IEEE 487-2000 pdf download IEEE Recommended Practice for the Protection of Wire-Line Communication Facilities Serving Electric Supply Locations
1. Overview Wire-line telecommunication 1 facilities serving electric supply locations often require special high- voltage protection against the eects of fault-produced ground potential rise or induced voltages, or both. Some of the telecommunication services are used for control and protective relaying purposes and may be called upon to perform critical operations at times of power system faults. This presents a major challenge in the design and protection of the telecommunication system because power system faults can result in the introduction of interfering voltages and currents into the telecommunication circuit at the very time when the circuit is most urgently required to perform its function. Even when critical services are not involved, special high-voltage protection may be required for both personnel safety and plant protection at times of power system faults. Eective protection of any wire-line telecommunication circuit requires coordinated protection on all circuits provided over the same telecommunication cable.
1.1 Scope
This recommended practice presents engineering design practices for special high-voltage protection systems intended to protect wire-line telecommunication facilities serving electric supply locations. The following topics are included in this document:
a) A description of the electric supply locations environment, i.e., ground potential rise (GPR),induced voltages, lightning, and switching transients
b) A discussion of special high-voltage protection devices
c) Denitions of service types and service performance objectives for electric supply locations telecommunication services
d) Special protection theory and philosophy
e) Special protection system design guidelines
f) Personnel safety considerations
g) Grounding
h) Cables with metallic members
Other telecommunication alternatives such as radio and optical ber systems are excluded from this document.
1.2 Purpose
This recommended practice presents workable methods for the protection of wire-line telecommunica- tion facilities serving electric supply locations. In general, special protective measures, handling procedures, and administrative procedures are necessary to provide for personnel safety, protection against damage to telecommunication facilities and terminal equipment, and reliability of service. Disturbances may arise from a number of causes, including the following:
a) Ground (earth) potential rise
b) Longitudinal induction into the serving telecommunication facilities
c) Electrical contact between power and telecommunication conductors
d) Lightning surges and switching transients induced into the telecommunication system
IEEE 487-2000 pdf download
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