LQC90 Oil Cup for Liquid Dielectric Loss Measurement

The LQC90 series oil cup is a precision-engineered measuring electrode specifically designed for dielectric loss analysis of liquid insulation materials including power transformer oils, cable oils, and high-voltage capacitor fluids. This IEC-compliant instrument delivers laboratory-grade accuracy for tgδ (tan delta) and relative dielectric constant (ε_r) measurements.

Key Features & Design

Advanced Electrode Configuration

The LQC90 incorporates a shielded triple-electrode system:

• High-voltage electrode (outer): Stainless steel cylinder

• Measuring electrode (inner): Precision-ground surface

• Guard ring: Eliminates stray capacitance

Technical Specifications

Component Breakdown

1. Exhaust port: Ensures bubble-free liquid filling

2. Ceramic insulating column: Maintains 10¹²Ω minimum resistance

3. Shielding guard electrode: Reduces edge effects

4. Precision-ground measuring electrode: Mirror finish (Ra 0.8μm)

5. HV outer electrode: 304 stainless steel construction

6. Locking mechanism: Torque-limited fastening nuts

Applications

This measurement cell is essential for:

• Transformer oil quality assessment per IEC 60247

• Cable impregnation oil dielectric loss monitoring

• Capacitor fluid aging studies

• Research on nanofluids for insulation

Compliance & Interoperability

The LQC90 meets or exceeds:

• IEC 60247 (Liquid dielectric measurements)

• ASTM D924 (Dissipation factor standards)

• DIN 53483 (Dielectric constant testing)

Note: Always degas samples at 50°C for 30 minutes before testing to achieve specified accuracy.