IEC 61557-3 specifies the requirements applicable to equipment for measuring the loop impedance between a phase conductor and the protective conductor or between a phase conductor and neutral or between two phase conductors by using the voltage drop when the circuit under test is loaded.
IEC 61557-3 Ed. 3.0 b:2019 History
IEC 61557-3 Ed. 3.0 b:2019
$25.00 $51.00
IEC 61557-3 Ed. 2.0 b:2007
$23.00 $47.00
IEC 61557-3 Ed. 1.0 b:1997
$15.00 $30.00
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