Low-voltage busbar temperature measurement in Latvia employs real-time monitoring using wireless sensors, fiber optic cables, and continuous thermal monitoring systems to enhance safety and operational reliability.

Continuous Thermal Monitoring

Continuous thermal monitoring (CTM) systems, such as Eaton's Exertherm solution, are widely used for LV switchgear. These systems permanently monitor busbar joints and cable terminations, providing 24/7 temperature data to detect early signs of overheating or compromised connections. CTM sensors are “fit-and-forget,” suitable for both new installations and retrofits, and can reduce unplanned downtime, electrical fire risks, and personnel exposure to hazardous conditions . They are vendor-neutral and can integrate with existing LV switchgear infrastructure.

Wireless Temperature Monitoring

Wireless busbar temperature monitoring solutions, like those from Elmeasure and ABB, use strap-on or embedded sensors to measure thermal conditions in real-time. These systems are ideal for retrofit applications or space-constrained panels, providing alerts via SMS, email, or IIoT-enabled control systems. They allow operators to correlate load and heat, identify loose connections, phase imbalances, and overloads early, supporting predictive maintenance .

Fiber Optic Linear Heat Detection

Fiber optic-based systems, such as AP Sensing's Linear Heat Detection (LHD), employ a sensor cable along the busbar or within the switchgear to measure a complete temperature profile in seconds. These systems offer configurable alarm zones, rate-of-rise detection, and precise hotspot localization, and can integrate with SCADA for centralized monitoring. Fiber optic solutions are highly accurate, low-maintenance, and suitable for large or complex LV switchgear assemblies .

Thermal Simulation and Analysis

Advanced thermal analysis using Maxwell 3D, transient thermal, and CFD simulations helps design LV switchgear with optimal heat dissipation. These simulations account for skin effect, contact resistance, proximity effects, and material resistivity, allowing engineers to predict temperature rise under rated and short-circuit currents. Simulation results are validated experimentally and inform structural improvements, ensuring compliance with IEC 61439 standards and safe operation .

Practical Considerations

• Installation: Systems can be factory-fitted, retrofitted, or wireless, depending on space and accessibility.
• Integration: Many solutions support SCADA or IIoT platforms for centralized monitoring and predictive maintenance.
• Safety: Continuous monitoring reduces the risk of electrical fires, arc flashes, and equipment failure.
• Maintenance: Modern systems are low-maintenance, with some offering lifetime guarantees on sensor hardware. In Latvia, these technologies are applied in industrial, commercial, and utility LV switchgear installations to ensure reliable power distribution, early fault detection, and enhanced operational safety.