RO
SR EN 61557-3:2007
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
This part of IEC 61557 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. This second edition cancels and replaces the first edition published in 1997. This edition constitutes a technical revision. The following changes were made with respect to the previous edition: a) definitions complemented; b) revision of some requirements; c) addition of information on operating instructions; d) addition of new influence quantities E9 and E10.
Status :
Withdrawn
Approval date : 9/27/2007
Publish date : 9/29/2007
Withdrawal date : 4/6/2025
Number of pages : 14
ICS : 17.220.20 Measurements of electical and magnetic quantities,29.080.01 Electrical insulation in general,29.240.01 Power transmission and distribution network in general
Technical Committee : 166 - Measuring equipment for electrical and electromagnetic quantities
- Replaces SR EN 61557-3:2002
- Normative reference SR EN 61557-1:2007
- Normative reference SR EN 61010-1:2002
- Replaced by SR EN IEC 61557-3:2022