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ITU-T K.56 (05/2021)

Protection of radio base stations against lightning discharges

Recommendation ITU-T K.56 presents the techniques applied to a telecommunication radio base

station in order to protect it against lightning discharges. The need of protection is obtained from the

methodology contained in IEC 62305-2, which is used to determine the relevant lightning protection

level (LPL) for the installation. The protection techniques for the external area cover the lightning

protection system (LPS), bonding procedures, earthing and the installation of surge protective devices

(SPDs) at the power meter station. The protection techniques for the equipment building cover the

feeder and lighting cables, the electric power conductors, the telecommunication cabling and the

earthing/bonding procedures applied to cable trays and equipment frames. This Recommendation also

provides guidelines in order to achieve adequate protection of the telecommunication equipment based

on the coordination between equipment resistibility, SPD protection level and installation

characteristics.

Citation:	https://handle.itu.int/11.1002/1000/14293
Series title:	K series: Protection against interference
Approval date:	2021-05-21
Provisional name:	K.rbs
Approval process:	AAP
Status:	In force
Maintenance responsibility:	ITU-T Study Group 5
Further details:	Patent statement(s) Development history

Ed.	ITU-T Recommendation	Status	Summary	Table of Contents	Download
3	K.56 (05/2021)	In force	here	here	here
2.1	K.56 (2010) Cor. 1 (07/2017)	Superseded	here	here	here
2	K.56 (01/2010)	Superseded	here	here	here
1	K.56 (07/2003)	Superseded	here	here	here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
The protection of telecommunication lines and equipment against lightning discharges – Chapters 9 and 10	1995	here
The protection of telecommunication lines and equipment against lightning discharges – Chapters 6, 7 and 8	1978	here
Earthing of telecommunication installations	1976	here

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ITU-T K.56 (05/2021)