Earth-fault sensor TDB471

TDB series rectangular sensors are able to measure AC and DC currents with a DC-10kHz bandwidth. 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 terrestrial 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 intensity and it depends on the geometrical layout of the bus bar conductors passing through the sensor hole. It also depends on the distance and the geometrical layout of the nearby conductors passing outside the sensor hole. The IΔn setting <3A will be possible only by centering the bus bar conductors and with controlled environment conditions (temperature, vibration, EMI). - Rectangular sensor for Type B Earth Leakage Relays - Measures both AC and DC currents - Bandwidth: DC to 10kHz - Integrated degauss function with DC offset zeroing - Reduces errors from magnetic fields, permanent magnets, DC coils, temperature drifts, mechanical shocks, and vibrations - Accuracy depends on bus bar positioning and environmental conditions - Recommended for applications requiring precise earth leakage detection Technical specifications / Features: - Sensor dimensions: 470x160mm - Type: Rectangular - Application: Type B Earth Leakage Relays - Integrated degauss and DC offset zeroing - Bandwidth: DC-10kHz