The RNC125 Story

When our utility partner needed a future-forward replacement for neon-filament voltage indicators, they turned to MICATU. The new unit needed to be reliable, work with 4kV Unit-Substation feeders, and ideally could be installed without taking the unit offline. In short, it had to work well with the most demanding grid in the country.

Building on their wealth of experience in optical sensing, the MICATU team delivered something extraordinary. Not only did the RNC125 provide exceptional accuracy in a 2-pound, non-conductive housing, the entire solution could be installed without making contact with the current itself — or even without access to an external ground!

With its modular design and capacity to handle multiple voltage classes, this utility was able to deploy the RNC125 sensors rapidly. Their teams were able to reliably determine voltage without even accessing the compartment, thanks to the sensor’s integration with the m410B Optical Signal Processor.

"Although originally envisioned for one specific use case, we quickly realized how transformative a contact-free, groundless voltage sensor is. And the opportunity this opens up for the integrated grid… well, it’s a game changer."