The HCG680-K is a heavy-duty 680kW diesel generator set driven by a Cummins KTA38-G2A 12-cylinder water-cooled engine and equipped with an AVR-controlled SWT634C-680 alternator.
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Technical parameters of genset |
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Unit model: HCG680-K |
Steady-state voltage regulation (%): ≤±1 |
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Output power: 680KW |
Voltage fluctuation rate (%): ≤±0.5 |
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Power factor: COSΦ=0.8 (lagging) |
Transient voltage regulation rate (%): +20~-15 |
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Output voltage: 400V/230V |
Voltage stabilization time (s): ≤1 |
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Output current: 1224A |
Steady-state frequency adjustment rate (%): ≤±1 |
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Rated frequency: 50Hz |
Frequency fluctuation rate (%): ≤±0.5 |
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Rated speed: 1500rpm |
Transient frequency adjustment rate (%): +10~-7 |
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Fuel brand: (Standard) 0# light diesel (normal temperature) |
Frequency stabilization time (S): ≤3 |
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Dimensions:4500×1700×2400(L×W×H mm) |
Fuel consumption (100% load): 209g/kW·h |
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Unit weight: 8500kg |
Noise (LP7m): 95dB (A) |
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Diesel engine technical parameters |
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Speed: 1500rpm |
Cooling method: Closed water circulation cooling |
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Diesel engine model: KTA38-G2A |
Diesel engine power: 814KW |
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Cylinder number/lift structure: 12/Vtype |
Speed regulation mode: Electronic speed regulation |
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Cylinder stroke: 159×159 mm |
Intake mode: turbocharged |
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Compression ratio: 13.9:1 |
Overload capacity: 110% |
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Starting method: DC24V electric start |
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Generator technical parameters |
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Output factor: COSΦ=0.8 (hysteresis) |
Protection level: IP22 |
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Motor model: SWT634C-680 |
Wiring method: Three-phase four-wire, Y-type connection |
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Rated power: 680kW |
Regulation method: AVR (Automatic Voltage Regulator) |
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Rated voltage: 400V/230V |
Output frequency: 50Hz |
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Insulation grade: H |
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Low Noise Performance
Sound-Attenuated Canopy: Galvanized steel enclosure holds operational noise to ≤ 68 dB(A) at 7 meters.
Acoustic Foam: A 50 mm flame-retardant polyurethane foam lining reduces mid- to high-frequency engine resonance.
Exhaust Silencer: Internal residential muffler cuts exhaust sound by 35 dB(A) without increasing backpressure or reducing engine power.
Vibration Isolation: Rubber anti-vibration mounts set between the engine/alternator and base frame cut ground-transmitted vibration.
Electrical Compatibility
Heavy Motor Starting:
Delivers 3x to 5x inrush current capacity to start tower cranes, submersible pumps, and industrial air compressors.
Sensitive Electronics:
Steady-state voltage regulation within ±0.5% protects CNC machinery, data centers, and hospital PLCs from power surges.
Grid Coupling:
COS Φ = 0.8 lagging output connects directly to standard 400V/230V, 50Hz/60Hz three-phase facility distribution boards.
Transient Load Stability:
The electronic speed governor recovers frequency within ±0.5% during immediate 100% load steps.
Safety & Protection
Emergency Shutdown: Automatic engine stop activates instantly if oil pressure drops below 1.5 bar, coolant exceeds 95°C, or speed exceeds 110%.
Circuit Protection: 4-pole MCCB trips automatically during line overloads or short circuits.
Enclosure Rating: IP23 rainproof housing with an IP54 control cabinet keeps dust and rain away from live terminals.
System Grounding: Copper earth lug welded to the steel skid base allows fast ground rod connection on site.
OEM & Customization
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Customization Item |
Available Options |
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Engine Brand |
Cummins, Perkins, Volvo Penta, Deutz, Weichai, SDEC, Yuchai and others |
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Alternator Brand |
Stamford, Leroy Somer, Marathon, Mecc Alte, or equivalent |
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Rated Voltage |
220V, 230V, 380V, 400V, 415V, 440V and customized voltages |
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Frequency |
50Hz or 60Hz |
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Control System |
Manual, Automatic, AMF, ATS compatible, Remote Monitoring |
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Controller Brand |
Deep Sea, SmartGen, ComAp and others |
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Fuel Tank Capacity |
Standard or extended running time configurations |
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Enclosure |
Open type, Silent type, Super silent, Weatherproof |
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Trailer Option |
Fixed skid, Mobile trailer, Road tow trailer |
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Canopy Color |
Customized RAL color |
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Logo & Nameplate |
OEM logo, labels, model identification |
OEM & Customization
• Custom RAL powder coating, metal nameplates, and vinyl graphics for equipment dealers and rental yards.
• Factory-installed DeepSea or SmartGen digital controllers pre-programmed in English, Spanish, French, Portuguese, or Russian.
• Extended 12–24-hour base fuel tanks, Automatic Transfer Switches (ATS), and highway-ready mobile trailers.
Certifications
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ISO 9001 |
Quality Management System |
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ISO 14001 |
Environmental Management System |
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ISO 45001 |
Occupational Health & Safety Management |
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CE |
Compliance with applicable EU directives |
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IEC 60034 |
Rotating electrical machine standards |
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IEC 60204-1 |
Electrical safety of machinery |
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RoHS (if required) |
Restriction of hazardous substances |
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Third-party Factory Inspection |
SGS, TÜV, BV, or Intertek (upon request) |
Quality Control
Every unit runs a 2-hour step-load test (0%, 25%, 50%, 75%, 100%, and 110% load) following ISO 8528 standards.
Verification includes transient response (≤1.0s), phase rotation, fluid thermal stability, and zero-leakage checks under full thermal load.
Each serial number ships with a stamped Factory Test Certificate, wiring schematic, and individual load-test log.
FAQ
Q: Can the DeepSea or SmartGen controller be pre-configured for remote monitoring before shipment?
A: Yes, both controller platforms support remote telemetry and can be pre-configured with the customer's monitoring network parameters before shipment, upon request at the time of order.
Q: What is the typical warranty coverage on the Cummins engine versus the rest of the generator set?
A: The Cummins engine is covered by Cummins' standard global warranty, administered through its distributor network. The alternator, controller, and canopy are covered separately under Milestone's generator set warranty.
Q: What is the minimum order quantity and standard lead time for a 680kW unit?
A: Given the unit's size and customization options, the MOQ is one unit. Production lead time is confirmed at the time of order based on engine availability and the selected controller and trailer configuration.
Q: How long does the extended 12-24 hour fuel tank actually last under real operating conditions?
A: The 24-hour rating applies at 50% average load; at continuous 100% prime load, runtime on the largest tank option is approximately 14-16 hours before refueling is required.
Q: What is included in the Factory Test Certificate shipped with each unit?
A: The certificate includes the individual load-test log across all six load steps (0-110%), transient response results, phase rotation verification, and a thermal leak-check record, all tied to the unit's serial number.
