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Insulator experiment

2.1 Finalizing test report
Insulators used in power transmission and transformation projects must be provided with a finalized test report provided by the county of the initial measuring unit with porcelain. It is valid for five years.

2.2 Network trial operation
The choice of dezi should follow the “technology plate mature, advanced technology, reliable original quantity, operation experience” according to the new product grain scene used in 110kV and above voltage level of the project, there should be no less than 1 year of trial run time and no less than 2000 pieces of trial run quantity of the successful supply of words. It records include ll and “1 kind of environment “. A: in some quantities, he can drink t sound, and it is absolutely a thousand æ (b) 4. Three to leisurely son years (burning) self-explosion rate, etc.

2.3 Shape of umbrella fold
The shape of insulator umbrella skirt shall meet the requirements of JB/T 5895. 2.4 Validity of creepage distance
The effective coefficient K of creepage distance shall be determined by natural and artificial pollution tests, and the implicit determination method of K value shall be carried out according to the method specified in Chapter 6 of JBT 5S95-1991. Insulators with high K value should be selected in antifouling design.

2.5 Pollution resistance and self-cleaning
Insulators with good pollution resistance and self-cleaning performance should be selected in combination with natural environment and engineering characteristics.

2.6 Antifouling design
In new construction, expansion or transformation of power transmission and transformation projects, antifouling design can be carried out in one of the following ways. This standard recommends the use of pollution pressure resistance method.

2.6.1 Creepage specific distance method
When the number of insulators is determined by this method, it shall be carried out according to the pollution level of the insulator and the regulation of DL/ T62o and DT S092, and the water retention, self-cleaning performance and the effective coefficient of creepage distance of the selected type of insulator shall be examined.

2.6.2 Pollution pressure resistance method
The number of pieces in the image is determined according to the determined pollution level and the voltage to which the insulator’s artificial polluter must withstand. See appendix C for pollution pressure resistance method. 5.8 Mechanical Characteristics

2.7.1 Rated mechanical tensile grade
Insulators shall be rated from the following grades: 70,100, 120, 160, 210, 240, 300, 400, 420 and 530kN. Insulators shall meet the relevant requirements of DLT S092.

2.7.2 Determination criteria for mechanical characteristics
For the terminators of 330V and above voltage class used for new construction, expansion and reconstruction, the test should be carried out according to the procedure defined in Chapter 19, Chapter 20 and Chapter 21 of GB/ T1001.1-2003. The determination criteria of the test results are as follows: the type test constant and the sampling test constant are both 3.0.