Superseded by IEEE Std C57.13.3-2005 General and specific recommendations for grounding current and voltage transformer secondary circuits and cases of connected equipment are provided. The practices recommended apply to all transformers of this type, including capacitive voltage transformers and linear couplers, irrespective of primary voltage or whether the primary windings are connected to, or are in, power circuits or are connected in the secondary circuits of other transformers as auxiliary current or voltage transformers. The primary emphasis is personnel safety and proper performance of relays at power-line frequencies. The grounding and shielding of cables and other grounding considerations are not addressed.
- Standard Committee
- PE/PSRCC - Power System Relaying and Control
- Status
- Superseded Standard
- Superseded by
- C57.13.3-2005
- Board Approval
- 1983-09-22
- History
-
- ANSI Approved:
- 1991-05-21
- Published:
- 1988-04-01
- Reaffirmed:
- 1990-12-06
Working Group Details
- Society
- IEEE Power and Energy Society
- Standard Committee
- PE/PSRCC - Power System Relaying and Control
Other Activities From This Working Group
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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.
C57.13.3-2005
IEEE Guide for Grounding of Instrument Transformer Secondary Circuits and Cases
The practices described in this guide apply to all instrument transformers, including capacitive voltage transformers (VTs) and linear couplers, irrespective of primary voltage or whether the primary windings are connected to, or are in, power circuits or are connected in the secondary circuits of other transformers as auxiliary current transformers (CTs) or VTs. This guide does not discuss the grounding of some applications. For example, grounding of gas insulated substations and metal clad switchgear is not discussed in this guide; the reader will find these topics addressed in IEEE Std 242. The grounding of circuits of core-balance CTs is also not discussed in this guide. The reader can also find this information in IEEE Std 242. Another issue that is not discussed in this guide is the practice of using separate safety and control grounds. For discussion on this topic, the reader is directed to IEEE Std 665.
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