WOODWARD EGCP-3 8406-113

Technical Specifications (Core Parameters Bold)

Power & Environmental Ratings

• DC Operating Power Supply: 18 VDC ~ 32 VDC nominal genset battery input
• Operating Ambient Temperature Range: -20 °C ~ +70 °C
• Storage Temperature Range: -30 °C ~ +80 °C
• Operating Humidity Tolerance: 5% ~ 95% RH non-condensing environment only
• Net Unit Weight: 4.3 kg (9.5 lbs)
• Front Panel Physical Dimensions: Standard industrial 19-inch panel cutout compatible form factor

Signal Input & Output Interfaces

• Analog Setpoint Inputs: 4 ~ 20 mA DC, 0 ~ 5 VDC, ±3 VDC voltage bias control signals
• Generator Sensing Inputs: Three-phase PT voltage transformers, CT current transformers direct connection
• Communication Bus: Isolated LonTalk peer-to-peer load sharing communication bus
• Configuration Port: ServLink PC software dedicated communication interface
• Relay Output Channels: Multiple fault shutdown, breaker control, alarm indication isolated relay contacts
• Analog Control Outputs: PWM, 4~20mA speed/voltage bias outputs for Woodward governors and AVR excitation regulators

Measurement & Control Performance

• Voltage/Frequency Sampling: High-speed digital phase angle and slip frequency real-time sampling
• Load Sharing Accuracy: Proportional kW/kVAR distribution error less than ±1% across all parallel genset units
• Synchronization Check-Sync Interlock: Prevents circuit breaker closure under out-of-phase voltage/frequency mismatch conditions
• LCD Display: Dual backlit multi-line LCD screen supporting 8-line status readout, 4-line parameter configuration view, permanent timestamped fault alarm log storage

Functional Features

1. Precise proportional active (kW) and reactive (kVAR) load sharing between up to 16 parallel generator units via LonTalk bus
2. Automatic synchronization logic with phase angle, voltage difference and slip frequency safety interlock check-sync function
3. Dual operating control modes: Isochronous zero-droop constant speed single-unit operation, droop differential parallel grid operation
4. Complete generator electrical fault protection: Overvoltage, undervoltage, overfrequency, underfrequency, reverse power, overcurrent shutdown interlock
5. Multi-line backlit local LCD interface for on-site parameter adjustment and real-time power data monitoring
6. ServLink PC software full remote configuration, firmware upgrade, historical fault log extraction and system performance trending
7. Selectable single-phase zig-zag generator PT voltage sensing configuration for specialized single-phase power generation systems
8. Continuous PF (power factor) balancing across all parallel gensets during variable load demand fluctuation

Working Principle

Material Composition & Structural Characteristics

• Outer housing: Heavy-duty cold-rolled galvanized steel sheet metal enclosure with beige anti-corrosion powder coating
• Front panel: Tempered scratch-resistant transparent LCD protective window, membrane tactile adjustment pushbuttons
• Internal PCB: Multi-layer high-voltage isolated industrial control circuit board with surge suppression varistors on all CT/PT sensing input circuits
• Wiring Terminal Blocks: High-current screw-clamp terminal blocks rated for generator CT/PT heavy gauge wiring connection
• Internal heat dissipation: Passive finned aluminum heat sink mounted to power regulation circuit components
• Sealing Components: Closed-cell foam rubber environmental gaskets between front panel and main metal housing assembly

Advantage Highlights

1. Supports up to 16 parallel genset units with <±1% load sharing proportionality precision for balanced power plant operation
2. Dedicated single-phase zig-zag generator voltage sensing configuration for specialized low-power single-phase distributed generation systems
3. Built-in check-sync interlock eliminates out-of-phase breaker closure catastrophic generator damage risk
4. Local dual LCD display removes requirement for external HMI for on-site commissioning and troubleshooting
5. Isolated LonTalk communication bus immune to industrial electrical noise interference across multi-unit power plant installations
6. Wide -20°C to +70°C operating temperature range compatible with unheated outdoor generator control rooms

Applicable Industries

Installation Requirements

1. Standard 19-inch electrical control cabinet panel cutout mounting with full rear wiring clearance for heavy-gauge CT/PT cabling
2. All CT current sensing wiring must utilize shielded twisted pair cable with strictly maintained S1/S2 polarity orientation
3. Dedicated protective earth (PE) ground wire mandatory connection to chassis ground terminal for surge protection functionality
4. Minimum 40 mm rear clearance required for passive heat sink air circulation cooling
5. LonTalk communication bus wiring must use isolated shielded twisted pair cable separated from high-current generator power wiring trunking

Usage Precautions

1. CT secondary sensing circuit must never be open-circuited during live generator operation; open CT terminals generate lethal high voltage
2. ServLink firmware upgrade operation requires uninterrupted 24/32 VDC DC power supply; power loss mid-upgrade permanently corrupts control firmware
3. Unit LS load sharing variant excludes integrated ATS automatic transfer switch functionality; separate master control module required for mains grid transfer operation
4. Condensation inside control cabinet will damage high-voltage sampling circuit components; anti-condensation heating strip required for cold climate installation
5. Do not connect single-phase mains voltage directly to three-phase PT voltage sensing input terminals without correct transformer matching