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Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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