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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).
07.03.2025
Sensor ø110mm for Type B Earth Leakage Relays
TDB110
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).
23.01.2025
45° ANNIVERSARY
We are happy to celebrate this important milestone together.
2025 will be a very important year as it marks the 45th year of FRER's activity and a thought of gratitude goes to all those who have characterized our history.
It has been 45 years of choices and changes, 45 years of commitment and satisfaction. However, we see this anniversary as a stage in the journey undertaken as many others are to be achieved, with the same commitment and tenacity that have motivated us since the beginning and that have allowed us to get to this point.
We thank all those who have contributed in these years to the growth of FRER so that it could be an international company, certain that this anniversary can become a new starting point.
