What's the different between measured resistance values of IM400 and IFL12
Issue
The user found a big difference between the measured resistance values of IM400 and IFL12 on site,
please explain the measurement principle of IFL's insulation resistance R.
And the difference between insulation resistance R measured by IM400 and IFL12.
Product Line
IM400
IFL12
Cause
The test observations like IM400 measured high value than IFL12. Normally the IM400 will be average of all IFL12 feeder, so the R value in IM400 will be less than or equal to any low value of IFL12 feeder.
The root cause for this behavior can be following:
1. There are 2 IM400 injecting the signals at same time.
2.IFL12 monitoring network signal not connected properly. (example: N/HV is connected and ground terminal is open.
Resolution
In such conditions, the IFL12 will not measure properly. Verify and correct the conditions to get actual R value in IFL12.
The user found a big difference between the measured resistance values of IM400 and IFL12 on site,
please explain the measurement principle of IFL's insulation resistance R.
And the difference between insulation resistance R measured by IM400 and IFL12.
Product Line
IM400
IFL12
Cause
The test observations like IM400 measured high value than IFL12. Normally the IM400 will be average of all IFL12 feeder, so the R value in IM400 will be less than or equal to any low value of IFL12 feeder.
The root cause for this behavior can be following:
1. There are 2 IM400 injecting the signals at same time.
2.IFL12 monitoring network signal not connected properly. (example: N/HV is connected and ground terminal is open.
Resolution
In such conditions, the IFL12 will not measure properly. Verify and correct the conditions to get actual R value in IFL12.
Publié pour: Schneider Electric Belgium
Besoin d'aide ?
Sélectionnez le bon produit
Trouvez rapidement et facilement les produits et accessoires adaptés à vos applications.
Obtenir un devis
Effectuez une demande de renseignements en ligne et un expert vous contactera.
Où acheter ?
Trouvez facilement le distributeur Schneider Electric local le plus proche.
Centre d'aide
Trouvez des ressources de support pour tous vos besoins, en un seul endroit.