CONDITION : NEW-OPEN BOX

Key Features & Specifications

1. Model & Type

   • Model: SPAJ 160 C-AA

   • Type: Microprocessor-based capacitor bank protection relay (part of ABB’s SPACOM series).

2. Primary Protection Functions

   • Overcurrent Protection (50/51):

     • Phase overcurrent (for overloads/short circuits).

     • Neutral overcurrent (for ground faults).

   • Unbalance Protection (60):

     • Detects capacitor bank unbalance (due to failed capacitor units or fuse blows).

     • Operates via current differential (CT-based) or voltage unbalance methods.

   • Overvoltage/Undervoltage (59/27): Optional depending on configuration.

3. Current/Voltage Inputs

   • Rated Current: 1A or 5A (configurable via CT inputs).

   • Voltage Input: 100–240V AC/DC (for auxiliary supply).

4. Settings & Adjustability

   • Overcurrent Thresholds: Adjustable pickup/delay (0.1–30 sec).

   • Unbalance Sensitivity: Configurable alarm/trip levels (e.g., 5–30% unbalance).

   • LED Indicators: For status (alarm, trip, healthy).

5. Communication & Integration

   • Protocols: RS-485 (Modbus RTU), optional IEC 60870-5-103 or DNP3.0.

   • Software: Configured via ABB PCM600 or Relay Manager.

6. Mechanical & Environmental

   • Enclosure: DIN-rail or panel-mounted.

   • Operating Temp: -25°C to +55°C.

   • Certifications: IEC 60255, IEEE C37.90.

Typical Applications

• HV/MV Capacitor Banks:

  • Shunt capacitor banks (for power factor correction).

  • Filter banks (harmonic mitigation in renewables/industry).

• Substations: Protection against capacitor failures due to:

  • Overloads (excessive current).

  • Unbalance (from fuse failures or dielectric breakdown).