Model Interpretation

8406: Series code for EGCP-3 genset integrated control platform;

113: LS load-sharing specification, 18–32VDC wide DC power, dual-screen local display, full standard onboard I/O, native inter-unit load sharing bus, Class I Div.2 hazardous area approval.

Technical Specifications

Electrical Parameters

Power Supply: DC18–32V (rated 24VDC, max power consumption 20W)

Operating Temp: -20℃ ~ +70℃; Storage Temp: -30℃ ~ +80℃, 5%~95%RH non-condensing

Dimension:359(W)×282(H)×135(D)mm, net weight≈4.3kg, cabinet panel embedded installation

Certification: CE, UL/cUL, Class I Div.2 Group A/B/C/D explosion-proof certification for hazardous site deployment

Onboard I/O Allocation

Analog Input: Generator PT voltage, CT current True RMS sampling, engine temp/pressure 4–20mA analog acquisition

Analog Output: Multi-mode bias output (4–20mA/0–5V/PWM/±3V) for external speed governor load trim

Digital DI: Multi-channel dry contact input for emergency stop, auxiliary contact, fault interlock signal

Relay DO: SPDT relay outputs for breaker closing/tripping, fault alarm, engine shutdown control

Interface and Communication Configuration

Front Panel: Dual independent backlit LCD screens, 8-line running status display + 4-line parameter/alarm log display, membrane keypad for local parameter setup and real-time data checking; 9 sets built-in monitoring menus covering engine, generator, sync, load and ATS status.

Rear Terminal: Screw fixed terminal block for PT/CT, sensor, DI/DO and analog wiring; dedicated ServLink serial communication port for PC software debugging and parameter upload/download.

Communication: Internal load-sharing bus for interconnection among multiple EGCP-3 controllers; optional Modbus RTU for upper DCS/SCADA remote monitoring.

Core Function

Full-automatic genset control: Auto start-stop logic, frequency closed-loop adjustment, smooth mains paralleling & breakaway, multi-set kW/kVar average load sharing with ±1% load precision.

Comprehensive protection logic: Over/under voltage, over/under frequency, reverse power, overcurrent, engine overspeed, high coolant temp/low lube pressure programmable trip protection.

Complete historical data storage: Running log, fault alarm event recording, all alarm codes viewable on front LCD for rapid troubleshooting.

Two configuration modes: On-site panel quick setup and offline PC ServLink software batch parameter configuration; critical startup parameters locked during unit running to avoid misoperation.

Applicable Scenarios

Petrochemical hazardous area captive power multi-unit genset, gas-fired cogeneration power station, offshore platform backup generator cabinet, industrial factory peak shaving parallel power system, biogas genset synchronization control.

Operation and Maintenance Instructions

Install away from high-power inverter and AC contactor to reduce EMI interference; prevent oil mist, corrosive gas and condensed moisture entering cabinet.

Regularly tighten rear wiring terminals, inspect PT/CT secondary circuit to avoid sampling deviation causing load unbalance and sync failure.

Replacement must use original 8406-113 spare controller; download pre-backup configuration via ServLink software before commissioning startup.

Abnormal load-sharing failure: Check inter-unit load-sharing bus wiring first; call fault history via panel menu to judge internal or peripheral circuit fault.