Description
The DEIF LSU-113DG is a specialized Load Sharing Unit designed for the parallel operation of generators. It works in conjunction with an electronic speed governor (to control frequency) and an Automatic Voltage Regulator (AVR) to ensure that multiple generator sets share the electrical load proportionally and remain synchronized.
Product Parameters (Datasheet)
- Model Number: LSU-113DG
- Function: Load sharing, frequency control, and voltage control
- Voltage Inputs: 100–110 V AC or 380–440 V AC (System-dependent)
- Frequency Range: 50/60 Hz
- Output Signal: Analog control signal for governor and AVR (e.g., ±10 V DC or 4–20 mA)
- Parallel Operation: Up to 8 generators in a single system
- Mounting: Standard 35mm DIN rail
- Protection Rating: IP20
- Power Supply: 110/220/440 V AC (Self-powered or external auxiliary)
Country of Origin
This generator control module is engineered and manufactured by DEIF A/S in Denmark, a global leader in green and reliable power control solutions.
DEIF LSU-113DG
DEIF LSU-113DG
DEIF LSU-113DG
Application Fields
The LSU-113DG is a staple in power management systems (PMS):
- Marine & Offshore: Managing power distribution on ships and oil rigs where redundant power is critical.
- Emergency Standby Power: Coordinating large-scale generator sets for hospitals and data centers.
- Island Mode Operation: Controlling isolated microgrids that rely on multiple small generators.
- Industrial Plants: Ensuring smooth load transitions between the main grid and onsite generation.
Product Usage Instructions
- Mounting: Install the LSU-113DG in a vibration-free control cabinet on a DIN rail. Ensure proper ventilation around the unit.
- Wiring: Connect the three-phase sensing voltage from the generator busbar. Connect the analog output leads to the speed governor’s “Remote Speed” input.
- Parallel Line Connection: Connect the “Parallel Lines” (communication wires) between all LSU-113DG units in the system. This allows the units to “talk” to each other to balance the load.
- Calibration: Adjust the “Base Load” and “Droop” settings using the front-facing potentiometers to match the response characteristics of your specific engine and governor.
- Testing: Perform a load-step test to ensure that when a large load is applied, all generators ramp up their power output simultaneously and proportionally.
Product Technical Description
The LSU-113DG acts as the “supervisor” for a single generator set within a multi-gen system. Technically, it measures the active power (kW) and reactive power (kVAR) produced by the generator and compares it to the total load on the busbar via the parallel lines. If the generator is carrying less than its fair share of the load, the LSU-113DG sends a signal to the governor to increase the fuel rack position. Conversely, if the generator is over-loaded, it sends a decrease signal. The “DG” designation refers to its compatibility with diesel generator sets, featuring specific damping algorithms to handle the inertia of reciprocating engines.
Q&A (Common Questions)
- Q: Can I use the LSU-113DG with different sizes of generators?
- A: Yes. By adjusting the percentage scaling, the LSU-113DG can ensure that a 500kW generator and a 1000kW generator both carry 50% of their respective capacities.
- Q: What is the purpose of the “Parallel Lines”?
- A: These lines create a common reference bus. Without them, the units cannot know what the other generators are doing, and load sharing would be impossible.
- Q: How does this differ from the LSU-112DG?
- A: The 113 series typically includes additional voltage control or specialized synchronization features that the 112 series lacks.
- Q: Is there a digital version available?
- A: Yes, while the LSU-113DG is a robust analog-based unit, DEIF’s newer AGC (Advanced Genset Controller) series provides fully digital integrated control.
Similar Model Recommendations
- DEIF LSU-112DG: Basic load sharing unit.
- DEIF GPU-3: Generator Protection Unit.
- DEIF GPC-3: Generator Paralleling Controller (Digital).
- DEIF FAS-113DG: Synchronizing unit often used alongside the LSU.
- Woodward 2301A: Common alternative for load sharing and speed control.
For technical manuals or to request a quote for the DEIF LSU-113DG, please contact our power management technical team.
