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TD.100 Dielectric Dissipation Factor / Tan Delta Tester

The TD.100 Digital Automatic Dielectric Dissipation Factor Tester is a high-precision instrument for measuring dielectric loss angle (tan δ) and volume resistivity of insulating oils.

It integrates multiple test functions including:

  • Dielectric loss testing

  • Temperature-controlled oil cup

  • Precision temperature sensing

  • AC/DC high-voltage output

  • Built-in standard capacitor

  • High resistance measurement

Using high-frequency induction heating, the TD.100 ensures uniform, fast, and efficient heating without direct contact between oil cup and heating unit. Its AC-DC-AC conversion design eliminates issues caused by power fluctuations, making it suitable for both laboratory and field testing, even with generators.

The built-in SF6 three-pole capacitor ensures long-term stability and accuracy regardless of environmental temperature or humidity.

Key Features

  • Advanced Heating System – High-frequency induction stove with CPU-controlled PWM for fast and stable heating.

  • Accurate Temperature Control – PID-based system maintains uniform heating with ±0.5°C precision.

  • Dielectric Loss Measurement – DSP digital signal processing with FFT filtering ensures precise tgδ, Cx, and ε measurement.

  • Volume Resistance Measurement – Direct high testing current, amplified and processed via DSP, provides accurate Rx and ρ values.

  • Automatic Calculations – εr (relative dielectric loss constant) and ρ (volume resistivity) calculated automatically.

  • User-Friendly Operation – Fully digital display, automated test process, and stable results under fluctuating supply conditions.

Technical Specifications

  • Condition of Use: –5℃ ∽ 40℃, RH < 80%

  • Power Source: AC 220V ±10%, frequency independent

  • AC High Voltage Output: 400V ∽ 2200V ±2%, step 100V / 50VA

  • DC High Voltage Output: 200V ∽ 600V ±2%

  • Heating Power: Induction stove, max 500W

  • Temperature Control Range: <100℃

  • Temperature Error: ±0.5℃

  • Control Temperature Error: 0.1℃

  • Heating Time: RT → 90℃ < 20min

  • Measuring Range:

    • tgδ: no limit

    • Cx: 15 pF – 300 pF

    • Rx: 10 MΩ – 20 TΩ

  • Resolution:

    • tgδ: 0.001%

    • Cx: 0.01 pF

    • Rx: 0.01

  • Precision:

    • tgδ: ±(0.5% of reading + 0.020%)

    • Cx: ±(0.5% of reading + 0.5 pF)

    • Rx: ±10% of reading

  • Relative Dielectric Loss Constant (εr): Auto-calculated

  • Volume Resistivity (ρ): Auto-calculated

  • Dimensions: 450 × 310 × 360 mm

  • Weight: 21 kg

Standard Accessories

  • TD.100 Main Instrument – 1

  • Oil Cup – 1

  • Special temperature sensing line – 1

  • Special data acquisition line – 1

  • High voltage test line (2 kV, black/long/clip) – 1

  • Test line (black/long/clip/joint) – 1

  • Special measuring cup (50 ml) – 1

  • AC 220V power wire – 1

  • User manual – 1

  • Certificate – 1

  • Fuse cartridge, print paper (spares) – included

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