IEC - 61557-3
Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Part 3: Loop impedance
|Publication Date:||1 July 2019|
|ICS Code (Power transmission and distribution networks in general):||29.240.01|
|ICS Code (Measurement of electrical and magnetic quantities):||17.220.20|
|ICS Code (Electrical insulation in general):||29.080.01|
This part of IEC 61557 specifies the requirements applicable to equipment for measuring the loop impedance between a line conductor and protective conductor; between a line conductor and neutral; or between two line conductors by using the voltage drop when the circuit under test is loaded.