ABB RTXP24 Test Switch Module

The ABB RTXP24, also cataloged as the RTXP24 Test Switch, operates as a dedicated hardware component for secondary signal simulation, circuit isolation, and parameter monitoring within electrical protection and control panels.

Hardware Specifications

Industrial Control and Drives Characteristics

The RTXP24 functions as a multi-pole passive testing block designed to preserve loop connection tracking during secondary injection procedures. The internal contact arrangement allows testing teams to divert current transformer (CT) and voltage transformer (VT) circuits without generating open-circuit overvoltages or localized propagation delays across the protection backplane.

The physical hardware coordinates alongside ABB Relion series controllers (such as the REF615 platform) within IEC 61850 network nodes. This configuration supports rapid I/O density scaling routines across medium and high-voltage switchgear sections by functioning as the front-line physical isolation layer. Because the switch runs a completely manual, non-electronic contact matrix, it provides unconditional firmware flash compatibility across varying generations of panel logic equipment.

Frequently Asked Questions

Q: Is the RTXP24 considered an active PLC discrete or analog input module?

A: No. The RTXP24 is a purely passive, mechanical 24-pole test switch assembly. It does not possess an internal microprocessor, power supplies, or communication stacks, and it operates solely via physical test plug insertion to break or bridge external circuits.

Q: How does the unit protect live current transformer circuits from open-loop faults during plug insertion?

A: The internal pole layout features built-in sequence-shorting contact fingers. When a matching test plug is pushed into the switch assembly, the hardware automatically bridges the current transformer secondary terminals before opening the connection to the protection relay.