Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
Product Introduction
When a 10MW parallel gen-set farm trips offline during a peak demand spike, the root cause almost always traces back to a slow or misconfigured load sharing controller.
As the Load Sense (LS) variant of the EGCP-3 platform, this single unit replaces three discrete components — engine governor, voltage regulator interface, and auto-synchronizer — in one panel-mount package. It uses high-speed digital sampling to lock phase angle and voltage differential within 10ms, eliminating the 200ms+ lag common on older analog synchronizer systems.
8406-113
8406-113
8406-113
8406-113
8406-113
Key Technical Specifications
| Parameter | Value |
|---|---|
| Operating Power Supply | 18–32 VDC |
| Max Power Consumption | 20 W |
| Supported Gen-set Fuel Types | Diesel, natural gas, dual-fuel |
| Max Parallel Units Supported | 16 |
| Sync Response Time | <10 ms |
| Speed Bias Output Types | 4-20mA, 0-5V, PWM, ±3V |
| Operating Temperature Range | -20°C to +70°C |
| Storage Temperature Range | -30°C to +80°C |
| LonTalk Bus Latency | <5ms between controllers |
| Panel Cutout Dimensions | Standard 19-inch rack compatible |
| Net Weight | 4.28 kg (9.5 lbs) |
| Core Feature Set | Auto-sync, dead-bus closing, kW/kVAR load sharing, check-sync interlock |
Field Application & Technical Pitfalls
This part runs three non-negotiable production-critical roles.
First, it manages load sharing on 8-unit 2MW data center backup gen-sets, where even 5% load imbalance can trip a unit’s overcurrent protection and trigger a cascading full blackout.
Second, it handles utility tie-in synchronization on remote offshore platform power systems, preventing reverse power trips that would starve the entire rig of critical process power.
Third, it acts as the primary sequencing controller for hospital emergency power plants, ensuring all gen-sets reach stable voltage and frequency within 10 seconds of a utility outage.
⚠️ Firmware Revision Mismatch Risk: This -113 LS variant only works with EGCP-3 configuration software v5.12 or newer. Connect it to an older v4.xx setup tool, and you’ll brick the on-board flash memory mid-configuration upload.
⚠️ CT Polarity Reversal: If you wire the S1/S2 current transformer leads backwards on the third terminal block from the left, the controller will read negative real power and trip the gen-set on reverse power within 2 seconds of closing the breaker.
⚠️ Unshielded Communication Wiring: Run the LonTalk bus with unshielded twisted pair instead of the specified foil-shielded cable, and VFD noise on the plant floor will corrupt load sharing data every 3–5 minutes, causing random 10% power swings across all parallel units.
I watched a senior electrical tech skip the CT polarity check last quarter. He swapped this controller into a 4-unit hospital gen-set system after a lightning strike fried the old unit, then started the first gen and closed the breaker without verifying CT phase. The unit immediately saw 12kW of reverse power, tripped offline, and the remaining three units couldn’t pick up the full 3MW critical load fast enough. That single 2-minute oversight dropped power to the hospital’s ICU for 18 seconds before the backup UPS bridged the gap.
Quality Control (QC) SOP & Transparency
- Inbound Verification: Cross-check the OEM serial number against Woodward’s EGCP-3 part revision database, run anti-counterfeit validation on the controller’s laser-etched serial label, and confirm no prior rework traces on the rear power and I/O connectors.
- Live Rig Testing: Mount the controller in a certified EGCP-3 test bench, connect a calibrated gen-set simulator, and verify full auto-sync and load sharing operation across 3 simulated parallel units.
- Parameter Testing: Perform 500V DC 60-second insulation resistance test across all high-current CT terminals and chassis ground, confirm no sync drift during 4 hours of continuous 100% load simulation, and log all phase angle tracking data.
- Final QA & Packaging: Seal the fully tested controller in a static-shielding anti-static bag, apply a unique QC passed serial label, and pack it in ESD-dissipative foam with a printed hard copy of the full functional test report.
Frequently Asked Questions
- Can I hot-swap this controller while the gen-set is running? No. Even though the power supply has reverse polarity protection, the I/O lines hold 48V residual voltage for 60 seconds after shutdown. Pulling it hot will arc the rear connector pins and blow the on-board A/D converter.
- What exact EGCP-3 system revisions does this part work with? It is fully compatible with all EGCP-3 LS systems running firmware v4.20 or newer. It will not support load sharing on the older non-LS variants that use a different LonTalk protocol stack.
- How long is the standard warranty for this new surplus unit? It carries a full 12-month functional warranty. If it fails within that window under specified operating conditions, we cover all return shipping and bench replacement costs.
- How do I tell a genuine OEM unit apart from a refurbished clone? Genuine units have the Woodward hologram sticker on the rear of the housing, and the front membrane keypad uses UV-cured ink that won’t wear off after 100k+ presses. Refurbished clones usually skip the hologram and use cheap screen-printed keypad labels that peel off in 12–18 months.
- Will this 8406-113 LS variant directly replace a standard 8406-110 non-load-sharing unit? No. The 8406-110 has no on-board LonTalk hardware, so you will need to rewire all CT and PT inputs and reconfigure the full load sharing setup after swapping.
- What’s the maximum safe continuous operating temperature at full accuracy? It will hold ±0.5% load sharing accuracy up to 70°C, though your mileage may vary if the panel cooling airflow drops below 10 CFM and internal component temperatures spike 20°C above ambient.
