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My meter is measuring 0A and 0kW but correctly reads the Voltage, what’s wrong?

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).



Original article#16720

Last Revised: June 22 2007


All content © 1992-2007 Schneider Electric

Legacy KB System (APS) Data: RESL186686 V1.0, Originally authored by KBAdPM on 07/06/2007, Last Edited by KBAdPM on 07/06/2007
Related ranges: ION8800, ION8600, ION7550/ION7650, ION7300, ION6200
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