{"id":79634,"date":"2024-10-17T18:36:23","date_gmt":"2024-10-17T18:36:23","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/ieee-1050-1989\/"},"modified":"2024-10-24T19:40:46","modified_gmt":"2024-10-24T19:40:46","slug":"ieee-1050-1989","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/ieee\/ieee-1050-1989\/","title":{"rendered":"IEEE 1050 1989"},"content":{"rendered":"

New IEEE Standard – Inactive – Superseded. Superseded by 1050-1996. Guidance for the design of grounding systems for instrumentation and control equipment specific to large central generating stations is provided. The goal is to achieve both a suitable level of protection for personnel and equipment and suitable electric noise immunity for signal ground references. Requirements for the grounding of systems associated with the interconnection of the station to adjacent substations are considered, since these are a large source of electrical noise. Both ideal theoretical methods and accepted practices in the electric utility industry are presented. Applications relating to advanced energy storage and conversion technologies (photovoltaics, fuel cells, etc.) are not considered. .<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
9<\/td>\n1 Scope
2 Introduction <\/td>\n<\/tr>\n
10<\/td>\n3 Definitions <\/td>\n<\/tr>\n
11<\/td>\n3.1 Acronym List
Electrical Noise Minimization
4.1 Typical Noise Sources and Their Characteristics
4.1.1 Natural Sources
4.1.2 Incidental Sources <\/td>\n<\/tr>\n
13<\/td>\nLine-Notching Waveshape <\/td>\n<\/tr>\n
15<\/td>\n4.1.3 Intentional Sources
4.2 Noise-Coupling Methods
Electrostatic Discharge Noise Generation <\/td>\n<\/tr>\n
16<\/td>\n4.2.1 Characteristics of Electromagnetic Fields
4.2.2 Common Impedance Coupling (Conductive)
4.2.3 Capacitive Coupling (Electric)
Example of Common Impedance Coupling (Ground Loop) <\/td>\n<\/tr>\n
17<\/td>\n4.2.4 Inductive Coupling (Magnetic)
Example of Capacitive Coupling <\/td>\n<\/tr>\n
18<\/td>\n4.2.5 Radiative Coupling (Electromagnetic)
4.2.6 Interference Modes
Example of Inductive Coupling <\/td>\n<\/tr>\n
19<\/td>\n4.3 Techniques for Electrical Noise Minimization
Suppression at the Source
Example of Common and Differential Mode Interference <\/td>\n<\/tr>\n
20<\/td>\nSuppression with a Diode and Series Resistance <\/td>\n<\/tr>\n
21<\/td>\n4.3.3 Shielding <\/td>\n<\/tr>\n
22<\/td>\nCapacitance versus Conductor Separation <\/td>\n<\/tr>\n
23<\/td>\n4.3.4 Grounding
Waveguide Beyond Cutoff Frequency <\/td>\n<\/tr>\n
24<\/td>\n4.3.5 Filters
Fig 10 Diagram of a Closed EM1 Barrier
Fig 11 Realization of Fig <\/td>\n<\/tr>\n
25<\/td>\nOther Noise Minimization Techniques
4.3.7 Summary-Minimization Techniques Classified by Coupling Mechanism <\/td>\n<\/tr>\n
26<\/td>\n5 Grounding
5.1 Grounding Philosophy
5.1.1 Principal Objectives <\/td>\n<\/tr>\n
27<\/td>\n5.1.2 Generating Station Grounding System
Equipment Grounding for Electrical Safety
5.2 Other Grounding Considerations
5.2.1 AC and Signal Ground Buses
5.2.2 Ground Conductor Lengths
Generating Station-to-Substation Interconnect
5.2.4 CT VT and CCVT Grounding <\/td>\n<\/tr>\n
28<\/td>\n5.2.5 Gas Insulated Switchgear
5.2.6 Conduit and Cable Tray Grounding
5.3 Signal Ground Systems
Single-Point Ground System <\/td>\n<\/tr>\n
29<\/td>\nMultiple-Point Ground System
Floating Ground System
5.4 Signal Cable Shield Grounding Requirements
Cable Shield Requirements
Fig 12 Single-Point Ground System <\/td>\n<\/tr>\n
30<\/td>\nFig 13 Single-Point Ground System with Locally Floating Subsystems <\/td>\n<\/tr>\n
31<\/td>\nFig 14 Multiple-Point Ground System for High-Frequency Signals <\/td>\n<\/tr>\n
32<\/td>\nFig 15 Multiple-Point Ground System for Low-Frequency Signals with Large Separation <\/td>\n<\/tr>\n
33<\/td>\nFig 16 Floating Ground System <\/td>\n<\/tr>\n
34<\/td>\nFig 17 Twisted-Pair Control Cables without Shield
Fig 18 Differential Mode Voltage VDM as a Function of Circuit Balance <\/td>\n<\/tr>\n
35<\/td>\n5.4.2 Analysis of Shield Grounding Practices
Fig 19 Shielded Circuit Grounded at One End <\/td>\n<\/tr>\n
36<\/td>\nSignal Source <\/td>\n<\/tr>\n
37<\/td>\nBoth Ends-Ideal <\/td>\n<\/tr>\n
38<\/td>\nCentral Distribution Frame (CDF) Grounding Practice
