IEC 61557-3 Revised
IEC 61557-3:1997
Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. - Equipment for testing, measuring or monitoring of protective measures - Part 3: Loop impedance
Specifies requirements for 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.
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.
CHFÂ 20.-
A more recent version of this publication exists:
IEC 61557-3:2019 RLV
Technical committee
TC 85 Measuring equipment for electrical and electromagnetic quantities| Publication type | International Standard |
| Publication date | 1997-02-14 |
| Edition | 1.0 |
| ICS | 17.220.20 29.080.01 29.240.01 |
| Withdrawal date | 2007-01-29 |
| ISBN number | 2831837006 |
| Pages | 15 |
| File size | 97.66 KB |