The type and information of the re-insulated terminals

In the prior art, it is necessary to insulate the current-carrying conductor led out from the circuit breaker or transformer. Generally, the current-carrying conductor from the circuit breaker or transformer is accommodated in an re-insulated terminal assembly. In the power industry, this re-insulated terminal assembly is usually referred to as GIS (gas-insulated switchgear).

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The information of the re-insulated terminals

The type of the re-insulated terminals

The information of the re-insulated terminals

In the prior art, the re-insulated terminal assembly usually includes an insulating sleeve, an insulating umbrella group, and a metal flange. The insulating sleeve is filled with insulating SF6 gas, and the current-carrying conductor led out from the electrical equipment is contained in the insulating sleeve. The insulating umbrella group is formed on the outer wall of the insulating sleeve. The metal flange is attached to the base of the insulating sleeve. The metal flange can be installed on the shell of the electrical equipment so that the whole insulated terminal assembly can be installed on the shell of the electrical equipment.

In the prior art, the cost of the metal flange is high, which increases the manufacturing cost of insulated terminal assembly. In addition, due to the different materials of metal flange and insulating sleeve and their different thermal expansion coefficients, gaps are easy to appear between them, and SF6 gas filled in the insulating sleeve is easy to leak out from the gap between metal flange and insulating sleeve.

In addition, in the prior art, since the metal flange with a larger diameter needs to be directly attached to the base end of the insulating sleeve, the outer diameter of the insulating sleeve must match the diameter of the metal flange, which leads to the larger outer diameter of the insulating sleeve, increases the amount of material used to manufacture the insulating sleeve, and also increases the cost.

The type of the re-insulated terminals

BVVB: copper core PVC insulated PVC sheathed flat (b) wire

AVR: copper core PVC insulated flexible (R) wire for installation (a)

RV: soft copper conductor sheathless cable

Avr: copper core PVC insulated flat flexible wire for installation

RVB: flexible copper conductor flat sheathless cable

RVs: copper core PVC insulated stranded (s) flexible wire for connection

RVV: copper core PVC insulated PVC sheathed flexible wire (the former V represents PVC insulated and the latter V represents PVC sheathed)

Avvo: copper core PVC insulated PVC sheathed flexible cable for installation

Composite insulators include rod suspension insulators, insulating cross arms, post insulators, and hollow insulators. The composite bushing can replace porcelain bushing used in a variety of power equipment, such as transformer, lightning arrester, circuit breaker, capacitive bushing, and cable terminal. Compared with porcelain bushing, it not only has the advantages of high mechanical strength, lightweight and small dimensional tolerance but also can avoid damage caused by the explosion.

1, low-voltage insulator and high-voltage insulator: low-voltage insulator refers to the insulator used for a low-voltage distribution line and communication line. High voltage insulator refers to the insulator used for high voltage and ultra-high voltage overhead transmission lines and substations. To meet the needs of different voltage levels, different numbers of single insulators of the same type are usually used to form insulator strings or multi-section insulating pillars.

2Pollution resistant insulator: measures are mainly taken to increase or increase the insulator skirt or umbrella edge to increase the creepage distance of the insulator and improve the electrical strength of the insulator in the polluted state. At the same time, the structural shape of the umbrella skirt is changed to reduce the natural pollution accumulation on the surface, to improve the anti-pollution flashover performance of the insulator.

The creepage distance of pollution-resistant insulators is generally 20% ~ 30% higher than that of ordinary insulators, or even more. In areas where pollution flashover occurs frequently in China's power grid, it is customary to use pollution-resistant insulators in the shape of a double umbrella structure. This kind of insulator has a strong self-cleaning ability and is easy to be cleaned manually.

2. DC insulator: mainly refers to the disc insulator used in DC transmission.DC insulators generally have a longer creepage distance than AC pollution-resistant insulators, and their insulating parts have higher volume resistivity. Their connecting fittings shall be equipped with sacrificial electrodes against electrolytic corrosion

In addition, in the prior art, since the metal flange with a larger diameter needs to be directly attached to the base end of the insulating sleeve, the outer diameter of the insulating sleeve must match the diameter of the metal flange, which leads to the larger outer diameter of the insulating sleeve, increases the amount of material used to manufacture the insulating sleeve, and also increases the cost. Ease Industries & Investment Co., Ltd. conducts many tests on the re-insulated terminals for connection before they leave the factory, and the quality qualification rate is guaranteed. If you are in the re-insulated terminals, you can consider our cost-effective products.