20.07.2026

Sensor ø350mm for Type B Earth Leakage Relays

TDB series sensors are able to measure AC and DC currents with a DC-10kHz bandwidth, and 1mA resolution.  TDB sensors have an integrated degauss function with DC offset zeroing, which is by relay command. This function sets to zero the Dc current measuring errors (DC offset) caused by terrestral magnetic field, permanent magnets, DC coil, temperature drifts, mechanical shocks or vibrations. The measuring error of the RMS current (AC+DC) is proportional to the line current and it depends on the geometrical layout of the conductors passing through the sensor hole. It also depend on the distance and the geometrical layout of  the nearby conductors passing outside the sensor hole. The IΔn setting <100mA will be possible only by centering the conductors and with controlled environment conditions (temperature, vibration, EMI).

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09.04.2026

ISO 14001:2015 Certification – Environmental Management System

We are proud to announce that we have obtained the ISO 14001:2015 certification, an important milestone that confirms our Environmental Management System complies with internationally recognized standards.

This achievement demonstrates our concrete commitment to responsible and sustainable management of our processes, with a focus on continuous improvement of environmental performance.

Adopting an environmental management system not only helps reduce environmental impact, but also improves operational efficiency, lowers energy costs, and strengthens our responsibility toward the environment.

With this certification, we actively contribute to sustainable development by promoting innovative solutions to protect the environment while creating both environmental and economic value.

FRER SRL, LOOK BEYOND MEAUSURE BETTER !

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