Protection of Digital Telecom Exchanges Against Lightning Surges and Earth Faults

Reddy, Subba B and Verma, Alok Ranjan (2015) Protection of Digital Telecom Exchanges Against Lightning Surges and Earth Faults. In: IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS, 51 (6, 2). pp. 5305-5311.

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Abstract

Low-power electronic devices used in digital telecom exchanges are vulnerable to surge voltages and currents primarily originating from natural lightning or due to the direct interactions between electric power and telecommunication lines, etc., causing the earth/ground potential rise, neutral potential rise, and faults in the system. The fault currents may flow directly to telecom lines or through the equipment to the customer's premises, causing adequate damage to the equipment and personnel safety. In wireline applications, analog or digital, central office, exchanges, and subscriber sides have to be protected. Decisive protection and protective methods have to be employed for proper functioning of the equipment under overvoltage/overcurrent conditions. Current investigation reports some interesting results obtained on the recently developed high-voltage high-current protection cards used in digital telecom exchanges. The performances of protection cards both for the ring wave and hybrid wave surges are evaluated and presented. The surge generators required for the investigation are developed and fabricated in house as per the relevant telecom standards.

Item Type:	Journal Article
Publication:	IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
Publisher:	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Additional Information:	Copy right for this article belongs to the IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC, 445 HOES LANE, PISCATAWAY, NJ 08855-4141 USA
Keywords:	Digital telecom exchanges; earth faults; hybrid wave; lightning; overvoltages; protection equipment; ring wave; simulation; surge generator; telecommunication
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	02 Jan 2016 10:17
Last Modified:	02 Jan 2016 10:17
URI:	http://eprints.iisc.ac.in/id/eprint/53014

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