General considerations for grounding synchronous generator systems are summarized, focusing on the objectives of generator grounding. The factors to be considered in the selection of a grounding class and the application of grounding methods are discussed. Four generator grounding types are considered: unit-connected generation systems, common-bus generators without feeders, generators with feeders directly connected at generated voltage, and three-phase, 4-wire connected generators.
- Sponsor Committee
- PE/SPDC - Surge Protective Devices Committee
Learn More About PE/SPDC - Surge Protective Devices Committee - Status
- Superseded Standard
- Superseded by
- C62.92.2-2017
- Board Approval
- 1989-02-02
- History
-
- ANSI Approved:
- 1989-10-13
- ANSI Withdrawn Date:
- 2016-08-19
- Published:
- 1989-09-29
- Reaffirmed:
- 2005-06-09
Working Group Details
- Society
- IEEE Power and Energy Society
Learn More About IEEE Power and Energy Society - Sponsor Committee
- PE/SPDC - Surge Protective Devices Committee
Learn More About PE/SPDC - Surge Protective Devices Committee - Working Group
-
HV3.5.7 - 3.5.7 App Guide for Neutral Grounding in Elec Utility Systems WG
- IEEE Program Manager
- Christian Orlando
Contact Christian Orlando - Working Group Chair
- Steven Whisenant
Other Activities From This Working Group
Current projects that have been authorized by the IEEE SA Standards Board to develop a standard.
PC62.92.3
Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part III -Generator Auxiliary Systems
This guide summarizes the general considerations in neutral grounding of electrical utility generating station auxiliary power systems. It discusses the factors to be considered in selecting between the appropriate grounding classes and specifying equipment ratings. This guide applies to both medium-voltage (1 kV to15 kV) and low-voltage (less than 1 kV) auxiliary power systems. The intent of this guide is to discuss grounding methods which may be used to limit equipment damage by limiting excessive fault currents and system overvoltages during ground faults. The emphasis is on reliability and availability of auxiliary power system service, achieved through control of ground-fault currents and transient overvoltages. This guide is specifically written for electrical utility systems and does not consider the neutral grounding requirements for dispersed storage and generation. These requirements must take into consideration the restrictions imposed by the specific network to which the dispersed storage or generation is connected. However, neutral grounding of dispersed storage and generation needs to be coordinated with the electrical utility system.
PC62.92.4
IEEE Draft Guide for the Application of Neutral Grounding in Electrical Utility Systems--Part IV: Distribution
The neutral grounding of single- and three-phase ac electric-utility primary distribution systems with nominal voltages in the range of 2.4 kV – 34.5 kV is addressed. Classes of distribution-systems grounding are defined. Basic considerations in distribution-system grounding concerning economics, control of temporary over voltages, control of ground-fault currents, and ground relaying are addressed. Also considered is the use of grounding transformers, grounding of high-voltage neutral of wye-delta distribution transformers, and interconnection of primary and secondary neutrals of distribution transformers.
PC62.92.6
Guide for Application of Neutral Grounding in Electrical Utility Systems, Part VI--Systems Supplied by Current-Regulated Sources
This guide applies to three-phase electrical utility systems and is Part VI of the IEEE C62.92(TM) series. This part provides definitions and considerations related to system grounding where the dominant sources of system energization are current-regulated or power-regulated power conversion devices.
Standards approved by the IEEE SA Standards Board that are within the 10-year lifecycle.
C62.92.1-2016
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems--Part I: Introduction
The application of neutral grounding to three-phase electrical utility systems is described in this guide. It is Part 1 of the IEEE C62.92 series of guides for neutral grounding. This guide presents basic considerations of the selection of neutral grounding parameters that will provide for the control of overvoltage and ground-fault current on all parts of three-phase electrical utility systems rated greater than 1000 V.
C62.92.2-2017
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part II--Synchronous Generator Systems
The basic factors and general considerations in selecting the class and means of neutral grounding for synchronous generator systems connected to electrical utility systems are provided in this guide. It also provides the suggested methods and apparatus to be used to achieve the desired grounding. These guidelines apply to both large and small generators found in electrical utility systems. Definitions of grounding terms used in this the guide can be found in IEEE Std C62.92.1(TM)-2000.
