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Electricity class | hardware, insulator “tonnage” how to choose?

Power fittings are graded by “nominal failure load”,

It means the maximum load that a piece of metal can bear.

According to GB2315-2017, it is divided into 18 grades.

Commonly used such as 70kN, 100kN, 120kN, 160kN and so on.

And since 1t = 9.8kN ≈ 10kN

Therefore, terms such as “7 tons, 10 tons” are used to describe the grade of the fittings.

It can be understood as the weight that a piece of gold can bear.

电力新闻8

 

So let’s just take a random image,电力新闻9

The image above is not hard to spot:

A string of metal tools, insulators and wires,

Like a grasshopper on a rope.

So all the parties on the string should have the same tensile strength,

And neither side should be too strong nor too weak.

Too weak will be a weakness,

Too strong is a waste.


Post time: Jul-04-2022