NDLI: Powering remote locations from central offices

Content Provider	IEEE Xplore Digital Library
Author	Silverman, E.J.
Copyright Year	1988
Description	Author affiliation: Bellcore, Morristown, NJ, USA (Silverman, E.J.)
Abstract	The author describes a study examining the feasibility of powering remote locations (controlled environmental huts, underground enclosures, or remotely located equipment in commercial office buildings) from the central office by using existing outside plant distribution cables made surplus by the use of fiber-optic technology. The most common source in a central office, -48 V, although attractive from an availability point, cannot provide sufficient voltage to overcome the loop voltage drop in 12000 feet of 22-gauge, 1100-pair cable at 75 A. Voltages such as 130 V can supply sufficient voltage to overcome the loop voltage drop since the current would be less for the same power in the transmission path. However, the using location is designed to operate with a voltage of -48 V, and DC-to-DC converters are needed to convert the voltage to -48 V. It is concluded that these types of converters are technically feasible (130 V to -48 V at 75 A) and could be obtained from power supply manufacturers. However, other technical factors, raise some concerns as to the practicality of powering remote locations from the central office. In addition, it is shown that the estimated cost to provide the 130 V to -48 V conversion equipment at the remote location and the central office source makes the use of central office power as a source of power to remote locations economically unreasonable.
Starting Page	320
Ending Page	325
File Size	496517
Page Count	6
File Format	PDF
DOI	10.1109/INTLEC.1988.22369
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1988-10-30
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Central office Voltage Optical fiber cables DC-DC power converters Centralized control Underground power cables Optical fiber devices Availability Power supplies Manufacturing
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in