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ISA T1000 PLUS - Page 139

ISA T1000 PLUS
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DOC. MIE91093 Rev. 1.34 Page 139 of 145
In this CT, the nominal voltage knee is 160 V. When Vac is
165 V, formula 1 says 181 V; correspondingly, Formula 2 says
45 mA. Now, go to the Vac value of 181 V, and you find a
current sink of 45 mA: this means that 165 V is the measured
voltage knee.

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