Description
1. Product Overview
2. Key Features
Full Automatic Synchronisation: Voltage, frequency, and phase angle matching for generator-to-busbar connectionDEIF.
Breaker Time Compensation: Precisely advances the closing command to account for breaker mechanical delay.
Voltage Regulation Control: Built-in voltage matching to minimise reactive power on closureDEIF.
Wide Compatibility: Works with diesel engines, gas turbines, and other prime moversDEIF.
LED Status Indicators: Power, frequency control active, and sync command LEDs for quick diagnostics.
DIN Rail or Panel Mount: Flexible mounting options (35 mm DIN rail or base plate).
Noise Immunity: Special filters for high-distortion grids to prevent false synchronisation.
Compact & Robust: Industrial-grade enclosure for harsh environments.
3. Technical Specifications
3.1 Electrical Ratings
| Parameter | Specification |
|---|---|
| Model | FAS-113DG |
| Function | Automatic Synchroniser (ANSI 25) |
| Voltage Inputs (Gen/Bus) | 57.7–690 VAC (50/60 Hz) |
| Frequency Range | 40–70 Hz (configurable: 45/50/60/65 Hz) |
| Control Supply | 18–32 VDC (24 VDC nominal) |
| Power Consumption | ≤7 W |
| Sync Accuracy (Phase) | ±3° (dF: 0.05–0.25 Hz); ±5° (dF: 0.25–0.5 Hz) |
| Closing Pulse Duration | 400 ±10 ms |
| Output Load | 2 kΩ/V (relay outputs) |
3.2 Environmental & Mechanical
| Parameter | Specification |
|---|---|
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -30°C to +80°C |
| Humidity | 95% RH (non-condensing) |
| Vibration | 2–13.2 Hz: ±1 mm; 13.2–100 Hz: ±0.7 g |
| Enclosure | IP20 (front), IP00 (rear) |
| Dimensions (W×H×D) | 144 × 144 × 50 mm |
| Weight | Approx. 0.7 kg |
| Mounting | 35 mm DIN rail or panel mount |
4. Application Scope
Land-Based Generator Sets: Standby/prime power for factories, hospitals, and data centres.
Grid Parallel Systems: Synchronisation of single generators to utility busbars.
CHP & Cogeneration: Synchronising gas engine/turbine generators to mains.
Industrial Plants: Continuous power generation with grid connection capability.
Diesel/Gas Power Stations: Small-to-medium power generation units.
5. Installation & Wiring
5.1 Installation Requirements
Mounting: Install vertically on a DIN rail or flat panel; ensure ≥50 mm clearance for ventilation.
Environment: Avoid direct sunlight, moisture, corrosive gases, and excessive vibration.
Orientation: Keep the unit upright; do not mount upside down or sideways.
5.2 Terminal Wiring (Simplified)
| Terminal | Description | Wire Gauge |
|---|---|---|
| 1–2 | 24 VDC Power Supply (+/−) | 1.5 mm² |
| 3–4 | Generator Voltage Input (L1/N) | 1.0–2.5 mm² |
| 5–6 | Busbar Voltage Input (L1/N) | 1.0–2.5 mm² |
| 7–8 | Frequency Control Output (to Governor) | 1.5 mm² |
| 9–10 | Voltage Control Output (to AVR) | 1.5 mm² |
| 11–12 | Sync Closing Command (to Breaker) | 2.5 mm² |
| 13 | Chassis Ground (Earth) | 2.5 mm² |
Use twisted-pair cables for control signals to reduce noise.
Never open CT circuits (if used for voltage sensing).
Tighten terminals to 0.8–1.0 Nm to avoid loose connections.
6. Front Panel & Operation
6.1 Front Panel Layout
POWER LED: On when 24 VDC supply is present.
FREQ LED: Flashes when frequency control (speed matching) is active.
SYNC LED: Lights solid when all sync conditions are met; flashes during synchronisation.
Adjustment Potentiometers:
VOLTAGE: Sets allowable voltage difference (±1–5% Un).
FREQ: Sets allowable slip frequency (0.05–0.5 Hz).
PHASE: Sets allowable phase angle (±3°/±5°).
BREAKER: Adjusts closing time compensation (0–500 ms).
6.2 Synchronisation Process
Power On: Apply 24 VDC; POWER LED lights.
Voltage Matching: The unit compares generator and bus voltages; adjust the VOLTAGE pot to set tolerance.
Frequency Matching: The unit controls the generator governor to match bus frequency; FREQ LED flashes during adjustment.
Phase Synchronisation: When voltage and frequency are within limits, the unit monitors phase angle; SYNC LED flashes as phase aligns.
Breaker Closure: When all conditions are met, SYNC LED lights solid; the unit outputs a closing pulse (adjust BREAKER pot for mechanical delay).
7. Safety Precautions
High Voltage Hazard: Only qualified electricians may install/service this unit; disconnect all power before wiring.
Arc Flash Risk: Isolate the generator and busbar before working on the synchroniser.
ESD Protection: Use an anti-static wristband when handling the unit to avoid PCB damage.
No Unauthorised Modification: Do not open the enclosure; tampering voids the warranty.
Environmental Limits: Do not operate outside -20°C to +70°C; avoid condensation.
8. Maintenance & Storage
8.1 Regular Maintenance (Every 6 Months)
Visual Inspection: Check for loose terminals, damaged wiring, or corrosion.
Cleaning: Wipe the front panel with a dry cloth; do not use liquid cleaners.
Function Test: Verify voltage/frequency/phase settings and sync operation.
Calibration: Adjust potentiometers if sync accuracy drifts (use a precision phase meter).
8.2 Storage Guidelines
Condition: Store in original packaging at 10–30°C, 30–70% RH.
Environment: Keep dry; avoid direct sunlight and extreme temperatures.
Duration: Shelf life ≤2 years; inspect before use if stored longer.
9. Troubleshooting
| Fault Phenomenon | Possible Cause | Solution |
|---|---|---|
| POWER LED Off | No 24 VDC supply / blown fuse | Check power wiring; replace 2 A fuse |
| No Voltage Matching | Loose voltage inputs / incorrect pot setting | Check terminals 3–6; adjust VOLTAGE pot |
| FREQ LED Not Flashing | Governor wiring fault / frequency out of range | Check governor connection; adjust generator speed |
| SYNC LED Not Lighting | Phase angle too large / slip frequency too high | Adjust PHASE/FREQ pots; stabilise generator |
| Breaker Fails to Close | Closing wiring fault / incorrect breaker time | Check terminals 11–12; adjust BREAKER pot |
10. Warranty & Disclaimer
Model: FAS-113DG Automatic Synchroniser.
Warranty Period: 24 months from delivery date under normal installation and use.
Warranty Exclusions: Damage from misuse, overvoltage, lightning, water ingress, or unauthorised modification.
Specifications Subject to Change: Manufacturer reserves the right to update specifications without prior notice.
Liability Limitation: Manufacturer is not liable for indirect or consequential damages.
Documentation Version: 1.0 (2026); latest manual available at www.deif.com.
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