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dingbo@dieselgeneratortech.com
+86 134 8102 4441
Jul. 03, 2025
Technical data of 25kW/31.25kVA Diesel Generator Set
Genset Model: DB-25GF
Standby power: 27.5kW/34.375kVA
Prime power: 25kW/31.25kVA
Engine: Cummins 4B3.9-G12
Alternator: Shanghai Stamford GR180G
Controller: SmartGen HGM6110N-4G-G
| Configuration Features | |
| Engine：Cummins 4B3.9-G12, Meet GB 20891-2014 China Stage II emission requirements | Alternator: Single bearing, IP23 protection, H class insulation. |
| 40/50℃original water radiator, cooling fan, with fan safety cover | Air filter, fuel filter, oil filter |
| Chassis and vibration absorber | Standard control panel (integrated) |
| 24V charging generator | Gas exhaust bellows, gas exhaust elbows, industrial silencers and standard parts for connections |
| Electronic Governor | Accompanying Documentation |
| Maintenance-free lead-acid batteries and battery connection cables | |
| Different voltage levels | ||||||
| Voltage (V) | Frequency (Hz) | Phase | Power factor | Current( A) | Standby power | Prime Power |
| 440/254 | 50 | 3 | 0.8 | 41 | 27.5kW/34.375kVA | 25kW/31.25kVA |
| 415/240 | 50 | 3 | 0.8 | 43.5 | 27.5kW/34.375kVA | 25kW/31.25kVA |
| 400/230 | 50 | 3 | 0.8 | 45.1 | 27.5kW/34.375kVA | 25kW/31.25kVA |
| 380/220 | 50 | 3 | 0.8 | 47.5 | 27.5kW/34.375kVA | 25kW/31.25kVA |
Prime power (PRP): is available for an unlimited number of annual hours in variable load application, in accordance with GB/T 2820(eqv ISO 8528); A 10% overload capacity is available for a period of 1 hour within a 12-hour period of operation.
Standby power(ESP): is the maximum power limit for emergency use and cannot be overloaded, i.e. the fuel cut-off power.
| Engine Specifications | ||
| Manufacturer & engine Model： | Cummins 4B3.9-G12 | |
| Air intake system: | Naturally Aspirated | |
| Fuel system： | WF A Direct Injection | |
| Cylinders no. & Type： | 4 cylinders, in-line | |
| Displacement： | 3.9 L | |
| Bore x Stroke： | 102×120 mm | |
| Compression Ratio： | 18.0:1 | |
| Engine Speed： | 1500rpm | |
| Engine minimum power： | 27kW / 36hp | |
| Engine maximum power： | 30kW / 40hp | |
| Governor system： | Electronic Governor | |
| Noise: | 100dB | |
| Exhaust system | ||
| Exhaust Gas Flow： | 4.3m³/min | |
| Exhaust Gas Temperature： | 420°C | |
| Maximum Back Pressure： | 10 kpa | |
| Air intake/ Exhaust system | ||
| Maximum Intake Air Restriction: | 6.2 kPa | |
| Gas Flow Rate： | 2 m3/min | |
| Exhaust Gas Flow Rate： | 136 m3/min | |
| Fuel system | ||
| Fuel Consumption @ 100%prime power | 227g/kW·h | 7.4 L/h |
| Fuel Consumption @ 75%prime power | 248g/ kW·h | 6.1 L/h |
| Fuel Consumption @ 50%prime power | 276g/ kW·h | 4.5 L/h |
| Lubrication system | ||
| Minimum Required Lube System Capacity： | 11L | |
| Engine Oil Consumption rate： | ≤4g/kwh | |
| Sump Oil Capacity： | 8.9~9.5L | |
| Cooling System | ||
| Coolant Capacity - Engine Only： | 21L | |
| Maximum Top Tank Temperature for Prime Power： | 104°C | |
| Alternator Specifications | |
| Meet BS5000, VDE0530, NEMA MG1-22, IEC34, CSA C22 and AS1359 standards | |
| Technical Data | |
| Phase： | 3 |
| Wire connecting method： | Y type, 3 phase 4 wire |
| Bearing： | 1 |
| Power Factor： | 0.8 lag |
| Protection: | IP23 |
| Altitude requirements： | ≤1000m |
| Exciter type: | Brushless Self-Excited |
| Insulation/temperature rise class： | H/H |
| Waveform TIF： | <50 |
| Waveform THF： | <2% |
| Rated Capacity： | 25kW / 31.25kVA |
| Efficiency： | 90% |
| Genset Technical Specifications | |
| Voltage adjustment rate： | ≥±5% |
| State voltage regulation rate： | ≤±1% |
| Transient voltage deviation (100% sudden power reduction): | ≤+25% |
| Transient voltage deviation (sudden power increase)： | ≤-20% |
| Voltage stability time (100% sudden power reduction)： | ≤6S |
| Voltage stability time (sudden power increase)： | ≤6S |
| Frequency adjustment rate: | 0-5% |
| Steady-state frequency band: | ≤1.5% |
| Transient frequency deviation (100% sudden power reduction)： | ≤+12% |
| Transient frequency deviation (sudden power increase)： | ≤-10% |
| Frequency stability time (100% sudden power reduction)： | ≤5S |
| Frequency stability time (sudden power increase)： | ≤5S |
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E-mail: dingbo@dieselgeneratortech.com
WhatsApp: +86 134 8102 4441
Add.: No. 10 Kechuang Road, High tech Zone, Nanning, Guangxi, China
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