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MM-42828_website_ground-resistance-signaling-module_kombi_2000x2000.jpg

Signaalmodule aardingsweerstand

Met de nieuwe signaalmodule aardingsweerstand biedt WAGO de mogelijkheid om in geaard bedrijf - naast de 0V-aarding - ook volledig geautomatiseerd een onderschrijding van een niet-instelbare, asymmetrische isolatieweerstand tussen +24 V c.q. 0 V van de voedingsspanning en aarde te detecteren.

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Eigenschappen

De evolutie van de signaalmodule aardingsweerstand

Enkelvoudige draad

Directe activering van de zekering bij een aardfout
Directe stop van de installatie
Geen voorafgaande waarschuwing

Aarddraad-scheidingsklem - handmatige controle van de isolatieweerstand

Directe activering van de zekering bij een aardfout
Directe stop van de installatie
Detectie van mogelijke aardfouten door regelmatige handmatige onderhoudsintervallen

Signaalmodule aardingsweerstand - automatische controle van de isolatieweerstand

De signaalmodule aardingsweerstand biedt een optimale kosten-batenverhouding en is eenvoudig te gebruiken. Een vervanging van de tot dusverre gebruikte aarddraad-scheidingsklem is probleemloos mogelijk. Er hoeven slechts twee extra draden op de PLC aangesloten te worden om het potentiaalvrije contact te kunnen analyseren.

Voordelen van de signaalmodule aardingsweerstand in vergelijking met de mechanische aarddraad-scheidingsklem in de praktijk

Volautomatische bewaking op mogelijke aardfouten in plaats van een handmatige controle
Inkorting van de testinterval van ca. 3 maanden tot 10 seconden
Directe overdracht door potentiaalvrij contact voor de signalering aan de PLC

Applicatievoorbeelden

Uitgangspunt en resultaat

Upgrade van de aarddraad-scheidingsklem naar signaalmodule aardingsweerstand

Waar momenteel nog een aarddraad-scheidingsklem wordt gebruikt, kan probleemloos een signaalmodule aardingsweerstand voor de volautomatische bewaking worden aangebracht.

Twee netvoedingen DC 24 V hebben slechts één signaalmodule aardingsweerstand nodig

Zelfs bij twee of meerdere parallel geschakelde netvoedingen is één signaalmodule aardingsweerstand voor de aardfoutbewaking voldoende.