Insulators general test

Data:2015-08-10 15:23 Source:http://www.ziboinsulators.com Click:

Insulators general tests include:

1. Appearance and dimensional inspection

Visual inspection method of visually observed to be, if necessary, use measuring tools, such as an insulating surface with tiny bubbles or uneven color and can not determine whether or not a good insulator, the product should elect a representative cross-section was above defect inspection or make void tests, such as planing surface inspection found porcelain is not dense (a large number of pores) or osmotic phenomena, is considered to have such a defective product is not up to standard.

Dimensional inspection should be used calipers, ruler and other standard or special measuring gage measurements. Precision measuring tools generally should not be less than 0.5mm. More precise requirements for size deviation and should be adapted to the use of precision measuring tools. Check creepage distances should not be stretched a tape (or wire), take the test in between two electrodes along the surface of the insulating member (semiconductor glaze porcelain surface portion includes, but does not include a conductive adhesive such as cement glue) the amount obtained by the shortest distance. Consisting of a plurality of insulating parts products. The sum of the individual pieces of insulation is its shortest distance.

2. The shape and positional deviation inspection

The shape and position deviation of checks, including checking the parallelism ends, flatness inspection, round hole center axis between the maximum offset inspection, shaft straightness inspection, deformation degree bevel edge inspection, roundness checks, position degree (mounting holes center displacement ) inspection.

3. porosity test

The test piece placed in a container filled with the test solution (per 100g of industrial ethanol, prepared from 1g magenta), applying a pressure of not less than 20 * 106Pa, duration and pressure of the product is not less than 180 * 106h. Pa. Then observe whether the new section penetration phenomenon.