Pramac GGW 50 G 400V gas generator

ThePramac GGW 50 G 400V is an industrial gas generator designed for facilities where the power supply must be stable, reliable and capable of withstanding real-world operational loads. This is not a domestic ‘just-in-case’ solution, but a fully-fledged power unit for commercial, technical and infrastructure applications where three-phase power, a high margin of reliability and convenient long-term operation are required.

In LTP mode, the generator outputs 40.0 kW, and in PRP mode — 36.0 kW, operating on a 400/230 V, 50 Hz mains supply. This configuration is well suited for service centres, workshops, industrial premises, commercial buildings, logistics zones, technical facilities, pumping systems, ventilation equipment, automation and other three-phase loads where a reliable backup or primary power source is required.

One of the key advantages of the model is its ability to run on two types of fuel — natural gas and LPG. This provides greater flexibility when designing the power supply system and allows the generator to be adapted to a specific site. If there is a connection to natural gas, a stable, long-term power supply can be achieved without the need for complex fuel logistics. If the facility runs on LPG, the model also allows for the creation of an efficient stand-alone system. It is this flexibility that makes the generator particularly attractive for businesses and technical sites.

At the heart of the unit is a 4450 cm³ Generac 4-cylinder in-line engine. This is a naturally aspirated, liquid-cooled gas engine with electric start and stable operation at 1500 rpm. This configuration is well suited for stationary operation, where the generator is expected not just to start up, but to deliver smooth, quiet and sustained performance under a three-phase load. Liquid cooling adds stability during prolonged operation, which is particularly important for commercial and engineering applications.

The fuel parameters also provide a clear picture of real-world operation. At 100% load, consumption is 20.0 m³/h for natural gas or 6.0 m³/h for LPG. At 75% load, this is 15.8 m³/h or 5.0 m³/h respectively. This makes it possible, even at the planning stage, to estimate future costs, select the correct gas line and understand how well the model suits a specific operating mode.

The generator section is provided by the Mecc Alte ECP 32-1M/4 C — a brushless alternator with AVR DSR, insulation class H, IP23 protection rating and an electronic voltage regulation system. For the user, this means more stable operation under load, better suitability for technical and commercial tasks, and, overall, a more ‘advanced’ power section than in simple backup solutions.

The control system deserves a special mention. It features Power Zone Pro — a serious industrial-grade controller, not just a simple display panel. It is equipped with a 4.3-inch colour touchscreen display, providing access to the event log, diagnostics, settings, monitoring of key parameters, and remote monitoring via Modbus RTU, Modbus TCP/IP and Ethernet. On the screen, the operator can view three-phase voltage, current, kW, kVA, kVar, frequency, motor speed, coolant temperature, oil pressure, oil temperature, battery voltage, motor hours, warnings and faults.

Protection features are implemented at a high level, which is particularly important for stationary backup power. The generator monitors high and low oil pressure, coolant temperature and level, oil temperature, overload, voltage, frequency and current deviations, battery status, short circuits and other critical situations. This set of features makes the model safer both for the unit itself and for the load it powers.

Standard equipment already includes a reinforced air filter, an oil drain pipe, a fan guard, a stainless steel bellows, factory-filled oil and coolant, a redundant gas shut-off valve, an electronic pressure regulator, rich-burn mixture formation with lambda probe control, a closed-loop cooling system, a frame-mounted radiator, an electromagnetic starter, EFI, and vibration mounts for the engine and alternator. This creates the impression of a complete, well-designed unit, rather than simply an ‘engine with an alternator on a frame’.

The version in the soundproof enclosure looks best on the product sheet. It measures 2760×1130×1810 mm, weighs 1283 kg and has a noise level of 67 dB at 7 m / 96 dB LwA. This makes the generator more suitable for permanent installation near commercial and technical facilities, where not only power and reliability are important, but also controlled noise levels and neat workmanship.

ThePramac GGW 50 G 400V is a gas generator for those seeking a three-phase industrial backup without compromise: featuring a reliable Generac engine, a Mecc Alte alternator, liquid cooling, a robust controller, fuel flexibility and a more modern approach to stationary power supply. For businesses, engineering systems and technical facilities, this is truly a powerful and practical model in its class.