Toroidal current sensor TDB350

DCACleakage

Product overview
TDB series toroidal sensors measure AC and DC currents with a bandwidth from DC to 10 kHz and a resolution of 1 mA. An integrated degauss function with DC offset zeroing, activated by relay command, eliminates DC measurement errors caused by the Earth's magnetic field, permanent magnets, DC coils, temperature drift, mechanical shocks or vibrations.

Measurement details
The RMS current measurement (AC+DC) error is proportional to the line current and depends on the geometrical layout of conductors inside the sensor aperture and on the distance and layout of nearby conductors outside the aperture. IΔn settings below 100 mA are achievable only by centering the conductors and operating in controlled environmental conditions (temperature, vibration, EMI).

Available documents

• Data sheet
• Available options
• Certifications
• PDF technical drawing

Technical specifications

• Model: TDB350
• Type: Toroidal current sensor for Type B earth-leakage relays
• Sensor hole diameter: 350 mm
• Measurable currents: AC and DC
• Bandwidth: DC to 10 kHz
• Resolution: 1 mA
• Integrated degauss function with DC offset zeroing (activated by relay command)
• RMS measurement covers AC + DC components
• Measurement error proportional to line current and dependent on conductor geometry and nearby conductors
• IΔn settings below 100 mA require conductor centering and controlled environmental conditions (temperature, vibration, EMI)