DEIF LSU-113DG Load Sharing Unit for Generator Paralleling & kW Control

The DEIF LSU-113DG is a dedicated load sharing unit designed for paralleling generator sets and keeping real power (kW) distribution stable and predictable. From my experience, this module is a solid fit when you’re upgrading legacy panels or building a straightforward power management scheme where accurate kW sharing and reliable governor control matter more than fancy networking features. You might notice that it pairs nicely with an external synchronizer and electronic governors to deliver steady frequency and smooth load transfer across multiple gensets.

Company’s Order Placement Process and Guarantees

• Warranty: 365 days
• Delivery: 1 week if in stock; no more than one month at the latest
• Payment: 50% advance payment; full payment before delivery
• Express options: FedEx, UPS, DHL

Key Features

• Accurate kW load sharing – Keeps active power balanced between paralleled gensets, reducing hunting and uneven loading.
• Governor-friendly outputs – Typically supports raise/lower control and bias signals for common electronic governors used on diesel sets.
• Voltage and CT sensing – Uses generator voltage for frequency/phase reference and a 1 A/5 A CT input for real power measurement.
• Isochronous and droop applications – Works in many cases with isochronous sharing or droop-based setups, depending on the governor configuration.
• Robust for harsh environments – Industrial build suited for engine rooms and switchboards with proper ventilation and wiring practices.
• Standalone simplicity – Analog control approach; typically no network dependency, which makes troubleshooting quicker on-site.

Technical Specifications

Related or Supporting Products

• DEIF LSU-112 – Earlier load sharing variant; similar purpose with slightly different I/O behavior.
• DEIF AGC-4 Mk II – Advanced genset controller integrating synchronizing, load sharing, and protections (often replaces separate LSU + synchronizer setups).
• DEIF PPM-300 – Power management platform for multi-generator plants; adds advanced load-dependent start/stop and bus-tie logic.
• External synchronizer (e.g., DEIF synchronizer modules) – Required for automatic phase matching prior to breaker close.
• Electronic governor (e.g., Woodward 2301D or equivalent) – LSU-113DG interfaces to the governor for speed/kw control.

One thing I appreciate is how the LSU-113DG slots into existing switchboards with minimal rewiring. A utility client shared that after swapping an aging sharing unit for this model, they saw steadier frequency and much less operator intervention during peak shifts.

Installation & Maintenance

• Cabinet & environment – Mount in a dry, vibration-controlled panel with natural or forced ventilation. Keep away from hot exhaust ducts.
• Wiring practices – Use shielded cables for sensing and governor lines where possible; route CT and sensing separately from high-noise conductors. Verify CT polarity and ratio before energizing.
• Synchronization – Pair with a dedicated synchronizer for safe breaker closure on a live bus. Dead-bus closing behavior depends on site logic and breaker interlocks.
• Grounding – Bond instrument grounds at a single point to avoid ground loops, especially in mixed analog/digital panels.
• Commissioning – Calibrate kW measurement using known load steps; trim sharing gain so sets track within a few percentage points under transient conditions.
• Routine checks – Inspect terminals, tighten connections quarterly, clean dust, and verify sharing accuracy after governor maintenance. Firmware is typically not required for analog LSU units, which simplifies upkeep.
• Spares – Keep a spare unit or at least terminal documentation and governor settings on file; it shortens recovery time if a module swap is needed.

Quality & Certifications

• CE marked; RoHS compliant (typical for DEIF industrial control modules)
• Manufacturing under ISO 9001 quality systems
• Manufacturer warranty is commonly 12 months; our supply includes a 365-day warranty as stated above