C62.92.4-2014
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems--Part IV: Distribution
The neutral grounding of single- and three-phase ac electric-utility primary distribution systems with nominal voltages in the range of 2.4 kV - 34.5 kV is addressed. Classes of distribution-systems grounding are defined. Basic considerations in distribution-system grounding concerning economics, control of temporary overvoltages, control of ground-fault currents, and ground relaying are addressed. Also considered is the use of grounding transformers, grounding of high-voltage neutral of wye-delta distribution transformers, and interconnection of primary and secondary neutrals of distribution transformers.
C62.92.5-2020
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems--Part V: Transmission Systems and Subtransmission Systems
Basic factors and general considerations in selecting the class and means of neutral grounding for a particular ac transmission or subtransmission system are covered in this guide. An apparatus to be used to achieve the desired grounding is suggested, and methods for specifying the grounding devices are given. Transformer tertiary systems, equipment-neutral grounding, and the effects of series compensation on grounding are discussed.
C62.92.6-2017
IEEE Guide for Application of Neutral Grounding in Electrical Utility Systems, Part VI--Systems Supplied by Current-Regulated Sources
Applications to three-phase electrical utility systems are described in this Part VI of the IEEE C62.92™ series. Definitions and considerations related to system grounding where the dominant sources of system energization are current-regulated or power-regulated power conversion devices are provided.
These standards have been replaced with a revised version of the standard, or by a compilation of the original active standard and all its existing amendments, corrigenda, and errata.
C62.92-1987
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part 1 - Introduction
Some basic considerations for the selection of neutral grounding parameters that will provide for the control of ground-fault current and overvoltage on all portions of three-phase electrical utility systems are presented. These considerations apply specifically to electric utility systems and do not recognize the neutral grounding requirements for dispersed storage and generation. They are intended to serve as an introduction to a series of standards on neutral grounding in electrical utility systems.
C62.92.1-2000
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part 1 - Introduction
This guide is the introduction to the C62.92 series of five IEEE guides on neutral grounding in three-phase electrical utility systems. It provides system grounding definitions and considerations that are general to all types of electrical utility systems.
C62.92.3-1993
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part III - Generator Auxiliary Systems
Basic factors and general considerations in selecting the class and means of neutral grounding for electrical generating plant auxiliary power systems are given in this guide. Apparatus to be used to achieve the desired grounding are suggested, and methods to specify the grounding devices are given. Sensitivity and selectivity of equipment ground-fault protection as affected by selection of the neutral grounding device are discussed, with examples.
C62.92.4-1991
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part IV-Distribution
The neutral grounding of single- and three-phase ac electric utility primary distribution systems with nominal voltages in the range of 2.4 - 34.5 kV is addressed. Classes of distribution systems grounding are defined. Basic considerations in distribution system grounding--concerning economics, control of temporary overvoltages, control of ground-fault currents, and ground relaying--are addressed. Also considered are use of grounding transformers, grounding of high-voltage neutral of wye/delta distribution transformers, and interconnection of primary and secondary neutrals of distribution transformers.
C62.92.5-2000
IEEE Guide for the Application of Neutral Grounding in Electric Utility Systems, Part V - Transmission Systems and Subtransmission Systems
Basic factors and general considerations in selecting the class and means of neutral grounding for a particular ac transmission or subtransmission system are covered. An apparatus to be used to achieve the desired grounding is suggested, and methods for specifying the grounding devices are given. Transformer tertiary systems, equipment-neutral grounding, and the effects of series compensation on grounding are discussed.
C62.92.5-2009
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part V-Transmission Systems and Subtransmission Systems
Basic factors and general considerations in selecting the class and means of neutral grounding for a particular ac transmission or sub transmission system are covered. An apparatus to be used to achieve the desired grounding is suggested, and methods for specifying the grounding devices are given. Transformer tertiary systems, equipment-neutral grounding, and the effects of series compensation on grounding are discussed.
These standards have been removed from active status through a ballot where the standard is made inactive as a consensus decision of a balloting group.
No Inactive-Withdrawn Standards
These standards are removed from active status through an administrative process for standards that have not undergone a revision process within 10 years.
C62.92.3-2012
IEEE Guide for the Application of Neutral Grounding in Electrical Utility Systems, Part III -Generator Auxiliary Systems
Basic factors and general considerations in selecting the class and means of neutral grounding for electrical generating plant auxiliary power systems are given in this guide. Apparatus to be used to achieve the desired grounding are suggested, and methods to specify the grounding devices are given. Sensitivity and selectivity of equipment ground-fault protection as affected by selection of the neutral grounding device are discussed, with examples.