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Spring strap contact finger: application of spring strap contact finger in high voltage electrical apparatus


Release time:

2021-10-09

The application of spring strap contact fingers in high-voltage electrical appliances. In the power transmission and distribution industry, electrical connections must have three characteristics: safety and stability. The very small heating power, very small contact resistance and stable and uniform contact force of the spring strap can ensure good electrical connection performance. Combined with the actual design requirements and experience, the spring strap contact finger is briefly introduced.

Spring strap contact finger: application of spring strap contact finger in high voltage electrical apparatus

Application of spring strap finger in high voltage electrical apparatus

In the power transmission and distribution industry, electrical connections must have three characteristics: safety and stability. The very small heating power, very small contact resistance and stable and uniform contact force of the spring strap can ensure good electrical connection performance. Combined with the actual design requirements and experience, the spring strap contact finger is briefly introduced.

公司主营产品有GIL连接器、铍钴铜、表带触指、弹簧触指、异型梅花触头、复合表带触指、充电桩电流连接器、铬锆铜、铜合金、铜合金弹簧等。

Common problems and causes of electrical connection

The main failure mechanism of electrical connection is poor contact, which is generally manifested as increased contact resistance or unstable contact resistance. Poor electrical contact will cause abnormal heat generation of the product, exceeding the allowable temperature rise value specified in relevant standards, thereby affecting the insulation capacity of the product and even causing a short circuit.

Technical introduction of spring strap contact fingers

Common finger types on the market are spring strap finger, spring finger, plum finger, self-employed finger, etc. Reliable electrical connections are essential to power equipment and power systems, so choosing the right touch scheme is crucial.

contact theory

Electrical connection refers to the electrical energy transmission connection between conductors by mechanical force. However, the contact surface (surface contact area) generated by this mechanical force is not equal to the effective contact surface of the load current. The pollution layer on the metal surface includes ash layer, oil film and metal compound, so that the effective contact area is much smaller than the surface contact area, and the current channel is concentrated in a single contact point, resulting in an increase in contact resistance. In other words, what appears to be a connection between faces is actually a connection between points and points.

Spring strap touch finger

Spring strap touch technology has been on the market since the early 1960 s and has been successfully applied for more than half a century. It has become a very good choice for demanding applications: it can operate safely in environments with strict requirements on temperature, vibration and shock; high current, very suitable for high-load high-voltage switches; high number of plugs, it can fully meet the life of the switch Test requirements. Compared with the spring finger, the advantages of the spring strap contact finger are mainly concentrated in three aspects: small slot size, low contact resistance, and high stability.

Technical trends for spring strap contact fingers

Miniaturization is the trend of GIS development in the future, and the spring strap contact finger technology is also adapting to this change and developing towards compactness.

Spring strap contact finger as an electrical connector, widely used in combination appliances, circuit breakers, transformers, switch cabinets, gas insulated bus and other electrical products. The spring strap has very small heating power, very small contact resistance, and stable and uniform contact force, which can ensure a good electrical connection, thereby bringing more and more long-term benefits to the power system.

The main products of Nantong Moore New Material Technology Co., Ltd. are GIL connector, beryllium cobalt copper, watchband contact finger, spring contact finger, special-shaped plum contact finger, composite watchband contact finger, charging pile current connector, chrome zirconium copper, copper alloy, copper alloy spring, etc. Nantong Moore New Material Technology Co., Ltd. is developed from its predecessor Nantong Moore Electric Co., Ltd., which is an enterprise specializing in the design, development and research of high-strength and high-conductivity alloy materials and electrical connection products. Companies in the industry has achieved a high degree of recognition and reputation of the majority of customers. The company in line with professional advanced, pioneering spirit, set up rigorous and pragmatic, the basic concept. To do a product, cast a boutique for the purpose of the enterprise, and give full play to the characteristics of flexible and diverse enterprises, intentions to serve every customer.

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