Description
DEIF FAS-2R
Technical Specifications:
- Power Supply: 24 VDC or 110/230 VAC optional
- Measuring Voltage Range: 40 VAC to 690 VAC
- Frequency Range: 45 Hz to 65 Hz
- Response Time: Fast phase and frequency measurement for generator synchronization
- Operating Temperature: -20 °C to +70 °C
- Storage Temperature: -40 °C to +85 °C
- Mounting: DIN rail mounting
- Communication: Modbus RTU optional
- Protection Class: IP20
Function Features:
- Automatic measurement of generator and bus voltage, frequency and phase difference
- Output speed raise/lower pulses to engine governor for frequency matching
- Output voltage raise/lower pulses to AVR for voltage matching
- Close breaker output signal when synchronization conditions meet preset limits
- Adjustable synchronizing window and breaker closing advance time
- Stable real power and reactive power load sharing for parallel gensets
- Built-in overvoltage, undervoltage, overfrequency and underfrequency protection
- LED status indicators for synchronizing, breaker status and fault alarms
- Adjustable ramp rate for load transfer after breaker closure
Application Scenarios:
- Small industrial multi-generator parallel power plants
- Marine generator parallel power systems
- Commercial building standby power systems
- Rental generator set parallel control cabinets
- Hydroelectric small generator synchronization control
Material Composition:
- Housing: Black flame retardant plastic DIN rail enclosure
- Main PCB: FR4 fiberglass printed circuit board
- Core Components: Voltage and frequency sampling transformers, microcontroller
- Terminals: Screw copper terminals for voltage, CT and control wiring
- Passive Components: High precision resistors, capacitors and surge suppression components
Structural Features:
- Compact rectangular plastic housing for DIN rail mounting
- Front panel with multiple LED status indicators and adjustment potentiometers
- Screw terminal blocks on one side for field wiring
- Internal PCB fixed with insulation supports
- Small ventilation slots for heat dissipation
Working Principle: The controller samples voltage signals from generator and busbar voltage transformers continuously. Internal circuit calculates voltage difference, frequency difference and phase angle difference between generator and bus. It sends pulse signals to engine governor and AVR to adjust generator speed and voltage. When all synchronization parameters fall within preset window, the controller sends closing command to generator circuit breaker. After breaker closure, the module adjusts governor reference to distribute active load evenly among paralleled generators. Protection logic triggers alarm when voltage or frequency exceeds threshold.
Installation Requirements:
- Mount controller on standard DIN rail inside generator control cabinet
- Strictly follow voltage transformer polarity during VT wiring
- Separate VT measurement cables from high power wiring
- Use shielded cable for Modbus communication if required
- Connect protective earth terminal reliably
- Keep away from engine ignition coils and large contactors
Usage Notes:
- Set rated voltage, frequency and breaker closing advance time before commissioning
- Test synchronization function with simulation tool before connecting to live bus
- Verify CT and VT ratio matches controller configuration
- Disconnect all voltage inputs before opening enclosure for maintenance
- Check terminal screw tightness periodically under vibration environment
- Adjust synchronizing window to avoid out-of-phase breaker closure
