Transcription of Current Transformer Grounding - Powell Industries, Inc.
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Current Transformer Grounding - Powell Industries, Inc.
Current Transformer Grounding Powell Industries, Inc. PO Box 12818 Houston, TX 77217 2005 Powell Industries, Inc. All rights reserved. Tel: Fax: May 12, 2000 With the new PowlVac-AT Model ATSB outdoor substation circuit breakers recently introduced by Powell Electrical Manufacturing Company, several questions should be addressed regarding the ground point for the Current Transformer (CT) circuits. This Powell Technical Brief investigates the preferred ground location of typical CT circuits such as Transformer and bus differential relays. IEEE standard serves as the ANSI guide to standardize instrument Transformer Grounding practices. The Grounding of Current transformers is important to both safety and the proper operation of the protective relays. To assure the safe and reliable operation, the neutral of the Current Transformer secondary should have a single ground location for each circuit.
Current Transformer Grounding Powell Industries, Inc. PO Box 12818 Houston, TX • 77217 ©2005 Powell Industries, Inc. • All rights reserved.
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