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Work item:
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K.120 (ex K.lem)
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Subject/title:
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Lightning Protection and Earthing of Miniature Base Station
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Status:
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Approved on 2016-12-14 [Issued from previous study period]
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Approval process:
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AAP
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Type of work item:
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Recommendation
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Version:
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New
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Equivalent number:
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-
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Timing:
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-
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Liaison:
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-
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Supporting members:
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-
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Summary:
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This Recommendation provides guidelines for lightning protection and earthing of miniature base station. Miniature base station is a new type of radio base station, which is different from distribution base station (DBS) in many respects. Among those, the change of installation environment is the critical factor to affect the lightning protection of miniature base station.
Miniature base station has the low RF power and small volume, which is suitable for coverage of hotspot and/or blind area to improve the communication quality. Usually, miniature base station is installed in ordinarily residential or urban densely populated area (unconventional telecommunication site), for example ceiling (indoor) , external wall, advertising board, rooftop, street lighting pole, low-voltage power pole, and so on, in which the resource of installation, wiring and earthing is gained hardly.
In comparison, distribution base station, within the domain of macro base station, has the high RF power and large volume, which is suitable for wide area coverage. Usually, DBS is installed in conventional telecommunication environment, in which the resource of installation, wiring and earthing is gained easily.
Though some installation scenarios are covered by [ITU-T K.97], lightning protection of miniature base station is not fully specified in ITU-T K series Recommendations.
The purpose of this Recommendation is to give guidance on protection of miniature base stations against lightning surge, especially for those of unexposed environments (to lightning) and unconventional telecommunication sites.
Protection of miniature base station is achieved by either surge protective devices or/and components or isolation of interfaces.
For those earthing is not available or obtained hardly, the base station can be unearthed (floating) when the safety measures against electric shock is considered adequately.
Bonding configurations of the protection module and of the optical fibre cable are also illustrated.
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Comment:
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-
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Reference(s):
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Historic references:
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Contact(s):
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| ITU-T A.5 justification(s): |
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First registration in the WP:
2015-01-06 17:34:49
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Last update:
2016-12-21 16:25:09
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