Overview

The ABB SPAJ144C-AA Combined Overcurrent and Earth-Fault Relay is a high-performance protection device designed for comprehensive monitoring and protection of power distribution systems. This sophisticated three-phase relay combines overcurrent and earth-fault detection features in a compact unit, making it ideal for a variety of applications in industrial plants, utility networks, and commercial power systems.

Functional Highlights

The SPAJ144C-AA offers dual-stage phase protection, which includes low-set (definite time or IDMT) and high-set (instantaneous or definite time) units for precise fault detection. In addition to these, the relay’s earth-fault protection stages enhance its capability to respond effectively to electrical faults. The relay also incorporates built-in circuit-breaker failure protection and features two heavy-duty plus four configurable signal output relays, all of which can be routed through an output relay matrix for optimal flexibility.

Moreover, this relay is designed for radial feeder protection, proving effective in various earthing systems, including solidly earthed and resistance or impedance earthed systems. Its advanced monitoring capabilities display measured values, fault records, and setting parameters through an intuitive local display, as well as remotely via a serial interface.

The SPAJ144C-AA is equipped with robust self-supervision systems that continuously monitor microprocessor operation and electronics health. With powerful configuration software, this relay enables in-depth parameterization, data recording, and event logging. Its compatibility with fiber-optic buses enhances its integration into modern automated substations.

Technical Data

• Model Number: SPAJ144C-AA
• Module Type: Combined Overcurrent and Earth-Fault Relay
• Manufacturer: ABB
• Condition: Brand New
• Weight: 3.36 kg
• Dimensions: 14 x 25 x 16 cm
• HS CODE: 8537101190
• Product Origin: Sweden
• Lead Time: In Stock
• Minimum Order Quantity (MOQ): 1
• Operating Voltage: 48-250 V AC/DC
• Relay Outputs: 2 heavy-duty and 4 configurable signal outputs
• Response Times: Configurable for rapid fault isolation
• Environmental Compliance: CE certified for EMC

Typical Applications

The ABB SPAJ144C-AA is suitable for:

• Industrial plants requiring reliable protection of feeders and motors.
• Utility networks seeking advanced monitoring and control capabilities.
• Commercial power systems needing high-performance and adaptable protection solutions.

FAQ

1. What is the weight of the SPAJ144C-AA Relay?
   The SPAJ144C-AA weighs 3.36 kg.

2. What are the dimensions of the SPAJ144C-AA?
   Its dimensions are 14 x 25 x 16 cm.

3. What voltage range can the SPAJ144C-AA operate within?
   The relay operates within a voltage range of 48-250 V AC/DC.

4. How many output relays does the SPAJ144C-AA have?
   It features two heavy-duty and four signal output relays.

5. Is the SPAJ144C-AA suitable for modern automated substations?
   Yes, its compatibility with fiber-optic buses makes it ideal for automated substations.