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Pin Insulator
The pin insulator is a type of low voltage insulators used in power transmission lines and distribution lines for 11 kV up to 33kV.
The insulator is supported on a pole top pin, and grip itself to the pin, hence the name pin insulator.
Pin insulators can be made of porcelain, ceramic, silicon rubber, polymer, etc. Pin insulator is usually placed on a telegraph, utility pole or tower, with cables and wires tied to the top of them. To protect the inner parts from the rain and keep them insulated, It is designed in the sharp of an umbrella or an upside-down bowl.
The pole top pin is usually made of galvanized steel, and it can hold the pin insulator in a vertical or horizontal position. It should be long enough to bear the high voltage and great tension on the conductor.
The price of the pin insulator is comparatively low among all the electrical insulators, especially the regular models made of porcelain. Powertelcom is a pin insulator manufacturer that can supply more types with different designs, materials, and standard specifications.
| TYPE | P-6-Y | P-11-Y | P-22Y | P-33-Y | P-33-Y/900 | |||||
| Class ANSI | 56-1 | 56-2 | 56-3 | 56-4 | 56-5 | |||||
| Fig. No. | 1 | 1 | 2 | 2 | 3 | |||||
| Main Dimension(mm) | H | 109 | 133 | 165 | 191 | 245 | ||||
| h | 48 | 48 | 52 | 52 | 53 | |||||
| D | 102 | 140 | 230 | 267 | 320 | |||||
| d | 18.3 | 18.3 | 27.8 | 27.8 | 27.8 | |||||
| R1 | 9.5 | 13 | 19 | 19 | 19 | |||||
| R2 | 9.5 | 9.5 | 14 | 14 | 16 | |||||
| Nominal Voltage kV | 3.6/6.6 | 11 | 22 | 33 | 33 | |||||
| Creepage Distance/mm | 150 | 255 | 432 | 533 | 900 | |||||
| Low Frequency Voltage(kV) | Dry withstand | 50 | 50 | 65 | 65 | 100 | 100 | 120 | 120 | 200 |
| Wet withstand | 30 | 30 | 45 | 45 | 65 | 65 | 70 | 70 | 95 | |
| Puncture | 95 | 95 | 135 | 135 | 160 | 160 | 170 | 170 | 185 | |
| Cantilever Strength (kN) | 11 | 11 | 11 | 13 | 10 | |||||
What is pin insulator?
Pin insulator is a type of electrical insulator used to insulate wires up to 33 KV in the distribution line.
How to use a pin insulator?
A pin insulator is composed of two components: The porcelain part, and a pole top pin made of steel. A pin insulator is positioned on the cross arm of a utility pole or tower, With the conductor tied to the insulator on the top groove.
Features of pin insulators
- High mechanical strength
- Good creepage distance
- Relatively low prices
- Up to 33 KV
- Simple construction，
- Easy maintenance.
- It can be used vertically and horizontally.