CUMFA POWER™ NT855-SP400 (Silent Box)

Standard Power Series · Acoustic Enclosure · CUMFA Edition

The CUMFA POWER™ NT855-SP400 Silent Box encloses the full NT855 platform in a multi-layer acoustic canopy engineered for ultra-low sound output. Designed for outdoor, urban, residential, and noise-sensitive environments, it delivers a verified continuous output of 320 kW (400 kVA Prime) without compromising continuous S1 duty performance or serviceability

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Application: Mid-Scale Industrial
Category: Standard Power
Engine Platform: Cummins NT855-G4
Enclosure: Multi-Layer Acoustic Canopy

The CUMFA POWER™ NT855-SP400 Silent Box units pair the proven Cummins NT855 engine, Stamford alternator, and DeepSea control platform with a purpose-engineered acoustic enclosure. This configuration delivers ultra-low noise with full industrial reliability, enhancing cooling, combustion, control, and protection systems for continuous-duty cycles and complete technical traceability.

Powered by the proven Cummins NT855 engine platform
Multi-layer sound attenuation structure with acoustic-gasket sealed joints
Airflow engineering using low-noise splitter baffles and optimized duct routing
Vibration isolation via anti-vibration engine mounts and resonance-damped frames
Residential-grade exhaust silencer system with flexible bellows isolation

Model	Verified Output / Current	Validation Status
CUMFA NT855-SP400 (Silent Box)	400 kVA — 577 A	Load-Tested & Acoustic Verified

Why is the verified output different from the nameplate rating?

The 400 kVA value represents the platform nameplate rating. The 400 kVA continuous output and sound-pressure levels have been confirmed through on-site load testing under S1 continuous-duty conditions. Canopy dimensions, weight, and fuel-tank capacity are fully verified and recorded on the CUMFA Edition certificate issued per unit.

Continuous S1 Duty

Engineered for sustained industrial operation under continuous-load conditions and long operating cycles.

Verified Performance

Load-tested at 400 kVA and 577 A to provide transparent, real-world operating data.

High-Ambient Readiness

Cooling and combustion systems are engineered to support reliable operation in ambient temperatures of up to 50°C.

Integrated Control & Protection

DeepSea control architecture provides real-time engine and alternator monitoring, multi-layer protection, fault detection, onboard diagnostics, and event logging.

Globally Recognized Components

Built around the Cummins NT855 engine platform, genuine Stamford alternator technology, and DeepSea control systems.

Download Product Catalog

Explore the complete NT855-SP400 technical specification

Access the official NT855-SP400 product catalog for detailed information on verified performance, engine specifications, cooling systems, electrical configuration, mechanical architecture, control systems, and operating conditions.

The catalog includes load-tested performance data and technical documentation for engineering, procurement, and industrial project evaluation.