// Porcelain Distribution Series
33kV High Voltage Pin Insulator (AS2947.2)
Premium brown porcelain pin insulator engineered for 33kV overhead distribution lines. Features a Semi-Conducting Glaze Head (black top) to eliminate radio interference (RIF), ensuring strict compliance with Australian Standard AS2947.2.
Rated Voltage
33 kV
Creepage
920 mm
Standard
AS 2947.2
Failing Load
11 kN
Radio Interference Free (RIF) Technology
The defining feature of this insulator is the black semi-conducting glaze applied to the head and pinhole area. This conductive layer bonds with the standard brown glaze, effectively suppressing corona discharge and radio interference even under high voltage stress. Ideal for residential zones and telecommunication crossings.
Compliance & Material
- Standard: Fully compliant with AS 2947.2 (Australia/New Zealand Standards).
- Material: C-130 High-strength Aluminous Porcelain.
- Application: High voltage distribution networks (11kV - 33kV).
| Model Designation | ALP/33/920 |
|---|---|
| Design Figure | Fig. 8 (Multi-skirt) |
| Rated Voltage | 33 kV |
| Creepage Distance | 920 mm |
| Lightning Impulse Withstand | 220 kV |
| Wet Power Frequency Withstand | 90 kV |
| Minimum Failing Load | 11 kN |
| Dimensions (Dia x Height) | 240mm x 320mm |
| Recommended Spindle | C/300/7 |
Detailed engineering drawings (Fig 6 - Fig 10) available in PDF format.
DOWNLOAD AS2947 DRAWING SETFAQ: AS2947 Pin Insulators
What is the purpose of the black top (Semi-conducting Glaze)?
The black top is a specialized semi-conducting glaze. It is designed to suppress radio frequency interference (RFI) caused by corona discharge, which is a mandatory requirement for AS2947.2 compliance in residential and sensitive zones.
Do you offer the 22kV version (ALP/22/450)?
Yes, Vuulcan supplies the full range of AS standard pin insulators, including the ALP/11 (11kV) and ALP/22 (22kV) series shown in Figures 6 and 7 of the standard.
What spindle fits the ALP/33/920 model?
According to the AS standard specification, the recommended spindle type for the ALP/33/920 is the C/300/7 designation. We can supply matching spindles upon request.