Low voltage distribution cabinet, bus row insulation resistance measurement of the whole process, to be safe and detailed Oh!
Make sure the bus line and the peripheral connection are disconnected;
1. Prepare a piece of 500V insulation resistance test equipment (within the validity period and confirm the qualification);2. Switch off the entrance and exit line, take off the two lines such as the control, measurement and so on connected to the bus line (such as through the micro break or fuse, can be directly separated or removed);
The insulation resistance tester "L" terminal busbar A phase. The "E" terminal cabinet line, B, C, N phase wires connected to the earthing line, press the test button to test the data after the reading of the measured value, this is the insulation resistance value of A-BCNE, then turn off L, E line, A bus to discharge; the qualified standard is not less than 500 billion euro (not less than 1000 euro / V);
