High Voltage Ceramic Capacitor Rod (VDIS Ceramics) for 3.6kV–40.5kV Systems with Ultra-low Partial Discharge and High Insulation Resistance

Our high-performance ceramic capacitor rods (VDIS ceramics) are precision-engineered core components for high voltage presence indicating devices (VPIS/VDIS) in medium-voltage (MV) switchgear. Designed to meet the strict demands of 3.6kV to 40.5kV systems, these rods ensure accurate voltage detection with ultra-low partial discharge, stable insulation resistance, and reliable long-term operation.

Made with high-grade ceramic dielectric materials, our VDIS rods deliver consistent capacitance values, low dielectric loss, and excellent temperature stability, making them ideal for both indoor and outdoor MV equipment assemblies.

• Voltage range: 3.6kV to 40.5kV, covering all common MV applications
• Ultra-low partial discharge: ≤ 10pC at specified test voltages (down to 5pC at 1.1× rated voltage)
• Extremely low dielectric loss: ≤ 0.0040 (tested at 1kHz, 1V)
• High insulation resistance: ≥ 1.0×10⁵ MΩ (1VDC / 1min)
• Excellent lightning impulse withstand capability (up to 185kV peak)
• Temperature characteristics: 2D4 (Y5T), 2B4 (Y5P), DL series available
• Custom screw thread options: M4, M5, M6, M8, M10, M12, M16
• Custom dimensions and capacitance values available upon request
• Compliant with DL/T538-2006 and JB/T10305-2001 standards

• High voltage presence indicating devices (VPIS/VDIS)
• Capacitive voltage sensors and voltage dividers
• Medium voltage (MV) switchgear, ring main units (RMUs), and cubicles
• Epoxy-cast instrument transformers
• 3.6kV / 7.2kV / 12kV / 24kV / 40.5kV power distribution systems