Extech Instruments MG500 Uživatelský manuál stáhnout pdf (Strana 13)

MG500-EU-EN v1.0 7/13

InsulatorMeasurementConsiderations

Insulatorsmaygetcontaminatedovertimefromamixtureofdustandmoisture.Dustand

moistureproblemslowertheresistanceofthe insulatorasthisresistanceisinparallelwiththe

insulatorresistance.Itisrecommendedthattheinsulatorbemeasuredfirstwithouttheoptional

guardlead,toverifythatthe

totalresistanceishigh.Shouldthetotalresistancenotbehigh

enough,thecontaminantsshouldberemovedortheinsulatorreplaced.Testthedirtyinsulator

forproperresistancebytestingwiththeoptionalguardlead.Note:Ifcleaningtheinsulatoris

possible,followtheprocedureofthemanufacturer.



DIRTYINSULATOR

ELECTRICALEQUIVALENT

CIRCUITDIRTYINSULATOR TYPICALTEST

Notes:

Resistanceasaresultofcontaminationcanlowerthetotalresistance.

Cleaningperiodicallycanreducesystempowerconsumption.



1 2 ... 8 9 10 11 12 13 14 15

Žádné komentáře

Extech Instruments MG500 Uživatelský manuál Strana 13