Med den nya signalmodulen för jordmotstånd i det jordade driftläget erbjuder WAGO inte bara detektering av 0 V-jord, utan även helautomatisk detektering av motståndsvärden under ett icke-justerbart, obalanserat isolationsmotstånd mellan jord och +24 V eller 0 V av matningsspänningen.
Övervakningsmodul för jordfel
I videon, visar Frank Sellke, WAGO Business Development Manager för INTERFACE ELECTRONICS, mer om funktionerna och fördelarna med jordfelsindikatorn.
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Funktioner
Utvecklingen av signalmodulen för jordfel
Entrådig
Säkring löser ut omedelbart vid jordfel
Omedelbar systemavstängning
Förvarning
Frånskiljbar jordplint – Manuellt test av isolationsmotstånd
Säkring löser ut omedelbart vid jordfel
Omedelbar systemavstängning
Detektering av potentiella jordfel genom rutinmässigt manuellt underhåll
Jordfelsindikator – Automatisk testning av isolationsmotstånd
Jordfelsindikatorn erbjuder branschens bästa kostnads-nyttoförhållande och är lätt att använda. Byte av jordfelsindikatorns anslutning är enkelt Endast två extra kablar behöver anslutas till PLCn för att göra den potentialfria kontakten redo för utvärdering.
Fördelar med jordfelsindikatorn jämfört med mekanisk jordledaranslutning – i praktiken
Manuell testning för uppkommande jordfel ersatt av helautomatisk övervakning
Minskning av inspektionsintervallet från ca. 3 månader till 10 sekunder
Omedelbar signalering genom potentialfri kontakt till PLCn
Applikationsexempel
Utgångspunkt och resultat
Uppgradering från plintens jordanslutning till jordfelsindikator
Överallt där en jordledaravskiljningsterminal används, kan en signalmodul för jordfel enkelt eftermonteras för helautomatisk övervakning.
Två 24 VDC nätaggregats krav endasten Jordfelsindikator
Även med två eller flera strömförsörjningsenheter parallellkopplade, en signalmodul för jordfel räcker för jordfelsövervakning.