above 30 mm.

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Key Features

  • IGBT inverter main circuit engineered for sustained high-current output
  • 100% duty cycle on three-phase supply for continuous heavy industrial duty
  • Stepless current preset with ramp-up technology protecting torch consumables
  • Wide supply tolerance for demanding industrial power conditions
  • Plasma gas pressure detection and indication with gas-test function
  • Automatic over-temperature, over-voltage, under-voltage and phase-loss protection
  • Engineered dust-proof layout for reliability in harsh workshops
  • 300 A output for heavy plate cutting and gouging

Typical Applications

  • Extra-heavy plate cutting and heavy steel structures
  • Casting risers, gates and large forgings
  • Thick plate work for hydro, thermal power and mining equipment
  • Demolition, rescue and scrap dismantling

Selection & Setup Notes

300 A is for genuinely thick plate. Match three things at once — three-phase supply capacity, compressor flow and cooling capacity — or the source will never deliver its rating. See the inverter air plasma cutter range, and for heavy plate read cut quality troubleshooting.

Standards & Further Reading

External reference: ISO 9013 — Thermal cutting classification — ISO 9013 defines the quality classes for thermal cut surfaces (perpendicularity, bevel, dross).

Frequently Asked Questions

What does 300 A demand from the site supply?

A stable three-phase 380 V service, with transformer capacity and cable cross-section checked. Where voltage swings, add regulation or wide-tolerance measures upstream.

How do I avoid blowback damaging the nozzle when piercing thick plate?

Set pierce height and dwell correctly, use a progressive ramp-up curve and hold gas pressure near the top of the process window. Pierce is the highest-risk phase — tune it separately.

How does it differ from the 400 A?

Mainly in quality-cut capability on thicker plate and sustained heavy-duty capacity. If everyday plate stays under 65 mm, the 300 A usually gives better value.

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