June 2025

Live Retrofit Supervisor (LRS): Advanced Low Voltage Monitoring Without Interruptions

In a context where the digitalization of low voltage networks is becoming increasingly critical, at Pronutec we have developed an innovative solution that addresses the sector’s evolving needs: the Live Retrofit Supervisor (LRS). This system enables the installation of advanced low voltage monitoring without interrupting the power supply—marking a significant step forward in terms of efficiency, safety, and service continuity.

What is the LRS?

The Live Retrofit Supervisor is a solution designed to enable real-time monitoring of low voltage networks using non-intrusive sensors and easily installable components. Its main advantage lies in its ability to be installed without disrupting the electrical supply, a particularly valuable feature in urban centers, critical facilities, or hard-to-access areas.

Fully compatible with any brand or type of three-pole fuse base or circuit breaker, the LRS can be adapted to both new installations and legacy infrastructure, with no need for prior panel inventory or condition review.

Key Technical Advantages

🔌 Live installation without service interruption
⚡ Universal compatibility with national standards, fuse-switch disconnectors, and manufacturers
💡 Shared electronics with other smart solutions such as our SFS range
📊 Detailed per-line and per-phase measurements, with high-performance monitoring
🧠 Flexible design with components adaptable to cable distribution
🔧 Quick setup with no loose floor cabling thanks to concentrated wiring per line

LRS System Models

The LRS is based on open-core current transformers that are permanently installed in the panel. This version is intended for long-term monitoring solutions, ensuring greater robustness and durability over time

Voltage Measurement Options in the LRS

The version of LRS with open-core transformers includes three voltage measurement options, allowing adaptation to technical specifications or regulatory constraints of each utility:

Option A – Voltage Taps (Vampire Clips)
The cable insulation is pierced to contact the conductor. This universal solution is compatible with any fuse base or circuit breaker.

Opción B – Tensión con argollas
Evita perforar el cable y es ideal para salidas con terminal de tornillo. Destaca por su compacidad, lo que facilita su instalación en cuadros pequeños o de intemperie.

Option C – V-Type Terminal Connectors
Designed for panels using V-type terminals. It offers additional space savings without compromising the installation.

A Future-Proof Solution for Low Voltage Networks

Pronutec’s LRS is the result of our commitment to grid digitalization, preventive maintenance optimization, and energy efficiency. Its versatility, ease of installation, and adaptability to existing infrastructure make it a key tool for distribution utilities, engineering firms, and grid operators aiming to improve the operational intelligence of their networks.