Képernyőkép 2026 06 05

LT-W20GF

Category:
20 kW diesel generator

Three-phase diesel generator designed for industrial and commercial use, with a reliable Cummins 4B3.9-G1 engine. Ideal for construction sites, warehouses, workshops and facilities requiring uninterrupted power supply.

  • 20 kW rated power, 400 V / 230 V three-phase output
  • Cummins 4B3.9-G1 engine – reliable, easy to service
  • Voltage regulation ≤ ±1%, frequency regulation ≤ ±1%
  • Electric start, forced water cooling
  • Low fuel consumption: ≤ 208 g/kW h
  • IP21 protection level, 710 kg weight

3 899 900 HUF + VAT

Support
  • 12-month warranty
  • Customization upon request
  • After-sales support

LT-W20GF — 20 kW diesel generator

Reliable industrial power supply with Cummins engine

The LT-W20GF is a 20 kW three-phase diesel generator set designed for industrial and commercial use. It is based on the 4B3.9-G1 engine from Cummins, one of the world's most reliable engine manufacturers — a four-cylinder, water-cooled, direct injection unit with a displacement of 3.9 liters. With its tight voltage and frequency adjustment, it provides a stable 400 V / 230 V output at 50 Hz, making it ideal for construction sites, warehouses, workshops and facilities requiring uninterrupted power supply.

Main benefits

  • 20 kW rated power for industrial and commercial applications
  • Cummins 4B3.9-G1 engine – globally recognized reliability and easy serviceability
  • Three-phase four-wire output, 400/230 V – compatible with EU networks and industrial equipment
  • Voltage regulation ≤ ±1%, frequency regulation ≤ ±1%
  • Forced water cooling – long-term operation even under demanding conditions
  • Electric start – fast and reliable starting without manual effort
  • Low fuel consumption: ≤ 208 g/kW h – low operating costs in continuous use

Technical parameters

Electrical outlet

Rated power 20 kW
Rated output voltage 400 V / 230 V
Rated current 36 A
Rated frequency 50 Hz
Power factor cos φ = 0,8 (késő)
Rated speed 1,500 rpm
Startup method Electric start

Voltage and frequency control

Stationary voltage regulation ≤ ±1%
Voltage surge ≤ ±0,5%
Transient voltage adjustment +20% / −15%
Voltage stabilization time ≤ 1 s
Stationary frequency setting ≤ ±1%
Frequency oscillation ≤ ±0,5%
Átmeneti frekvenciabeállítás +10% / −7%
Frequency stabilization time ≤ 3 s

Engine — Cummins 4B3.9-G1

Rated power 24 / 27 kW
Number of cylinders 4 (serial)
Bore × stroke 102 × 120 mm
Cylinder capacity 3.9 liters
Engine type In-line, water-cooled, four-stroke
Combustion mode Direct injection
Maximum exhaust back pressure 76 Hgmm
Fuel consumption ≤ 208 g/kWh
Cooling mode Forced water cooling
Lubrication system Pressure and splash lubrication

Generator and physical data

Number of phases Three-phase, four-wire
Protection grade IP21
External dimensions (L × W × H) 1620 × 710 × 1100 mm
mass 710 kg

Features

  • 🟠 Cummins Reliability: A 4B3.9-G1 motor világszerte elismert a tartósságáért és az egyszerű karbantarthatóságáért — az alkatrészek könnyen beszerezhetők. The 4B3.9-G1 engine is recognized worldwide for its durability and ease of maintenance — parts are readily available.
  • 🟠 Stable power supply: Tight voltage and frequency regulation ensures smooth operation of sensitive equipment even under varying loads.
  • 🟠 Permanent water cooling: The forced water cooling system enables long-term, continuous operation even in demanding environments.
  • 🟠 Custom configurations: Sound-absorbing covers, ATS automatic transfer switch and extended fuel tank are also available upon request.

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