Overview

The ABB RTXP24 is a modular test switch extensively used in protection and control panels for secondary signal simulation, isolation, and monitoring. It plays a crucial role during system testing or maintenance, allowing engineers to test signals like current and voltage without directly processing field signals or logic. Unlike standard PLC input modules, the RTXP24 acts purely as a passive interface between field wiring and protection relays.

Additionally, the RTXP24 is compatible with ABB’s Relion® series (e.g., REF615) and other IEC 61850-based systems. Its compact design features color-coded terminals and mechanical interlocks, ensuring safe operation and easy identification during high-stakes testing procedures.

Thanks to its modularity, the RTXP24 supports flexible configurations, making it ideal for both new and retrofit installations in substations, power plants, and industrial control rooms.

Technical Data

Typical Applications

• Protection Relay Testing: Safely inject test signals into relays without disconnecting live circuits.

• Substation Commissioning: Verifies wiring and relay logic during system startup.

• Routine Maintenance: Allows periodic testing of current and voltage inputs in control systems.

• Signal Isolation: Temporarily disconnects field signals for troubleshooting or upgrades.

• Training and Simulation: Supports hands-on relay testing in educational and R&D environments.

Example: During a substation upgrade, engineers can use the RTXP24 to simulate fault conditions and verify relay responses without affecting live operations. This minimizes downtime and enhances safety.

FAQ

Q: Is RTXP24 a PLC input module?
A: No, it is a 24-pole test switch used for relay testing and signal simulation.

Q: What systems is it compatible with?
A: It is compatible with ABB Relion® relays, including REF615, and other IEC 61850-based systems.

Q: Can it be used in live systems?
A: Yes, it allows testing without interrupting live circuits, thanks to its mechanical interlocks.

Q: How is it mounted?
A: It is typically panel-mounted in protection and control cabinets.