3 phase generator KS 25-3LM


Max power (400V), kVA
Nominal power (400V), kVA
Current (max), А
Avg. working time (power 50%), h***
Fuel consumption***, l/h
4.1 (at 50% load)
Housing type
soundproof, moisture-proof, all-weather, anti-vandal
Noise level Lpa (7m)/Lwa, dB
Control unit
multifunctional digital controller
Controller model
Datakom D300 2g
Alternator type
Stamford type, synchronous, excitation system, AC brushless, four-pole
Engine type
Water-cooled four-cylinder four-stroke diesel engine
Engine brand
Engine model
Engine speed, U/min
Cooling type
Engine speed control
Fuel tank volume, l
Crank case volume, L
Coolant volume, l
Engine cylinder volume, cm3
Power output controller
electronic voltage regulator, smart AVR
Engine start
Automatic and Manual/External
Accumulator, A·h
Battery charger
Net dimensions (LxWxH), mm
1700 х 780 х 1000
Gross dimensions (LxWxH), mm
1730 х 810 х 1020
Net weight, kg 680
Gross weight, kg 683
Protection class
Nominal voltage tolerance
max. 5%
2 years
EAN code 4260405365722

*** Fuel consumption depends on many factors, such as load, fuel quality, season, altitude, technical condition of the generator.

Assembled in PRC.

SKU KS253LM Categories

The KS 25-3DE three-phase diesel power station of the HEAVY DUTY series of the German brand “Könner & Söhnen” is a reliable generator set with a maximum capacity of 25.3 kVA.

The KS 25-3DE diesel generator based on a liquid-cooled Laidong four-cylinder engine is a cost-effective solution from Könner & Söhnen. It conforms to all European quality standards, offers outstanding safety and is thus suitable for private and commercial use. In addition, the KS 25-3DE diesel generator is equipped with a four-pole brushless AC alternator with an automatic voltage regulator, a preheater for use in the cold season, a 57 l fuel tank offering a 14-hour autonomous operation without refueling (fuel consumption is 4.1 liters per hour at an average 50% load), connection for an automatic start/stop system, and an all-weather anti-vandal soundproof housing.

The KS 25-3DE diesel generator is a high-performance unit featuring a controller for all basic operating parameters and can supply both three-phase and single-phase consumers. With the company’s in-house developments and conformity to Könner & Söhnen requirements, all power stations have a margin of power against the declared specifications.

Könner & Söhnen diesel generators accommodate all your needs for both emergency and standby power supply to ensure sustainable power supply to residential buildings and small commercial facilities.


Depco’s low-speed engine runs at 1,500 rpm, which reduces fuel consumption, lowers sound pressure, and promotes longer service life through lower rpm. A mechanical engine speed control unit adjusts the engine speed and controls the quality of the electrical power produced by the generator.


The water-cooled engine system ensures reliable operation of the unit and prevents premature engine failure. The efficient cooling of the engine allows this generator set to be exposed to high ambient temperatures.


The engine preheater facilitates the start-up of the power station with no load on the engine, even in sub-zero temperatures during the cold season. The system automatically pre-heats the engine’s water jacket to the required temperature and maintains the engine temperature to facilitate the engine start-up in any weather.


All operations are controlled via a modern multifunctional digital controller. The controller provides monitoring of all operating indicators of the power station, convenient start-up and operation settings, monitoring of the battery status, engine speed and fuel supply adjusted to the load, and protection against overheating and low oil level. It also signals possible faults and reports the need for service maintenance.


Tipptasemel helikindel korpus vähendab oluliselt müra seadme töötamise ajal, parandab soojusjaotust ning kaitseb elektrijaama niiskuse ja kondensaadi sissepääsu, ebasoodsate ilmastikutingimuste ja rikkumiste eest. Elektrijaama suhteliselt kompaktne suurus annab selle paigutamiseks rohkem ruumi. Korrosioonivastane pulbervärvimine aitab kaasa seadme pikemale kasutuseale.

In addition, the low-noise low-speed engines mounted on anti-vibration pads contribute to quieter operation and reduce the load on the base.

The power station has an emergency stop button for quick engine shutdown in an emergency.


The housing has openings for transportation aids, facilitating shipment, transportation, and installation of the unit. Wide hinged doors on both sides of the housing provide unobstructed access to the unit parts for easy servicing of the main components of the diesel generator.


For failure-free operation in Europe, Könner & Söhnen diesel power stations undergo pre-run servicing and a test run with monitoring of all operating parameters at our in-house service center. A special loading bench is used to check the power output of the power station in different operating conditions and to fine-tune the electronics control unit.


Könner & Söhnen KS 25-3DE diiseljõujaam on vastupidav ja kulutõhus seade, mis sisaldab kõiki jätkusuutlikuks ja usaldusväärseks tööks vajalikke funktsioone ning kontrollerit kõigi põhiliste tööparameetrite jaoks. Tugevdatud osad ja mehhanismid, tugevdatud kinnitused ja liigendid vähendavad kulumist ja tagavad generaatorikomplekti pika ja usaldusväärse töö.

Meticulously monitoring every stage of Könner & Söhnen production, we have created a series of high-quality and reliable HEAVY DUTY Silent Diesel Generators that will serve our customers for many years to come.

All Könner & Söhnen power stations undergo rigorous testing and guarantee high performance and maximum productivity.

***Fuel consumption depends on many factors: load, fuel quality, season, altitude and generator technical condition.

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