ABB SPAJ140C integrated protection relay

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Product Description

The ABB SPAJ140C Integrated Protection Relay is a multifunctional microprocessor-based protection device designed for the protection of generators, motors, transformers, and distribution systems. It provides comprehensive protection against overcurrent, earth faults, and phase faults, ensuring safe and reliable operation of power systems.

Technical Specifications

• Model: SPAJ140C

• Manufacturer: ABB

• Type: Integrated Protection Relay

• Rated Current: 1 A or 5 A (optional)

• Rated Voltage: 100 – 240 V AC / DC (depending on configuration)

• Frequency Range: 50 / 60 Hz

• Protection Functions:

  • Three-phase overcurrent protection

  • Earth fault protection

  • IDMT and definite time protection

  • Phase sequence monitoring

  • Start and lockout logic control

• Communication Interface: RS-485 / SPA Bus (Modbus protocol supported)

• Display: Digital LCD with LED status indicators

• Accuracy Class: ±1%

• Operating Temperature: -10°C to +55°C

• Protection Class: IP20

• Weight: Approx. 1.6 kg

• Mounting Type: Panel mounting

Features & Advantages

1. Comprehensive Multi-Protection: Integrates multiple protective functions in one unit.

2. High Reliability: Microprocessor-based digital design ensures accuracy and stability.

3. Configurable Parameters: Fully programmable settings for flexible operation.

4. Advanced Communication: Supports SPA Bus and Modbus for remote control and monitoring.

5. Fast Protection Response: Ensures quick trip action and high system safety.

6. Easy Maintenance: Modular structure for convenient replacement.

7. User-Friendly Interface: LCD and LED indicators for real-time system monitoring.

Application Fields

• Generator and genset protection systems

• Industrial motor control and protection

• Medium and low voltage distribution networks

• Power automation and control systems

• Petrochemical, metallurgical, and manufacturing industries

Precautions

1. Ensure correct voltage and current ratings before installation.

2. Provide reliable grounding to minimize electromagnetic interference.

3. Avoid operating outside the specified temperature and humidity range.

4. Periodically verify protection settings for accurate operation.

5. Do not connect or disconnect communication lines under power.

6. Disconnect power and store in a dry place during long-term downtime.

The structure and details of the product：

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