IEEE 487 1980

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IEEE Guide for the Protection of Wire-Line Communication Facilities Serving Electric Power Stations

Published By	Publication Date	Number of Pages
IEEE	1980	84

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Description

New IEEE Standard – Inactive – Superseded. Superseded by 487-1992. Workable methods for protecting wire-line communication circuits entering power stations are presented. This document covers: the electric power station environment; protection apparatus; services types, reliability, service performance objective classifications, and transmission considerations; protection theory and philosophy; protection configurations; installation and inspection; and safety.

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PDF Pages	PDF Title
9	1 Introduction
10	Electric Power Station Environment 2.1 General Ground Potential Rise (GPR)
11	Example of Asymmetrical GPR Waveform Fig
12	2.3 Longitudinal Induction Ground Grid with Respect to Remote Earth
13	Schematic Illustration of Power Station Ground Potential Rise Fig
14	2.4 Lightning Lightning Surge Representation Fig
15	Distribution of Lightning Stroke Currents Fig Isokeraunic Chart for US and Canada Fig Fig
16	2.5 Switching Surges Protection Apparatus 3.1 General Carbon Block Protectors Gas Filled Protectors Fig
17	3.4 SparkGaps 3.5 HomGaps Surge (Lightning) Arresters 3.7 Isolating Transformers 3.8 Neutralizing Transformers 3.9 Drainage Units High-Voltage Isolating Relays Isolating Transformers with High-Voltage Isolating Relays High-Voltage Telephone Repeaters Short Circuiting or Grounding Relays Special Combination Protective Devices (Open-Wire or Hot Line Protectors)
18	Optical Coupler High-Voltage Disconnect Jacks Overhead Insulated Ground (Static or Sky) Wire Coupling Protector Cable in the Zone of Influence and Transmission Considerations 4.1 General 4.2 ServiceTypes Service Performance Objective (SPO) Classifications
19	Class A Service Performance Objective Considerations Class B Service Performance Considerations Class C Service Performance Considerations 4.7 Transmission Considerations
20	Protection Theory and Philosophy 5.1 Introduction Special Protective System Design Requirements
21	5.3 Dedicated Cable 5.4 Resistive Balance
22	5.5 ConceptsandConcems Other Telephone Subscribers in the Power Staton Zone of Influence
23	GPR Voltage Gradient Fig Voltage Gradient Along General-Use Cable Fig
24	Full Count Protection Applied at the Remote Drainage Location
25	Neutralizing Transformer Theory and Design Concepts NT Operation – The 3-Winding Neutralizing Transformer AlongCableRoute
26	3-Winding Neutralizing Transformer Fig
28	Characteristic for Typical Neutralizing Transformer
29	Function of the X/R Ratio of the Power System
30	InitiationofFault Function of X/R Ratio and Elapsed Time Since Fault Initiation
31	Neutralizing Transformer Concept – Design Alternatives
32	Function of Applied Volt- Seconds Function of Applied Volt- Seconds
35	Protection Configurations 7.1 General Ground Potential Rise (GPR) Plus Induced Voltage Levels Typical Excitation Characteristics
36	Basic Protection for Voltage Level I All Service Classifications (See
37	Basic Protection System Protection Configurations Employing Isolation Devices Services Only (See
38	Basic Isolation Protection Configuration
39	General Isolation Protection Configuration General Isolation Protection Configuration Between Two Power Stations
40	Composite Protection System
42	Protection Configurations Employing Neutralizing Transformers Neutralizing Transformer Installation Protection
43	Parallel with Isolation on Separate Pairs
44	Tandem with Isolation Typical Isolated and Neutralized Services in Parallel or Separate Pairs
45	Grounding Relays and Open Wire Overhead Insulated Ground Wires with an Isolating Transformer
46	3-Winding Neutralizing Transformers in Tandem with an Isolating Transformer
47	Protection Guide for Power Station Services Coupling Protectors
48	Typical Protection Table for Power Station Services
49	Simplified Protection Schematic Chart for a Power Station
51	Installation and Inspection Considerations Installation Considerations Related to Neutralizing Transformers Foundation and Grounding Diagram
52	8.2 Periodic Inspection
53	9 Safety General Safety Considerations Safety Considerations in Equipment Design
54	Safety Related to Installation and Maintenance Activities of Other Standards Writing and Other Technical Organizations
55	11 Summary
56	References and Bibliography
57	Annex A Protection Apparatus Air Gap Protectors Carbon Electrode Protector Units Typical Sparkover Values
58	Gas Tube Characteristics Spark-Gap Break Down Voltages
59	Two Element Gas Tube Protectors Only Three Element Gas Tube Protector Only Typical Voltage Characteristics of a Two-Electrode Gas Tube Protector
60	Typical Operating Characteristics of a 3-Electrode Gas Tube Sparkover Characteristics of Discharge Gaps in Argon Gas at 0.1 Atmosphere Table A4 Typical Operating Characteristics of a 2-Electrode Gas Tube
61	Surge (Lightning) Arrester Characteristics Isolating or Combined Isolating and Drainage Transformers Type (RM) Surge Arresters
65	Typical Maximum Exciting Current Versus Percentage of Rated Voltage at 60 Hz
66	Telephone-Type Drainage Units
67	Typical Specification for a High-Voltage Isolating Relay
68	Isolating Transformer with High-Voltage Isolating Relay Sample Circuit Diagram of an Isolation Device for Telephone Service
69	High-Voltage Telephone Repeater
70	A10 Special Combination Protective Devices (Open Wire or Hot Line Protector) Typical Specifications for an Open-Wire Line Telephone Protector
71	All GroundingRelays A – Typical Grounding Relay B – Schematic of Grounding Relay Typical Specifications for Grounding Relays
72	A12 Typical Specification for Optical Coupler C – Light-Duty Grounding Relay in a Typical Protective Circuit and Drainage Transformer The Optical Couple
73	A14.CableintheZoneofInfluence Fig A10 Types of Bantam Plugs
74	Instrinsic Surge Dielectric Capability
75	Annex B Comparison of Protector Gap Characteristics (Carbon Blocks and Gas Tubes)
76	Annex C Protection of Isolating and Neutralizing Transformers by Lightning Arresters
78	Various Communication Channels
79	Telephone Channels Used for Power Station Communications
80	Design Specification
82	Annex G Neutralizing Transformer Installation Design Examples

Additional information

Standard Title	IEEE Guide for the Protection of Wire-Line Communication Facilities Serving Electric Power Stations
Published Code	IEEE
Publication Date	1980
Pages Count	84

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IEEE 487 1980

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