CONDITION : NEW-OPEN BOX

Key Features & Specifications

1. Model & Type

   • Full Model: SPAF 140 C-AA

   • Type: Digital frequency protection relay (part of ABB’s SPACOM series).

2. Primary Function

   • Monitors and protects against underfrequency (UF) and overfrequency (OF) conditions in power grids.

   • Typical applications:

     • Generator protection (islanding prevention).

     • Load shedding in power plants/substations.

     • Grid stability monitoring.

3. Frequency Range & Accuracy

   • Measuring Range: 40–70 Hz (adjustable thresholds).

   • Accuracy: ±0.01 Hz (high precision).

   • Time Delay: Configurable (0.1–300 sec) for tripping/alarms.

4. Inputs & Outputs

   • Voltage Input: 100–240V AC/DC (wide range).

   • Binary Inputs: 4–8 configurable status inputs.

   • Relay Outputs: 4–6 changeover contacts (for tripping/alarms).

5. Communication & Protocols

   • Serial Communication: RS-485 (Modbus RTU).

   • Optional: IEC 60870-5-103 or DNP3.0 (for SCADA integration).

6. Environmental & Certifications

   • Operating Temp: -25°C to +55°C.

   • Standards: IEC 60255, IEEE C37.90 (EMC immunity).

Typical Applications

• Power Plants: Prevents generator damage during frequency excursions.

• Industrial Facilities: Automatic load shedding during grid instability.

• Renewable Energy: Protects wind/solar farms during grid faults.