Overview

The ABB SPAJ 110 C-AA Earth-fault Relay is an advanced secondary protection relay engineered for reliable earth-fault detection in power systems. This integrated protective relay connects to current transformers (CTs) to measure earth-fault currents using both residual current (three-phase CTs) and core-balance CT methods. By triggering alarms, tripping circuit breakers, or initiating auto-reclose functions, the SPAJ 110 C-AA ensures optimal protection for your electrical systems.

Functional Highlights

This Earth-fault relay features adjustable low-set (Io>) and high-set (Io>>) stages, allowing for precise tailoring to specific operational requirements. Users can choose between definite-time (DT) or inverse-time (IDMT) operation, with the IDMT mode offering four standardized curves—Normal, Very, Extremely, and Long-time Inverse—complying with IEC 255 and BS 142 standards.

Moreover, the SPAJ 110 C-AA includes a start signal contact function for coordination with other relays, enhancing the overall efficiency of the system. An optical logic input enables external blocking signals, further increasing integration capabilities with existing protection systems.

To maximize reliability, this integrated protective relay features an auto-diagnostic system that continuously monitors all hardware, software, and auxiliary power. Upon detecting a fault, the relay activates an output relay, illuminates an IRF indicator, and displays a fault code via serial communication. This self-supervision capability significantly reduces downtime and enhances system availability.

Technical Data

• Model Number: SPAJ 110 C-AA
• Module Type: Integrated Protective Relay
• Manufacturer: ABB
• Condition: Brand New
• Weight: 3.2 kg
• Dimensions: 24 x 13.2 x 16 cm
• HS CODE: 8537101190
• Product Origin: Sweden
• Lead Time: In Stock
• Minimum Order Quantity (MOQ): 1
• Measurement Methods: Residual current and core-balance CT
• Operation Modes: Low-set (Io>) and high-set (Io>>) stages
• Compliance: IEC 255, BS 142
• Communication Service: Ethernet router

Typical Applications

The ABB SPAJ 110 C-AA Earth-fault Relay is ideal for:

• Substations and industrial networks requiring enhanced earth-fault protection.
• Integration into electrical protection systems where precise settings and diagnostics are crucial.
• Modern power systems focusing on reliability and compliance with international safety standards.

FAQ

1. What is the weight of the SPAJ 110 C-AA Earth-fault Relay?
   The SPAJ 110 C-AA weighs 3.2 kg.

2. What are the dimensions of the SPAJ 110 C-AA?
   Its dimensions are 24 x 13.2 x 16 cm.

3. What communication services does the SPAJ 110 C-AA support?
   It includes an Ethernet router for communication services.

4. What operation modes does the relay offer?
   The relay features low-set and high-set stages with definite-time or inverse-time operation.

5. Is the SPAJ 110 C-AA compliant with international standards?
   Yes, it complies with IEC 255 and BS 142.