DEIF

DEIF Uni-Line LSU-113DG Active Load Sharing Unit with Built-in Reverse Power Protection

Warranty： 365 days
Quality: Original module
Condition： New / Used
Warehouse: Spot
Delivery time: Shipped in 3 days after payment
Mailbox：plcvarious@foxmail.com

+086 18205988494

Introduction

1.Core Functions

Balanced Active Load Sharing for Multiple Generators (Core Function) When multiple diesel/gas generators run in parallel, the unit automatically distributes active power proportionally according to each genset’s rated capacity. It prevents single-unit overload or light-load operation and stabilizes busbar voltage & frequency, even for parallel gensets with different power ratings.
Dual-Mode Frequency & Power Regulation

Isolated standalone mode: Constant frequency control to maintain stable 50/60Hz grid frequency.
Multi-unit parallel mode: Synchronized control of both frequency and active power. Two built-in relays output speed adjustment signals to drive the engine governor via electronic potentiometers.

Integrated Reverse Power Protection (Exclusive Feature of LSU-113DG) Detects reverse power flow from grid to generator. When reverse power exceeds the preset threshold (5% or 10% of rated power), the unit sends a circuit breaker trip signal after 5s/10s adjustable delay. It prevents generator motoring damage and destructive circulating current between parallel gensets.
Low Power Unload & Trip Function Activates low-power alarm contact when unit load drops below 5% rated power. Coordinates with unload input to cut off genset output and shut down the unit, eliminating long-term inefficient light-load operation.
Adjustable Power Derating Control Front-panel potentiometer sets derating range from 0~50% rated power. Automatically limits maximum genset output under high temperature or abnormal conditions to protect prime movers.
Fail-Safe Disconnection on Circuit Faults If parallel communication wiring or auxiliary supply fails, the module automatically cuts off its own power/frequency control output to isolate the faulty unit without disrupting other parallel generators.
LED Status Indication for Quick Troubleshooting Dedicated LED indicators for power supply, generator voltage, unload state, reverse power action, load sharing and derating status. Technicians can rapidly locate parallel or protection faults.
Wide Adjustable Parameters for Universal Genset Compatibility Proportional band, minimum ON delay, frequency dead band and power dead band are fully adjustable via front knobs, compatible with all mainstream diesel and gas engine governor systems.

2. Main Industrial Applications

Marine Onboard Power Stations (Primary Application) Parallel control cabinet for multi-set diesel generators on cargo vessels, workboats and offshore drilling platforms. Fully certified by major marine classification societies, resistant to vessel vibration, humidity and salt fog. Reverse power protection guarantees safe continuous power supply during navigation.
Land-Based Industrial Backup Diesel Power Plants Multi-unit standby generator systems for factories, data centers, hospitals and shopping malls. Realizes automatic parallel & balanced load distribution to deliver stable backup power during mains blackouts.
Parallel Control Systems for Gas Generator Sets Biogas, natural gas and coalbed methane power stations. Balances active power output and avoids reverse power motoring between interconnected gensets.
Off-Grid Mining & Oilfield Self-Sustaining Power Stations Multi-generator parallel systems for remote mines and oil & gas sites without grid access. Stable operation under extreme temperature and humidity, automatic trip upon overload or reverse power faults.
Mobile Emergency Generator Trucks Parallel networking of multiple high-power generator vehicles for construction sites and emergency rescue projects, achieving uniform load distribution.
Distributed Microgrid & Energy Storage Matching Hybrid wind-solar-storage-diesel microgrids; diesel gensets act as backup power with coordinated power allocation alongside energy storage systems.
Port Terminal On-Site Generators Multi-unit parallel power supply for container terminals and pump houses, supporting 24/7 continuous operation with fault protection to avoid unplanned blackouts.