Low-Harmonic Variable-Frequency Control for Oil Platform Engine Cooling Fans
Shipyard: Dalian Shipbuilding Industry Company / Self-Elevating Platform Owner: CBI-MMEER Accommodations LTD AJ46-2 / ABS 4 x 110 kW / 480 V VFD 16 x 22 kW / 480 V FAN Key Service Feature: By using four variable-frequency drives to control 16 fans, under conditions with low cooling demands, the system operates at lower speeds, achieving noise reduction and energy savings.
Shanghai Shipyard / Integrated Geophysical Survey Vessel, Vessel A
Shanghai Shipyard / Integrated Geophysical Survey Vessel, Vessel A Shipowner: Qingdao Institute of Marine Geology S8009/CCS 3x22kW/400V VFD Key features of the service: Inverter-controlled main engine seawater pump, inverter control, bypass control, reduced starting current, minimal investment cost, automatic backwashing, high efficiency and energy savings, and reduced greenhouse gas emissions.
7,000 m³ Cutter Suction Dredger System Integration
Shipyard: Jinhai Heavy Industry Vessel Number: JH0002 Classification Society: CCS Scope of Supply: Side Thrusters—350 kW × 2 Sealing Water Pumps: 90 kW × 2 + 70 kW × 2 High-Pressure Jetting Pumps: 600 kW × 2 Key Service Features: The electrical package includes the side thruster unit, high-pressure jetting pumps, and other equipment. Our company provides centralized electrical control for these devices and implements a long-distance connection—via a 3-meter shaft—between the motors and the high-pressure jetting pumps. The mud pump motor and main motor are started using frequency converters, and by adjusting the output frequency, the motor speed is precisely controlled, enabling stepless speed variation of the mud pump and thus achieving energy savings.
Taizhou Port Shipyard / Ro-Pax Ferry
Hull Type: Ro-Ro vessel with 50 vehicle spaces and 999 passenger seats VFD Control System for 500 kW, 12-pulse Lateral Thruster Vessel Numbers: TK0422/0423 Classification Society: CCS Key Service Feature: By employing a 12-pulse VFD and phase-shifting transformer, harmonic currents are reduced, with harmonic current levels kept below 5%, thereby minimizing the impact on other electrical equipment onboard.
COSL 6500HP PSV / Oilfield Support Vessel
COSL 6500HP PSV / Oilfield Support Vessel 630kW Bow Thruster, 315 kW VACON VFD – Bypass Start 400kW Bow Thruster, 250 kW VACON VFD – Bypass Start 400kW Stern Thruster, 250 kW VACON VFD – Bypass Start CCS -DP2 6 vessels (18 sets) COSL 8000HP PSV / Icebreaking Vessel 500kW Bow Thruster, 250 kW VACON VFD – Bypass Start 500kW Bow Thruster, 250 kW VACON VFD – Bypass Start CCS -DP2 4 vessels (8 sets) Key Service Feature: Use a variable frequency drive to softly start the motor; once the motor has fully started, switch over to the main circuit to supply power to the motor. This ensures that the motor’s starting current remains below 1.1 times its rated current.
475kW Side Thruster Variable Frequency Control System
Shipyard: Keppel Nantong Shipbuilding Co., Ltd. Ship Name: DMITRY MENDELEEV Vessel Type: 5,800 m³ LNG CBM Project: 475 kW Side Thruster Variable Frequency Control System Hull Number: H414 Classification Society: RS Advantages: Low-Harmonic Active Filter
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