Seven Star L.L.C

Diesel Generator

Seven Star LLC supplies complete diesel generator sets to customers across Oman and the GCC, spanning Cummins, Perkins, Wartsila, and additional brands including Volvo, Deutz, Doosan Daewoo, MTU, Ricardo, Shangchai, Weichai, Baudouin, and Yuchai engines. Our range includes marine diesel generating sets such as the Wartsila 20, industrial gensets like the Perkins 2506C-E15TAG2, silent and open-type portable units such as the ADE AP15D5, and Cummins auto-mains-failure controllers like the DSE7320 that manage automatic changeover during a grid outage.

Genset configurations available include container, trailer-mounted, mobile, portable, and silent enclosure formats, selected according to site noise restrictions, mobility requirements, and installation environment, from onshore oil and gas facilities to marine vessels and construction sites. Seven Star LLC can also design and construct noise-reduction enclosures to meet a customer’s specific acoustic requirements.

Seven Star LLC’s engineers help customers across Oman select the correct generator capacity, fuel system, and control configuration for their backup or prime power application, supplying genuine equipment with full technical support.

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Wartsila 20 Marine Diesel Generating Set Engine Supplied by Authorized Partner Seven Star LLC

Wartsila 20 Marine Diesel Generating Set Engine

Wartsila

In stock

Perkins 2506C-E15TAG2 Diesel Engine Supplied by Authorized Partner Seven Star LLC

Perkins 2506C-E15TAG2 Diesel Engine

Perkins

In stock

Cummins DSE7320 Generator Controller Supplied by Authorized Partner Seven Star LLC

Cummins DSE7320 Auto Mains Failure Generator Controller

Cummins Inc.

In stock

Cummins 312/315 kVA Diesel Generator Set Supplied by Seven Star LLC

Cummins 312/315 kVA Diesel Generator Set

Cummins Inc.

In stock

ADE AP15D5 15 kVA Three Phase Silent Diesel Generator

ADE AP15D5 15 kVA Silent Diesel Generator

ADE

In stock

Mitropower PM13TA1-3-Diesel Generator

Mitropower PM13TA1-3 Diesel Generator

Mitropower

In stock

Frequently Asked Questions

What is the optimal sizing strategy for industrial diesel generators handling heavy motor loads?
Engineers must account for transient voltage dips during the high inrush currents typical of large induction motor startups. Oversizing the alternator by 20-30% relative to the engine capacity often provides the necessary reactive power capability without risking prolonged wet stacking.
How do automatic transfer switches (ATS) ensure seamless integration with diesel generators?
The ATS continuously monitors the primary utility feed and, upon detecting a sustained voltage anomaly, signals the generator to start. Once the generator reaches synchronous speed and stable voltage, the ATS mechanically breaks the utility connection and closes onto the generator feed.
What fuel management practices are critical for standby diesel generators?
Diesel fuel degrades over time due to microbial growth and oxidation, which can clog injectors and cause start failures. Implementing a comprehensive fuel polishing system and using biocides ensures the stored fuel maintains optimal cetane levels and purity.
How do block heaters improve the starting reliability of diesel engines in cold environments?
Block heaters maintain the engine coolant at an optimal standby temperature, which significantly reduces the cranking time and minimizes wear on internal components. This thermal readiness is essential for meeting the stringent 10-second startup requirement in life-safety applications.
What are the key parameters monitored by modern diesel generator controllers?
Advanced controllers track critical metrics including oil pressure, coolant temperature, alternator output voltage, frequency, and engine RPM. This granular telemetry is integrated into plant-wide control systems for predictive maintenance and automated alarm routing.