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ITU-T K.77 (01/2009)

Характеристики металлооксидных варисторов для защиты установок электросвязи

В Рекомендации МСЭ-Т K.77 приводятся основные требования, которым должны отвечать металлооксидные варисторы (MOV) для защиты цепей электропитания и схем прохождения сигналов в установках электросвязи от скачков напряжения. Целью данной Рекомендации является предоставление технических инструкций для покупателей и производителей варисторов MOV. Соблюдение этих инструкций позволит обеспечить надлежащее функционирование варисторов в приложениях, для которых они предназначены. Данная Рекомендация предназначена для согласования существующих или планируемых технических спецификаций, выпускаемых производителями MOV, производителями оборудования электросвязи, администрациями или операторами сетей.

Citation:	https://handle.itu.int/11.1002/1000/9659
Series title:	K series: Protection against interference
Approval date:	2009-01-13
Provisional name:	K.var
Approval process:	AAP
Status:	Superseded
Maintenance responsibility:	ITU-T Study Group 5
Further details:	Patent statement(s) Development history

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
2	K.77 (07/2019)	In force	here	here	here
1.2	K.77 (2009) Amd. 1 (12/2013)	Superseded	here	-	here
1.1	K.77 (2009) Cor. 1 (05/2011)	Superseded	here	here	here
1	K.77 (01/2009)	Superseded	here	here	here


ITU-T Supplement	Title	Status	Summary	Table of contents	Download
K Suppl. 3 (10/2015)	ITU-T K.20, K.21, K.45, K.82 – Additional criteria to protect telecommunication cabling during a power cross event	In force	here	here	here
K Suppl. 8 (11/2017)	Resistibility analysis of 5G systems	In force	here	here	here
K Suppl. 9 (05/2019)	5G technology and human exposure to radiofrequency electromagnetic fields	In force	here	here	here
K Suppl. 10 (11/2017)	Analysis of electromagnetic compatibility aspects and definition of requirements for 5G mobile systems	In force	here	here	here
K Suppl. 13 (12/2021)	Radiofrequency electromagnetic field (RF-EMF) exposure levels from mobile and portable devices during different conditions of use	In force	here	here	here
K Suppl. 14 (09/2019)	The impact of RF-EMF exposure limits stricter than the ICNIRP or IEEE guidelines on 4G and 5G mobile network deployment	In force	here	here	here
K Suppl. 16 (10/2022)	Electromagnetic field compliance assessments for 5G wireless networks	In force	here	here	here
K Suppl. 19 (09/2019)	Electromagnetic field (EMF) strength inside underground railway trains	In force	here	here	here
K Suppl. 29 (07/2022)	Electromagnetic field strength inside and outside of electric vehicles using wireless power transfer technology	In force	here	here	here
K Suppl. 32 (06/2023)	Case studies of radio frequency- electromagnetic field (RF-EMF) assessment	In force	here	here	here

Title	Approved on	Download
Mitigation measures for telecommunication installations – Chapter 10	2006	here
Mitigation measures for telecommunication installations	2004	here
Earthing and bonding	2003	here
Guide to the use of ITU-T Publications produced by Study Group 5 aimed at achieving Electromagnetic Compatibility and Safety	2002	here
Earthing of telecommunication installations	1976	here

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ITU-T Recommendations

ITU-T K.77 (01/2009)