250kW 312.5kVA Cummins Generator Marine Set NTA855-DM

Marine Generator Set Specifications

Specification	Parameter Details
Genset Model	CC-250M (Customizable based on your naming)
Prime Power	250 kW / 312.5 kVA
Standby Power	275 kW / 343.75 kVA
Rated Voltage	400/230V (Customizable: 220V/380V/415V/440V)
Rated Frequency	50Hz (60Hz / 1800RPM available upon request)
Rated Current	451 Amps
Phase & Connection	3 Phase, 4 Wire
Power Factor	0.8 (Lagging)
Marine Classification	CCS, BV, ABS, DNV-GL (Optional based on requirements)
Application	Marine Auxiliary Generator / Emergency Marine Power

Engine Specifications

Specification	Parameter Details
Alternator Brand	Stamford
Alternator Model	HCM434C / S4L1D-D41 (Marine Grade)
Rated Output	250 kW / 312.5 kVA
Exciter Type	Brushless, Self-excited (PMG Optional)
Voltage Regulation	AVR (Automatic Voltage Regulator) AS440 / MX341
Voltage Regulation Accuracy	≤ ± 1.0%
Insulation Class	Class H (With marine anti-moisture treatment)
Protection Grade	IP23 (IP44 available for marine applications)
Stator Winding	Double Layer Concentric
Winding Pitch	Two Thirds (2/3) Pitch

Alternator Specifications

Robust Marine Diesel Engine: Powered by the heavy-duty Cummins NTA855-DM marine engine, delivering reliable, continuous power for marine auxiliary applications and demanding offshore environments.
High-Efficiency Fuel System: Equipped with the proven Cummins PT fuel system, ensuring excellent fuel economy, lower emissions, and stable performance for this 250kW marine generator set.
Marine-Grade Stamford Alternator: Coupled with a genuine Stamford marine alternator, featuring Class H insulation, anti-condensation heaters, and specialized anti-corrosion epoxy coatings to withstand high-humidity and high-salinity marine conditions.
Advanced Intelligent Control: Integrated with the Deep Sea (DSE) intelligent controller, providing real-time monitoring of engine parameters, automatic start/stop functions, and comprehensive fault protection for safe vessel operation.
Optimized Cooling System: Features a marine-specific double-cooling system equipped with a freshwater heat exchanger and seawater pump, designed specifically for the 312.5kVA Cummins marine genset to maintain optimal engine temperatures during long voyages.
Global Classification Society Standards: Designed and manufactured to meet strict international maritime standards, with optional marine certificates including CCS, ABS, BV, and DNV-GL, ensuring compliance for global shipping.
Compact & Maintenance-Friendly Design: The in-line 6-cylinder layout of the NTA855-DM engine offers a compact footprint in the engine room, while accessible service points make routine maintenance and overhauls highly efficient.

Robust Marine Diesel Engine: Powered by the heavy-duty Cummins NTA855-DM marine engine, delivering reliable, continuous power for marine auxiliary applications and demanding offshore environments.
High-Efficiency Fuel System: Equipped with the proven Cummins PT fuel system, ensuring excellent fuel economy, lower emissions, and stable performance for this 250kW marine generator set.
Marine-Grade Stamford Alternator: Coupled with a genuine Stamford marine alternator, featuring Class H insulation, anti-condensation heaters, and specialized anti-corrosion epoxy coatings to withstand high-humidity and high-salinity marine conditions.
Advanced Intelligent Control: Integrated with the Deep Sea (DSE) intelligent controller, providing real-time monitoring of engine parameters, automatic start/stop functions, and comprehensive fault protection for safe vessel operation.
Optimized Cooling System: Features a marine-specific double-cooling system equipped with a freshwater heat exchanger and seawater pump, designed specifically for the 312.5kVA Cummins marine genset to maintain optimal engine temperatures during long voyages.
Global Classification Society Standards: Designed and manufactured to meet strict international maritime standards, with optional marine certificates including CCS, ABS, BV, and DNV-GL, ensuring compliance for global shipping.
Compact & Maintenance-Friendly Design: The in-line 6-cylinder layout of the NTA855-DM engine offers a compact footprint in the engine room, while accessible service points make routine maintenance and overhauls highly efficient.

Bespoke Manufacturing

Engineered to Your Exact Specifications

From standard backup power to complex multi-megawatt parallel systems, we customize every aspect of your generator set to ensure peak performance in your specific operational environment.

Open Skid Type

Standard configuration for indoor plant rooms. Features a heavy-duty fabricated steel base frame with built-in anti-vibration mounts.

Silent Canopy

Weatherproof and highly sound-attenuated (down to 65dB(A) @ 7m). Built with cold-rolled steel and fire-retardant acoustic foam.

Mobile Trailer

Single or dual-axle designs with mechanical/air brakes and lighting systems. Ideal for mining, construction, and rental applications.

Containerized

ISO standard 20ft/40ft containers for high-capacity units (500kVA+). Offers ultimate protection and simplifies global shipping.

Core Components

Alternator Upgrades

Partnering with Stamford, Leroy Somer, and Mecc Alte. We offer custom configurations including:

PMG Excitation System
IP44/IP55 Protection
Anti-condensation Heaters
Marine-grade Winding

Intelligent Controllers

Equipped with Deep Sea (DSE), ComAp, or SmartGen modules, enabling advanced power management:

Remote SCADA Monitoring
Auto Mains Failure (AMF)
Multi-unit Synchronization
Cloud-based Diagnostics

Comprehensive Solutions

Beyond hardware, our engineering team provides end-to-end services to ensure your power system integrates seamlessly into your project.

Extreme Climate Prep

Engine water/oil pre-heaters for cold regions, and sand-proof louvers with heavy-duty air filters for deserts.

Parallel & Sync Systems

Design and manufacture of synchronization panels to run multiple generator sets in parallel for large loads.

Custom ATS Panels

Automatic Transfer Switches tailored to your grid voltage, ensuring seamless switching during power outages.

Testing & Certification

Rigorous Factory Acceptance Testing (FAT) with load banks. Support for CCS, BV, and SGS third-party inspections.

Open Type

Length (L)

2850 mm

Width (W)

1000 mm

Height (H)

1760 mm

Dry Weight

2760 kg

Silent Type

Length (L)

3800 mm

Width (W)

1400 mm

Height (H)

2100 mm

Dry Weight

3950 kg

Dimensional & Assembly (DA) Drawing

Available upon request

250kW 312.5kVA Cummins Generator Marine Set NTA855-DM

Technical Data Sheet

Marine Generator Set Specifications

Engine Specifications

Alternator Specifications

Engineered to Your Exact Specifications

Open Skid Type

Silent Canopy

Mobile Trailer

Containerized

Core Components

Alternator Upgrades

Intelligent Controllers

Comprehensive Solutions

Extreme Climate Prep

Parallel & Sync Systems

Custom ATS Panels

Testing & Certification

Open Type

Silent Type

Dimensional & Assembly (DA) Drawing

Before confirming this configuration

Get a Custom Quote

Request a quote

250kW 312.5kVA Cummins Generator Marine Set NTA855-DM

Technical Data Sheet

Marine Generator Set Specifications

Engine Specifications

Alternator Specifications

Engineered to Your Exact Specifications

Open Skid Type

Silent Canopy

Mobile Trailer

Containerized

Core Components

Alternator Upgrades

Intelligent Controllers

Comprehensive Solutions

Extreme Climate Prep

Parallel & Sync Systems

Custom ATS Panels

Testing & Certification

Open Type

Silent Type

Dimensional & Assembly (DA) Drawing

Before confirming this configuration

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Get a Marine Quote

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