ABB RTXF18/RK926-115-AH Protection And Control Module

Overview

The RTXF18/RK926-115-AH is a plug-in protection and control module developed by ABB for use in industrial power distribution and substation automation systems.
It is designed for integration into MODAN and MODAKOND platforms, providing fast protection response, deterministic control logic, and secure station-level communication within a compact rack-mounted format.

The module combines protection algorithms, control functions, monitoring, and communication interfaces into a single hardware unit suitable for both local and remote operation.

Core Functions

The RTXF18/RK926-115-AH performs protection and automation tasks for low- and medium-voltage switchgear and associated power system equipment. It supports decentralized automation architectures and is suitable for both utility and industrial substations.

Key functional capabilities include protection execution, breaker and disconnector control, real-time system monitoring, and SCADA communication via standardized substation protocols.

Communication And Cybersecurity

The module supports IEC 61850-8-1 (Edition 1 and Edition 2) for station-level communication, enabling seamless interoperability with modern digital substations and SCADA systems.

Integrated cybersecurity mechanisms are implemented to ensure deterministic and safe operation even under abnormal network conditions or attempted cyber intrusion. Protection and control logic remains autonomous and operational in case of communication loss.

Human-Machine Interface

A built-in multi-display local HMI allows operators and commissioning engineers to access system status, protection indications, and configuration parameters directly at the panel level.
Local operation supports faster commissioning, troubleshooting, and maintenance without reliance on external engineering tools.

Technical Specifications

Mechanical Characteristics

• Form Factor: Plug-in module for ABB rack-mounted systems

• Dimensions: 6.2 × 6.75 × 7.6 cm

• Weight: 1 kg

• Manufacturing Origin: Switzerland or Sweden (depending on production batch)

Electrical And Functional Parameters

• Product Category: Protection and control automation module

• System Compatibility: MODAN, MODAKOND, ABB substation automation platforms

• Communication Protocols: IEC 61850-8-1 Ed.1 / Ed.2

• Processing: High-speed real-time execution suitable for protection applications

• Installation: Tool-free plug-in replacement for minimized downtime

Control And Automation Capabilities

The RTXF18/RK926-115-AH supports a range of predefined and configurable control functions, including:

• Switchgear operation and interlocking logic

• Generator supervision and control

• Load sharing and coordination

• Frequency-related control functions

• Station-level command execution from SCADA or local HMI

Reliability And Industrial Design

The module is engineered for continuous operation in electrically noisy and thermally demanding environments typically found in substations and industrial plants.
Its plug-in architecture allows rapid replacement without rewiring, reducing maintenance time and operational risk.

Typical Applications

• Industrial and utility substations

• MODAN and MODAKOND low-voltage switchgear assemblies

• Generator and auxiliary power systems

• Distributed substation automation requiring secure IEC 61850 communication

• SCADA-connected power distribution networks

Frequently Asked Questions

Q: Is the RTXF18/RK926-115-AH compatible with IEC 61850 Edition 2 systems?
A: Yes. The module supports both Edition 1 and Edition 2 of IEC 61850-8-1, ensuring compatibility with legacy and modern substation infrastructures.

Q: Can the module operate safely if communication is lost?
A: Yes. Protection and control functions are executed locally, allowing the system to remain operational even during network failures or cybersecurity events.

Q: Is on-site configuration possible without engineering software?
A: Yes. The integrated local HMI enables parameter viewing, diagnostics, and basic configuration directly at the panel.