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Questions and Answers on Construction Technology of Overhead Transmission Lines

1. What is the main task of line lightning protection and grounding?

(1) Prevent lightning from destroying the wires and causing major accidents.

(2) Prevent the high voltage formed by lightning from destroying the line insulation and causing a counterattack.

2. The raw materials and equipment used in the transmission line project should meet those requirements?

The raw materials and equipment used in the transmission line project should meet the following requirements:

1) There should be a certificate of factory quality inspection for the batch of products;

2) There should be various quality inspection materials that meet the current national standards;

3) For sand, stone and other raw materials without quality inspection data, samples should be sampled and inspected by qualified inspection units, and they can be used only after they are qualified;

4) When there is doubt about the result of product inspection, it should be tested and passed the technical appraisal of the professional department to prove that its quality meets the design requirements and relevant standards before it can be used.

3. What are the raw materials and equipment that must be re-inspected?

(1) The storage period exceeds the prescribed period;

(2) Possibility of deterioration due to poor storage;

(3) The samples are not taken according to the standard or the samples are not representative.

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