Pin Type Insulator 11kv

The Pin Type Insulator 11kv is used in power distribution. It is placed on the cross arm of the supporting tower. The pin insulator has grooves on the upper end for keeping the conductor. The conductor is tied to the insulator on the top groove on straight line positions and side groove in angle positions by annealed binding wire of the same material as that of the conductor. A lead thimble is cemented into the insulator body to receive the pin.

The pin insulator uses non-conducting material like porcelain, ceramic, silicon rubber, polymer, etc., The weight of the Pin Type Insulator 11kv material is more as compared to porcelain insulator material.

For low voltage, the single piece pin insulator is used, and for high voltage two or more pieces are cemented together for maintaining the proper thickness of the insulator. The insulator provides the adequate path to the leakage current.

The flashover voltage for the moist and dirty surface is less than that for the clean and dry surfaces. The total dry arcing distance is the sum of all the direct distances through the air. It is represented by (a+b+c). The total wet arcing distance is (A+B+C).

Advantages of Pin Insulator

1. It has high mechanical strength.

2. The pin type insulator has good creepage distance.

3. It is used on the high voltage distribution line.

4. The construction of the pin type insulator is simple and requires less maintenance.

5. It can be used vertically as well as horizontally.

Disadvantages of Pin Insulator

1. It should be used with the spindle.

2. It is only used in the distribution line.

3. The voltage rating is limited, i.e., up to 36kV.

4. The pin of the insulator damaged the insulator thread.

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Electricity knowledge: the impact of the cold snap on electricity

Natural disasters, such as lightning strikes, have a small impact and do not cause tripping and downed towers on a large scale. In contrast, the ice build-up on power lines caused by the cold wave has a much greater impact on the power grid, which is characterized by a wide range of impacts. Ice accumulation generally causes mechanical damage to the power grid, such as tower collapse, wire breakage, etc., recovery time is long and difficult; the economic loss of the power grid is serious, recovery and reconstruction investment is huge; severe weather has the occurrence and development process can be predicted.

Generally in early winter or late winter and early spring seasons, the cold wave cooling weather produced by the cloud overcooling liquid precipitation will freeze directly into ice when it touches the ground objects, forming freezing rain. In winter and spring we can often see power lines and tree branches wrapped in or hanging from a layer of crystalline ice and snow, which is freezing rain. Some people equate freezing rain with freezing rain, in fact, freezing rain and freezing rain formation of the physical mechanism and results are indeed the same, but there are still some differences. Freezing rain is a weather phenomenon, while freezing rain is the result of freezing rain, a disaster or landscape.

Cold wave triggered by freezing rain weather will cause to make the power lines accumulated on the freezing rain, freezing rain is the biggest danger is to make the power lines interrupted, high-voltage lines high steel tower in the snowy days, can withstand 2-3 times the weight, but if there is a freezing rain, it may be able to withstand 10-20 times the weight of the wires, power lines or tree branches on the freezing rain, the wires iced up, the contraction of the cold, coupled with the wind blowing caused by the vibration and freezing rain weight of the Influence, can make the power lines and telephone lines do not win the heavy load and was broken, a few kilometers to dozens of kilometers of poles into rows of dumping, resulting in power transmission, communication interruptions, a serious impact on the local industrial and agricultural production. Historically, many cities have seen high-voltage lines collapse in rows because of freezing rain.

Secondly, the impact on power equipment and the cold wave brought about by the windy weather, in the windy weather, should prevent "wind flash" and "dirt flash" caused by short circuit wires, construction sites and elevated work areas of the people to adjust the work schedule to ensure the safety of the electric power and construction industry. Facing the test of cold air must take countermeasures.

In addition, the onset of the cold wave will also increase the load of the power sector, according to the perennial experience of the power sector, the colder it gets, the greater the load of the power grid will be, and the growth rate of the annual increment. Therefore, in order to safely and stably provide electricity services, Beijing Electric Power Company as early as before the arrival of winter, for the city's heating-related units of the office, the various hot spots, boiler rooms and other places of electrical equipment and power supply lines carried out special inspections, and with the electricity customers to establish an emergency contact mechanism, to ensure that the power supply does not affect the heating and power supply due to the power supply. In addition, for electric heating residents of power supply security, reliability of the higher requirements, the power sector will reduce the number of planned equipment outages and time, and actively take technical measures such as electric work, as far as possible not to arrange for electric heating area equipment outages.

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