Here’s what more than 2,500 business decision-makers around the world say.Download the report
...with the Facility Hero app in hand! Discover how you can optimize your maintenance efforts today.Learn more
Access tailored services, 24/7 self-service and expert help. Anywhere, anytime, any project.Discover now
Everything you need to know about our IoT technology backbone.Learn more
Explore our global offerings or select your country from one of our five regions.Global
Découvrez nos offres globales ou sélectionnez votre pays dans l’une de nos cinq régions.
If the meter is being provided a very small current (0.005A/5mA or less) on the secondary side, the meter will read 0 for the phase current.
Since kW is dependent on the current reading this value will also be zero.
To find out what the minimum Primary starting current is you can calculate as follows:
Primary_Min_Current = 0.005 * CT_Ratio
Where CT_Ratio = CT_Primary/CT_Secondary
CT Ratio = 2000:5 (Primary:Secondary)
Starting Current = 0.005A (Secondary)
CT_Ratio = 2000/5 = 400
Primary_Min_Current > 0.005 * 400 = 2A (primary side load).
Last Revised: June 22 2007
All content © 1992-2007 Schneider Electric