Oil Test Termination
CTT 35(B) Slope-Type Oil Termination
Application: Type and routine tests for 35kV-class single-core cables per IEC 60840
Electrical Test Capabilities
| Test Type | Voltage Rating | Duration/Sensitivity | Standard |
|---|---|---|---|
| AC Withstand | 100 kV | 5 minutes minimum | IEC 60502-2 |
| Partial Discharge | 95 kV | <2 pC detection | IEC 60270 |
Note: PD background noise must be <1 pC during calibration
Mechanical Design
Cable Interface
Core Size: 60mm² cross-section
Semiconductor Strip: 45±2mm length
Configuration: Single-core design
Physical Dimensions
Insulation Cup: Ø150×1100mm
Base Plate: 1090×1360mm (Sloped)
Oil Volume: ≈38L at operating level
Dielectric Fluid Specifications
| Parameter | Mineral Oil | Freon TE |
|---|---|---|
| Breakdown Voltage | ≥60 kV/2.5mm | ≥45 kV/2.5mm |
| Operating Temp | -20°C to +50°C | -40°C to +40°C |
| Replacement Cycle | 5 years/100 tests | 10 years (sealed) |
Installation Protocol
Position termination at 15°-20° slope (per baseplate design)
Fill oil to 50mm above cable entry point
Degas fluid until moisture <10 ppm (IEC 60814)
Pre-test verification: 1.2× rated voltage for 1 minute
Safety Margin: Maintain 1.5m clearance from grounded objects during 100kV tests
Compliance & Certification
AC testing meets IEC 60502-2 Annex C
PD sensitivity conforms to IEC 60270 Class II
Oil quality per IEC 60296 Class II
Mechanical design per IEEE Std 48-2020
