IEEE DRAFT C57.13.3 : D9 2005
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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GUIDE FOR GROUNDING OF INSTRUMENT TRANSFORMER SECONDARY CIRCUITS AND CASES
05-08-2006
01-12-2013
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Superseded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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