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IEEE 487-2015 pdf free

IEEE 487-2015 pdf free.IEEE Standard for the Electrical Protection of Communications Facilities Serving Electric Supply Locations- General Considerations.
IEEE 487 presents general consideration for special HVP systems intended to protect telecommunications facilities serving electric supply locations. This standard contains material common to all of the IEEE 48W’ family of standards including fundamental protection theory and basic electrical protection concepts and designs.
This standard presents general considerations for the clcctrical protection of telecommunications facilities serving electric supply locations. This standard contains material that is common to the IF.F.F. 487 family of standards (i.e.. dot-series) including fundamental protection theory and basic electrical protection concepts and designs. In general, special protective measures, handling procedures, and administrative procedures are necessary to provide electrical protection against damage to telecommunications facilities and equipment. maintain reliability of service. and ensure the safety of personnel.
Other telecommunications alternatives such as poirn-o-point radio and microwave systems are excluded from this standard.
The following referenced documents arc indispensable for the application of this document (i.e., they must be understood and used, so each referenced document is cited in text and its relationship to this document is explained). For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments or corrigenda) applies.
For the purposes of this document, the following terms and definitions apply. The IEEE Standards DicK ionarv Online should be consulted for terms not defined in this clause.
carbon block surge protectise de Ice (carbon block SPI)): An assembly of two or three carbon blocks and air gaps designed to a specific breakdown voltage. These devices are normally connected to telecommunications circuits to provide overvoltage protection and a current path to ground during such overvoltage.
NOTE—Thc manufacturing of carbon blocks has been largely discontinued.
conduclise (reslstlsc) coupling: See: coupling.
coupling: The mode of propagation of disturbing energy from a power system w a telecommunications system. There arc three forms of coupling between the two systems: magnetic (inductive) coupling, electric (capacitive) coupling, and conductive (resistive) coupling, In addition, coupling by electromagnetic radiation exists and is associated with propagation of radiation fields, e.g., radio frequency interference. electromagnetic puke (EMP). and corona.
demarcation point: The point of interconnection between the telecommunications facilities of a provider of wire-line telecommunications service and the subscriber’s terminal equipment. protective apparatus, cables, or wiring.
drainage unit or drainage reactor: A center-tapped inductive device designed to relieve conductor-to- conductor and conductor-to-ground voltage stress by draining extraneous currents to ground. These units are also designed to serve the purpose of a mutual drainage reactor (MDR), forcing near-simultaneous surge protective device (SPD)-gap operation.IEEE 487 pdf download.

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