Könner & Söhnen KS 12-1E 1/3 ATSR engine-generator 8000 W, 400 V, 55 L tank, steel frame

The Könner & Söhnen KS 12-1E 1/3 ATSR engine-generator delivers rated power of 8000 W at a rated voltage of 400 V and is built for continuous use on sites that require stable three-phase output. This portable petrol generator is driven by a single-cylinder, air-cooled 18.5 HP engine and sits on a robust steel frame with two wheels for mobility. A 55 L steel fuel tank extends runtime between refuels, while an ergonomic control panel with LED display provides hour meter, frequency, voltage and oil alarm information. The unit supports automatic transfer switch (ATS) integration to enable automatic start and load transfer when mains supply fails.

Advantages

The generator uses a high-performance engine designed to meet European emissions and noise standards and is individually serialized for quality control and after-sales tracking. Its alternator features 100% copper winding to withstand heavy loads and provide longer service life compared with aluminum-wound units. The enlarged steel tank with fuel level indicator reduces refuelling frequency, and the ergonomic control panel with LED display and safety shutdown makes monitoring and operation straightforward. ATS compatibility adds hands-free backup capability for emergency power supply.

Suitable for

• Construction sites requiring reliable three-phase power for tools and equipment
• Workshops and small industrial facilities that need stable mains replacement during outages
• Emergency backup for buildings, remote sites or events where automatic transfer is desirable
• Temporary power supply for agriculture, pumping stations or lighting installations

Key specifications

• Rated power: 8000 W
• Rated voltage: 400 V (three-phase)
• Engine type: single-cylinder, air-cooled; power rating 18.5 HP
• Fuel type: petrol; fuel tank capacity 55 L (steel tank) with fuel level indicator
• Alternator: synchronous design with 100% copper winding
• Starting system: recoil start with electric start available on more powerful models
• Frame: steel frame with two wheels for portability
• Control panel: multifunctional LED display (hour meter, frequency, voltage, oil alarm) and emergency engine switch
• ATS: supports Automatic Transfer Switch integration for automatic start and stop

How to use

Position the generator on a level, well-ventilated surface and confirm the fuel level using the tank indicator before starting. Check engine oil and cooling air paths, and connect the generator to the load or ATS panel according to local electrical codes. Use the ergonomic control panel to monitor voltage, frequency and running hours; the oil alarm will alert you to low oil conditions. Start the engine using the easy start system; if the model includes electric start, use the starter switch. When finished, switch off connected loads and allow the engine to run briefly at no load before stopping to stabilize operating temperatures.

Usage recommendations

For safe and reliable operation, follow the manufacturer’s maintenance schedule: regularly check and change engine oil, inspect and clean air filters, verify tightness of fuel lines and terminals, and ensure the alternator connections are secure. When used as an emergency backup with an ATS, have the automatic transfer switch and wiring installed and inspected by a qualified electrician according to applicable regulations. Store fuel safely and refuel only with the engine stopped and cooled.