Live working - Phase comparators - Part 2: Resistive type to be used for voltages from 1kV to 36 kV a.c.
Live working - Phase comparators - Part 2: Resistive type to be used for voltages from 1kV to 36 kV a.c.
IEC 61481-2:2014 is applicable to portable phase comparators of resistive type to be used on electrical systems for voltages from 1 kV a.c. to 36 kV a.c. and frequencies of 50 Hz and/or 60 Hz. This standard is applicable to phase comparators of resistive type used in contact with the bare conductive parts to be compared as a complete device including its insulating element or as a separate device, adaptable to an insulating stick which, as a separate tool, is not covered by this standard. A device that is designed to provide other functions than phase comparison is a different device and is not covered by this standard. For example a device designed to be also used as a voltage detector is not covered by this standard. This first edition, together with the first edition of IEC 61481-1, cancels and replaces the first edition of IEC 61481 published in 2001, Amendment 1:2002 and Amendment 2:2004. This edition constitutes a technical revision which includes the following major changes: - split of the standard in two parts; - review of the requirements for indication; - elimination of class C (+/- 110°); - introduction of a requirement for a new marking "LU" for limited use; - increase of the specified range of voltage fluctuation in a network for clear indication; - and revision of the existing annexes.
IEC 61481-2:2014 is an international standard established by the International Electrotechnical Commission (IEC) focusing on live working phase comparators of the resistive type designed for use with voltages ranging from 1 kV to 36 kV alternating current (a.c.).* This standard specifically addresses portable phase comparators operating at frequencies of 50 Hz and/or 60 Hz, intended for direct contact with bare conductive parts of electrical systems.
This document represents a technical revision, improving upon previous editions by splitting the standard into two parts, refining indication requirements, removing older classification categories, and introducing new markings for limited usage devices. The standard covers both phase comparators as complete devices including insulating elements and as separate devices adaptable to insulating sticks. It excludes devices designed for functions beyond phase comparison, such as multipurpose voltage detectors.
Упомянутые в описании и другие стандарты IEC
IEC 61481-2:2014 phase comparators are critical tools for electric utility workers, live-line maintenance personnel, and electrical testing engineers. Their primary application is to compare electrical phases safely on energized parts to prevent incorrect connections and ensure operational safety.
Typical uses include:
Adherence to IEC 61481-2 ensures enhanced worker safety, reliable detection in high-voltage environments, and compliance with global live working protocols.
Understanding and applying IEC 61481-2:2014 ensures that resistive phase comparators meet internationally recognized safety, performance, and durability criteria, providing critical support for safe and effective live working in medium-voltage electrical systems.