6 Siemens SGT-A05 KB7S / 501-KB7S 5 MW-Class Mobile Natural Gas Turbine Generators

ARC Power Systems is offering six, low-hour Siemens 501-KB7S mobile natural-gas turbine generator packages. These units are available now and already configured on five-axle mobile trailers for rapid relocation, installation and deployment.

The six-unit fleet provides approximately 32 MW of aggregate generating capacity.

These packages are well suited for data centers, AI and HPC campuses, industrial facilities, microgrids, mining operations, critical infrastructure, distributed generation and bridge power while permanent utility capacity is being developed.

Power Ratings

Each package includes a Siemens 501-KB7S natural-gas turbine, Allen reduction gearbox and Ideal Electric synchronous generator.

• Gas-turbine rating: 5,220 kW at ISO conditions with no package losses
• Generator rating: 5,250 kVA
• Calculated output at 5,250 kVA and 0.90 power factor: 4,725 kW
• Voltage: 2,600 V
• Phase: 3-phase
• Frequency: 60Hz
• Generator speed: 1,800RPM
• Power class: approximately 5MW per package
• Six-unit fleet capacity: approximately 28.5MW

The packages are being marketed as 5 MW-class units because turbine output, generator capacity and net site output represent different rating boundaries. Final delivered output follows the ambient-temperature and elevation performance schedule together with the installed generator, switchgear and auxiliary-load limits.

Siemens 501-KB7S Gas Turbine

• Siemens 501-KB7S natural-gas turbine
• Single-shaft, simple-cycle configuration
• 15-stage axial-flow compressor
• Four-stage turbine section
• Six combustion chambers
• Approximate 13.5:1 pressure ratio
• Operating speed approximately 14,400 to 14,600 rpm
• Dry Low Emissions natural-gas combustion system
• Electronic fuel metering and redundant gas shutoff arrangement
• Compressor water-wash provisions
• Designed for mobile industrial power generation

Generator

• Ideal Electric four-pole synchronous generator
• 5,250 kVA rating at 40°C
• 2,600 V, 3-phase, 60 Hz
• 1,800RPM
• Open-drip-proof construction
• Brushless exciter
• Permanent-magnet alternator
• Digital voltage regulation
• VPI insulation system
• Class F insulation and temperature rise
• Greater than 96.5% stated full-load efficiency
• Subtransient reactance of 0.188 per unit
• Selected for loads with up to 30% total harmonic distortion
• 150% current capability for one minute
• 110% rated-load capability for two hours within a 24-hour period
• High-resistance neutral grounding limited to less than 10 amps

Reduction Gearbox

• Allen Gear model ASG 30 epicyclic reduction gearbox
• 8,716 hp rating
• 8.105:1 ratio
• Approximately 14,500 rpm turbine input
• 1,800 rpm generator output
• 1.3 AGMA service factor
• 99% stated full-load efficiency

Electrical System and Switchgear

Each trailer incorporates the major electrical equipment required to operate the turbine-generator package.

• Siemens NXPLUS C medium-voltage gas-insulated switchgear
• Three onboard feeder breakers in the original island-mode configuration
• Medium-voltage quick-connect output provisions
• Onboard 2.6 kV-to-460 V auxiliary transformer
• 460 V auxiliary distribution
• Derived 240/120 V package services
• Generator metering and protective relays
• Automatic and manual synchronization capability
• Voltage regulation
• VAR and power-factor control
• Vibration and temperature monitoring
• Allen-Bradley PLC-based local control system
• Local operator interface
• 24 VDC control-power battery system

Starting System

The turbine uses a 175 hp/130 kW electric starter motor controlled through a variable-frequency drive.

The original design uses a separate 250 kW/312 kVA, 480 V diesel generator or equivalent external 480 V power source for black-start power. The startup sequence includes an enclosure purge, acceleration to approximately 4,000 rpm, an exhaust purge, ignition, acceleration to operating speed, synchronization and loading.

Mobile Trailer Package

• OnPower-engineered mobile package
• Five-axle Mertz transport trailer
• Air-ride suspension
• Approximately 80,000 lb estimated packaged-unit weight
• Weather-protected, compartmented enclosure
• Dedicated access to turbine, gearbox, generator, switchgear and controls
• Enclosure lighting and service receptacles
• Electric enclosure ventilation
• Filtered turbine inlet-air system
• Packaged exhaust system
• Turbine removal rail and hoist provisions
• Design elevation range from sea level to 6,000 feet
• Package design temperature range from approximately -28°C to 45°C
• Enclosure acoustic design target of 85 dBA or less at one meter

Lubrication, Cooling and Protection

• Common synthetic-lube-oil system serving the turbine, gearbox and generator
• Shaft-driven main oil pump
• Electric pre-lube pump
• Duplex oil filtration
• Air-cooled oil heat exchangers
• Oil reservoir heaters
• Combustible-gas monitoring
• UV/IR flame detection
• Thermal detection
• Alarm horn and strobe
• CO2 fire-suppression system
• Emergency shutdown protection

Operating Hours

Low-hour fleet consisting of:

• Unit A: 966 hours
• Unit B: 2,086 hours
• Unit C: 1,162 hours
• Unit D: 1,869 hours
• Unit E: 478 hours
• Unit F: Test-fire hours only

Site-Condition Performance Reference

Gas-turbine output changes with ambient temperature and elevation.

• At 15°C: 5,149 kWe at sea level; 4,099 kWe at 6,000 feet
• At 25°C: 4,709 kWe at sea level; 3,749 kWe at 6,000 feet
• At 30°C: 4,475 kWe at sea level; 3,562 kWe at 6,000 feet
• At 35°C: 4,230 kWe at sea level; 3,365 kWe at 6,000 feet
• At 40°C: 3,977 kWe at sea level; 3,160 kWe at 6,000 feet
• At 45°C: 3,720 kWe at sea level; 2,954 kWe at 6,000 feet

Cold-condition turbine output can exceed the installed generator rating. Electrical delivery remains limited by the generator, switchgear, protection settings, auxiliary demand and project operating limits.

Fuel and Emissions

The packages are configured for natural gas and include Dry Low Emissions combustion.

The Siemens SGT-A05/501-KB7S family publishes DLE NOx capability at or below 25 ppmvd at 15% oxygen under the stated OEM operating conditions. Packages were designed around EPA 40 CFR Part 60 Subpart KKKK requirements.

Site Integration

This mobile package contains the turbine, gearbox, generator, controls, switchgear, auxiliary transformer, starting equipment, lubrication system, fire protection, inlet system and exhaust system.

We can coordinate logistics

Best-Fit Applications

• Behind-the-meter data-center power
• AI and high-performance-computing campuses
• Industrial primary or prime power
• Microgrids
• Distributed generation
• Mining and remote-site power
• Critical-infrastructure resilience
• Interim or bridge power
• Phased power projects requiring modular capacity
• Multi-unit installations requiring operational redundancy

Availability

All six packages are available now. Units may be discussed individually, as a partial block or as a complete six-unit fleet.

Subject to Prior Sale

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ARC Power Systems

sales@arcpowersystems.com

(213) 371-2848 Call/Text

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