Braided Copper Conductor Grounding Devices and Grounding Resistors

Tinned Copper braided sleeve casing will change color and turn yellow when it encounters something containing harmful gases. On the other hand, copper-plated silver changes color and turns yellow because the surface of the silver-plated layer is exposed to the natural atmosphere for a long time, which will also cause oxidation and hair loss. Yellow, when encountering harmful gases such as H2S, SO2, C02, Cl2, etc., the surface of the silver layer will be corroded and discolored, and the discoloration will be more obvious in an environment with high temperature, humidity and sulfur presence, and it may also be a silver-plated silver layer It is relatively thin, and there is friction and scratching during the weaving process, which causes the silver layer to fall off and leak copper.

1. Grounding device
The grounding device can use natural grounding body and artificial grounding body. When designing, the natural grounding body should be fully utilized first.
(1) Natural grounding
It can make full use of the steel structure and structural reinforcement of the building (structure), the steel rails for driving, and the metal sheath of the cables laid underground and the number is not less than 2.
In newly built large and medium-sized buildings, the structural steel bars of the building are used as natural grounding. They are not only durable and save investment, but also have good electrical performance.
(2) Artificial grounding body
There are two basic types of artificial grounding body: vertical grounding body and horizontal grounding body. The vertical grounding body mostly uses angle steel with a cross-section of 50mm×50mm×4mm and a length of 2500mm; the horizontal grounding body mostly uses flat steel with a cross-section of 40mm×4mm.
2. Ground resistance
In the low-voltage neutral point direct grounding system, the grounding resistance of transformers above 100kVA is ≤4Ω.
Tinned Copper Braided Sleeve bushing with flexible connection is mainly used for installation of transformers, power transmission and distribution equipment, high and low voltage switchgear, vacuum appliances, closed busbars, generators and busbars, rectifier equipment, rectifier cabinets and isolating switches, automobile batteries, electric locomotives , Industrial electric furnaces, mine explosion-proof electrical appliances, generator sets, soft connections of carbon brush wires and connections between busbars.