GB/T 3048.5-2007 Translated English of Chinese Standard. (GBT 3048.5-2007, GB/T3048.5-2007, GBT3048.5-2007): Test methods for electrical properties of electric cables and wires - Part 5: Test of insulation resistanceThis Part of GB/T 3048 specifies the terms and definitions, test equipment, sample preparation, test procedures, test results and calculation, cautions, and test record of DC comparison method and voltage-current method for the measurement of insulation resistance. |
Contents
4 The specifications of the rounding of the calculation numbers are deleted | 6 |
Foreword | 7 |
Test Equipment | 8 |
Sample Preparation | 11 |
Test Result and Calculation | 13 |
Precautions | 14 |
Test Data Sheet | 15 |
Common terms and phrases
100 times larger 3.2 Volume resistance according to Formula Actual measurement length analog-digital converter anti-interference armor layer bridge circuit Cable samples calculated according circuit switch components shall meet conducted conductor critical resistance Cut a sample DC comparison method DC power supply DC voltmeter effective length electric resistance environment temperature exceed exposed length external diameter following requirements galvanometer GB/T High resistance DC input instrument instructions insulating surface insulation resistance value kilometer length layer or armor length at 20°C measure the insulation measured insulation resistance measuring error meet the following metallic sheath method and voltage-current method is 104 Methods for Electrical multi-core cables output voltage product standard protection ring relative error resistance DC amplifier rest wire cores Result and Calculation sample is tested sheath or shielding shielding layers specified in 6.7 standard resistor temperature correction terms and definitions Test charging Test methods test result test temperature thermal insulation voltage-current method Zhongzhu