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IEEE DRAFT C57.13.3 : D9 2005

Superseded

Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by

GUIDE FOR GROUNDING OF INSTRUMENT TRANSFORMER SECONDARY CIRCUITS AND CASES

Superseded date

08-05-2006

Superseded by

IEEE C57.13.3-2014

Published date

12-01-2013

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Introduction
1. Overview
   1.1 Scope
   1.2 Purpose
2. References
3. Definitions
4. Need for Grounding Secondary Circuits of Instrument
   Transformers and Cases
5. Grounding of Instrument Transformer Secondary Circuits
   5.1 Background
   5.2 Ground Connection to only One Point in the Secondary Circuit
   4.3 Recommended Point of Grounding
   5.4 Location of Connection to Ground
       5.4.1 Unused secondary windings of instrument transformers
   5.5 Minimum Size of Conductor for Ground Connection
   5.6 Ground Connection Isolation Test Facilities
       5.6.1 VT Secondary Circuits
       5.6.2 CT Secondary Circuits
6. Grounding of Instrument Transformer Cases and Cases of Connected
   Equipment
   6.1 Metallic or Conductive Case Grounding
   6.2 Internal Conductive Parts - Insulated Cases
   6.3 Ungrounded Metallic or Conductive Cases
7. Exceptions to Grounding
8. Grounding of Low-Energy Transducers
   8.1 Interconnection Wiring Practices
Annex A (informative) Issues to consider for shielded cable
                      applications for instrument transformers
   A.1 CTs installed over shielded cables, metal bushing collars
       or conduits
Annex B (informative) IEEE Standards Reviewed by the WG
Annex C (informative) Article 90.2 Scope of NFPA 70, National
                      Electrical Code [1]
Annex D (informative) Survey of Grounding Practices
Annex E (informative) Bibliography

Includes the grounding practices presently used and the practices that were not previously reported. It provides information on the grounding of: - secondary circuits of electromagnetic current transformer (CT) and voltage transformer (VT) circuits, - cases of relays, CTs and VTs and, - secondary circuits of opto-electronic CTs and VTs.

DocumentType
Draft
PublisherName
Institute of Electrical & Electronics Engineers
Status
Superseded
SupersededBy

IEEE 525-2007 IEEE Guide for the Design and Installation of Cable Systems in Substations
IEEE 242-2001 IEEE Recommended Practice for Protection and Coordination of Industrial and Commercial Power Systems (IEEE Buff Book)
IEEE 80-2013 REDLINE IEEE Guide for Safety in AC Substation Grounding
IEEE C2-2017 NATIONAL ELECTRICAL SAFETY CODE (NESC)(R)
IEEE 142 : 2007 GROUNDING OF INDUSTRIAL AND COMMERCIAL POWER SYSTEMS
NFPA 70 : 2017 NATIONAL ELECTRICAL CODE
IEEE 1100 : 2005 POWERING AND GROUNDING ELECTRONIC EQUIPMENT
IEEE C37.103-2015 IEEE Guide for Differential and Polarizing Relay Circuit Testing
IEEE 1143-2012 IEEE Guide on Shielding Practice for Low Voltage Cables
IEEE C57.131-2012 IEEE Standard Requirements for Tap Changers

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