How to measure the
actual values of protection grounding and neutral grounding
resistance since there is no soil inside the building to drive
grounding:
First of all, two probes
that need to be connected to the grounding stakes of the megger
are connected to the grounding bar on the panel.
1-Measurement is made by
connecting the megger measurement tip to the neutral end of panel
1. The result is written to measurement number 1.
2-Measurement is made by
connecting the megger measurement tip to the neutral end of panel
2. The result is written to measurement number 2.
3-Measurement is made by
connecting the megger measurement tip to the neutral end of panel
3. The result is written to measurement number
3.
4-
Megger's
two probes,
which need to be connected to the grounding stakes, are connected
to the neutral end of panel 1, and the measurement end is
connected to the neutral end of panel 2. The measurement value is
written to result 4.
By pressing the calculate
button. There will be common protection grounding ohmic value and
neutral ohmic values of transformer 1, transformer
2,
and
transformer
3