Cable approach, supervision requirements test insulation resistance, how to test, with what kind of form, standard test record is what?
Cable insulation resistance measurement is not a test of the whole cable, the construction unit should be in place before laying, can be measured, the general requirements of 380V power cable is not less than 500 billion ohms, generally in 200-300 or infinity, using 500V or 1000V megger, between the test line and the line core insulation resistance between the lines if not, by the local quality inspection station for compulsory table, you can refer to the statistical standard of petrochemical SH3503 form of power cable insulation test record, in fact do supervision only record, the construction unit construction unit requirements for reporting, reporting power cable insulation test records.Of course, you must check the entry into cable material inspection, especially on the copper core cable sectional area measurement.
According to the voltage level of the cable, the insulating shake table suitable measurement, phase insulation (armor), relative to the insulation resistance, form can be used to record their preparation, test instruments, weather, temperature, operating personnel, personnel records.
It should be the first to use 500V or 1000V megger whole cable conduction and insulation (i.e., wire and wire core wire to the insulation resistance between), check whether there is a breakpoint or cable or insulation resistance can meet the requirement, and then during laying. After laying, check each cable to see if there is any damage to the cable during the laying.