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what is the difference between megger and earth tester?
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Answer Posted / saumya ranjan lenka
<1>Megger=Meggar megger means insulation resistance(IR VALUES) of any cable ,wire bus bar etc .ITS UNIT IS OHM
<2>
It only measure earth resistance of pit.ITS UNIT IS OHM.
It has two electrode (i.e potential electrode and current electrode) with respect to earth plate under test. The potential electrode will fixed 15mtr from earth plate under test and current electrode 30mtr from earth plate under test.
<3> IF WE ROTATE THE HANDLE OF EARTH TESTER IN OPEN CONDITION THEN THE READING WILL BE 0 OHMS. BUT MEGGER WILL SHOWS INFINITE OHMS.
<4 >MEGGER HAS THREE TERMINALS <i>LINE
<ii> GUARD
<iii>EARTH
<5>EARTH TESTER HAS THREE TERMINAL <i>E(earth plate under test) <ii>P(potential electrode ) <iii>C( current electrode)
BY ER.SAUMYA RANJAN LENKA, STERLING AND WILSON LTD ,DSP SITE WEST BENGAL
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