LDMUI-01: Product OverviewThe LDMUI-01 is a Load Demand Management Unit Interface module designed for ABB’s generator control systems, specifically for applications requiring multiple generator sets to operate in parallel. This module functions as the central control unit that manages the active and reactive power distribution between synchronized generators, ensuring stable operation of the entire power system. Installed in generator control panels, its primary role is to maintain proportional load sharing between generators while preventing circulating currents and ensuring system stability under different operating conditions.The module operates by continuously monitoring the active power (kW) and reactive power (kVAR) output of each generator and adjusting the fuel injection (for active power) and excitation (for reactive power) to maintain balanced loading across all units. It supports both isochronous operation (constant frequency regardless of load) and droop operation (frequency decreases with increasing load) modes, making it suitable for both islanded operation and grid-parallel applications. The module also provides synchronization capability, allowing generators to be smoothly connected to a common bus.
ABB LDMUI-01
LDMUI-01: Technical Specifications
•• Model Number: LDMUI-01
•• Manufacturer: ABB
•• Product Type: Load Demand Management Unit Interface
•• Inputs: Generator power measurements (kW/kVAR), frequency, voltage
•• Outputs: Speed control (active power), excitation control (reactive power)
•• Load Sharing: Isochronous and droop operation modes
Core Features & Customer ValueThe module’s advanced load sharing algorithms ensure precise power distribution between generators, preventing overloading of any single unit and maximizing the overall system reliability. For power system engineers, this translates to optimized fuel efficiency, reduced maintenance costs, and extended generator life. The isochronous load sharing capability maintains constant frequency regardless of load changes, which is critical for sensitive electronic equipment and industrial processes.The synchronization feature allows for smooth connection of additional generators to the bus without power disruptions. This enables scalable power systems where generators can be brought online as load increases, optimizing fuel consumption across the entire operating range. The module’s flexible configuration supports various operational scenarios including base load operation, peak shaving, and standby power applications.Typical ApplicationsIn marine vessels, the LDMUI-01 manages multiple diesel generators operating in parallel to supply power for propulsion and hotel loads. The precise load sharing ensures stable operation during dynamic load changes such as thruster operation or large motor starting.In industrial facilities with captive power generation, the module balances load between multiple generators during islanded operation or when operating in parallel with the utility grid for peak shaving applications.
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Full 12-month warranty on all components
Full 12-month warranty on all components
