As rail networks across the UK and globally continue to modernise, the transition from legacy infrastructure to digitally integrated signalling and telecommunications systems is accelerating. While this shift enables greater efficiency and connectivity, it also introduces new challenges around system visibility, asset protection and long-term reliability.

To address these challenges, a “detect and protect” approach is becoming increasingly important. Combining intelligent monitoring with robust protection to ensure infrastructure resilience.

Rowe Hankins has developed its Detect & Protect solution to meet this need, integrating two complementary technologies: Non-Intrusive Current Monitors (NICs) and Surge Arrestor Modules (SAMs).

Understanding the condition of critical systems is fundamental to safe and reliable railway operations. However, many traditional monitoring approaches can be invasive, complex to install, or limited in the insight they provide.

Rowe Hankins’ NIC technology addresses this by enabling continuous, non-intrusive current monitoring. By measuring variations in magnetic flux around a conductor, without direct electrical contact, NIC devices can detect subtle changes in current that may indicate developing faults.

This approach supports a shift from reactive “find and fix” maintenance to a more proactive “predict and prevent” strategy. By identifying abnormal conditions early, operators can intervene before faults escalate into failures, reducing disruption and improving overall system reliability.

NIC systems can also be integrated with control and protection architectures, enabling automated responses such as triggering alarms or initiating shutdown procedures where system integrity is at risk.

While detection is essential, protection is equally critical, particularly as modern rail systems become increasingly dependent on sensitive electronic equipment.

Rowe Hankins’ SAM range, developed by OE Electrics, who supply the SAM units, protects against transient overvoltages caused by lightning strikes, switching events and other electrical disturbances. Designed as surge protective devices (SPDs), SAM units are engineered to protect signalling, telecoms and power distribution across a wide range of voltages and applications.

The latest SAM2 range incorporates advanced protection technologies alongside features such as thermal sensing, condition indication and remote alarm outputs, enabling ongoing monitoring of device status.

This ensures that protection is not only active but also visible. Supporting maintenance teams in identifying when components require replacement and maintaining system integrity over time.

Individually, NICs and SAMs provide valuable functionality. However, their combined use creates a more comprehensive approach to infrastructure management.

NICs enable early detection of electrical anomalies, providing insight into system behaviour and emerging risks. SAMs, in parallel, protect equipment from sudden electrical stress, preventing damage and unplanned failures.

Together, they form a layered “detect and protect” strategy, supporting both preventative maintenance and asset protection. This integrated approach is particularly valuable in mixed environments where legacy systems must operate alongside modern digital infrastructure.

As rail operations continue to prioritise reliability, safety and cost efficiency, solutions that combine monitoring and protection are becoming increasingly more important.

By integrating NIC and SAM technologies, the Rowe Hankins Detect and Protect solution helps operators:

Ultimately, this supports safer, more resilient railway operations, aligned with the evolving demands of modern rail networks.

This article was originally published by Rowe Hankins.