Fig 22 Shield Grounded at Both Ends-Actual <\/td>\n<\/tr>\n
39<\/td>\n5.4.4 Coaxial Cable
5.4.5 Twisted-Pair Cable
5.4.6 Balanced Circuits <\/td>\n<\/tr>\n
40<\/td>\nFig 23 Common Mode Rejection with Balanced Circuits
Fig 24 Common Mode Rejection Nullified by Ground <\/td>\n<\/tr>\n
41<\/td>\n5.4.7 Other Cable Shielding Considerations
Comparison of Cable Shielding Effectiveness
Generating Station Applications
6.1 General Requirements for Control Loop Grounding
6.1.1 Local Ground
6.1.2 Floating Ground
6.2 Application of Grounding Methods for I&C Systems
6.2.1 Single-Point Ground <\/td>\n<\/tr>\n
42<\/td>\nFig 25 Examples of Locally Grounded Instruments <\/td>\n<\/tr>\n
43<\/td>\n6.2.2 Multiple-Point Ground
Fig 26 Examples of Floating Instrumentation Loops <\/td>\n<\/tr>\n
44<\/td>\n6.2.3 Floating Ground
6.3 Grounding System Design
Equipment Ground (Mechanical or AC Ground)
6.3.2 Signal Ground (Control or DC Ground) <\/td>\n<\/tr>\n
45<\/td>\n6.4 Grounding of a Centralized System
6.5 Grounding of a Distributed System <\/td>\n<\/tr>\n
46<\/td>\nFig 27 Distributed I&C Grounding Arrangement <\/td>\n<\/tr>\n
47<\/td>\n6.5.1 Floating Ground for Digital Communications in a Distributed System
6.6 Grounding of Control Circuits Based on Susceptibility
6.6.1 Grounding for High-Susceptibility Control Circuits
6.6.2 Grounding for Medium-Susceptibility Control Circuits
Fig 28 Grounding Differential Drivers and Receivers <\/td>\n<\/tr>\n
48<\/td>\n6.6.3 Grounding for Low-Susceptibility Control Circuits
Signal Grounding <\/td>\n<\/tr>\n
49<\/td>\n6.7 Grounding for High-Frequency Signals
7 Testing
7.1 General
7.2 Sources of Ground Loops
7.3 Ground Loop Prevention and Detection <\/td>\n<\/tr>\n
50<\/td>\nFig 30 Test for Detection of Ground Loops <\/td>\n<\/tr>\n
51<\/td>\n7.4 Testing for Ground Loops <\/td>\n<\/tr>\n
52<\/td>\n7.5 Signal Ground System Integrity
System
8 Bibliography <\/td>\n<\/tr>\n
56<\/td>\nAppendix
Example of CDF Grounding Arrangement <\/td>\n<\/tr>\n
57<\/td>\nAnalog Control Loops-Ideal <\/td>\n<\/tr>\n
58<\/td>\nAnalog Control Loops-CDF <\/td>\n<\/tr>\n
59<\/td>\nFloating Signal Loops-Ideal <\/td>\n<\/tr>\n
60<\/td>\nFig A5 Floating Signal Loops-CDF <\/td>\n<\/tr>\n
61<\/td>\nGrounded Signal Loops-Ideal <\/td>\n<\/tr>\n
62<\/td>\nGrounded Signal Loops-CDF <\/td>\n<\/tr>\n
63<\/td>\nDigital (Dry Contact) Input-Ideal <\/td>\n<\/tr>\n
64<\/td>\nDigital (Dry Contact) InpuLCDF <\/td>\n<\/tr>\n
65<\/td>\nFig A10 Computer Analog Input Connections-Ideal <\/td>\n<\/tr>\n
66<\/td>\nFig All Computer Analog Input Connections-CDF <\/td>\n<\/tr>\n
67<\/td>\nFig A12 Vibration Signals-Ideal <\/td>\n<\/tr>\n
68<\/td>\nFig A13 Vibration Signals-CDF <\/td>\n<\/tr>\n
69<\/td>\nFig A14 Thermocouples-Ideal <\/td>\n<\/tr>\n
70<\/td>\nFig A15 Thermocouples-CDF <\/td>\n<\/tr>\n
71<\/td>\nRTD\u2122s-Ideal <\/td>\n<\/tr>\n
72<\/td>\nRTD\u2122s-CDF <\/td>\n<\/tr>\n
73<\/td>\nFig A18 Ungrounded RTD\u2122s-Ideal <\/td>\n<\/tr>\n
74<\/td>\nFig A19 Ungrounded RTD\u2122s-CDF <\/td>\n<\/tr>\n
75<\/td>\nFig A20 Core Detector-Ideal <\/td>\n<\/tr>\n
76<\/td>\nFig A21 Core Detector-CDF <\/td>\n<\/tr>\n
77<\/td>\nFig A22 Ion Chamber-Ideal <\/td>\n<\/tr>\n
78<\/td>\nFig A23 Ion Chamber-CDF <\/td>\n<\/tr>\n
79<\/td>\nFig A24 Installation Methods for Packaged Systems-Ideal <\/td>\n<\/tr>\n
80<\/td>\nFig A25 Installation Methods for Packaged Systems-CDF <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

IEEE Guide for Instrumentation and Control Equipment Grounding in Generating Stations<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
IEEE<\/b><\/a><\/td>\n1989<\/td>\n81<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":79635,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2644],"product_tag":[],"class_list":{"0":"post-79634","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-ieee","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/79634","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/79635"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=79634"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=79634"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=79634"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}