The challenge
The degradation of an electrical insulation is a major risk, especially when combined with other factors.. In this case of study, a defect in a speed controller, coupled with a critical failure of the ground wire (high impedance), created an absolute emergency situation.. The general circuit breaker, rendered blind by the absence of detectable leakage current, did not trip.. The motors, equipped with a floating neutral point, continued to operate normally, masking a deadly danger: the activation of all the metallic masses of the electrical cabin..

The approach
Despite the continued production, the RED solution, which continuously measures the voltage between each phase and the ground, immediately identified an anomaly.. The sensor detected that the potential difference between the short-circuit phase and the ground had dropped to zero, revealing a blatant imbalance of the reference point with respect to the overall mass..

The result
This immediate detection highlighted an invisible danger on the ground and enabled the operator to react urgently.. The power supply was cut off, the infrastructure was secured, and the faulty variator located, thus avoiding an imminent risk of electric shock for personnel and serious material damage..

👉 Download the full Use Case to understand how continuous electrical monitoring can mitigate the failures of passive protections and save lives.