IEEE C62.55-2020 pdf download

10-13-2020 comment

IEEE C62.55-2020 pdf free download.The title is IEEE Guide for Surge Protection of DC Power Feeds to Remote Radio Heads.
The waveform of currents likely to exist on dc feeds to equipment located at the tops of towers due to a lightning strike, and the consequences of that waveform for protector design, are described in this guide.
Keywords: EEE C62.55,lightning powering feed, protection, remote radio head, RRh, SPD,surge protective device, surge waveform, towers.
This revision of IEEE Std C62.55-2017 includes the corrections indicated in IEEE Std C62.55-2017/Cor 1-2018,and updating the clause on multiple strokes and continuing current. It also includes updates to the original 2017 version.
1. Overview
This guide begins by discussing the characteristics of lightning flashes having a single stroke that might strike a tower. The nature of the resulting current on the de feed is then discussed. Next, consideration is given to lightning flashes having multiple strokes. Finally, guidance on selecting a surge protective device (SPD) for the dc feed and practical considerations are discussed.
1.1 Scope
This guide covers the application of SPDs used to protect the dc power feeds of remote radio heads (RRHs) and power supplies of optical fiber cable systems feeding the antenna systems.
1.2 Word usage
The word ha indicates mandatory requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted( hal equals is required to).
7. The surge on a dc feed
Towers, regardless of height, are likely to be struck by lightning. which will cause a surge on the RRTI power feed. Because of that, surge protection is needed. What will this protection have to deal with? Two use cases illustrate the issue. The details of these cases can be found in Zafiris [B30] and Xiong [B28].In both cases. a simulated tower and metal-oxide varistor (MOV) protection were set up in a lab, for example as in Figure 3. or Figure 3, the simulated tower consisted of square steel tubes bent in a U shape to reduce the length of the generator leads, and the feed wire was protected with MOVs at each end.

Download infomation Go to download
Note: If you can share this website on your Facebook,Twitter or others,I will share more.
IEEE 21-1976 pdf download IEEE Standards

IEEE 21-1976 pdf download

IEEE 21-1976 pdf download.IEEE General Requirements and Test Procedure for Outdoor Apparatus Bushings. 1.1 Scope. This standard applies to outdoor power class apparatus bushings which have basic impulse insulation levels of 110 kV and above for use...
Download Now
IEEE 376-1975 pdf download IEEE Standards

IEEE 376-1975 pdf download

IEEE Std 376-1975 pdf download.IEEE Standard for the Measurement of Impulse Strength and Impulse Bandwidth. The importance of the impulse as a concept in engineering work has come about not only because of the extensive use of...
Download Now
IEEE 48-1975 pdf download IEEE Standards

IEEE 48-1975 pdf download

IEEE 48-1975 pdf download.IEEE Standard Test Procedures and Requirements for High-Voltage Alternating-Current Cable Terminations. This standard covers all indoor and outdoor cable terminations used on alternating current cables having laminated or extruded insulation rated 2.5 kV through...
Download Now


Anonymous netizen Fill in information