New Current Transformer for Bus Differential Proteection
- 1 December 1941
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Transactions of the American Institute of Electrical Engineers
- Vol. 60 (12) , 1180-1187
- https://doi.org/10.1109/T-AIEE.1941.5058250
Abstract
Perfect current transformers would make all differential relaying simple, but such transformers would be of excessive size and cost. A new idea in current transformer design makes it possible to maintain a linear relation between primary and secondary currents in a transformer and reasonable size, even where high current values, completely offset, are encountered. Such a current transformer is particularly valuable for applications where high speed bus differentical protection is required. The basic principles of design and test results are reviewed showing that the air gap core current transformer retains a fixed ratio over the full range of current for which it is designed. There is thus made available a current transformer of reasonable size, which may be easily applied and may be used with simple relays.Keywords
This publication has 2 references indexed in Scilit:
- Current Transformers and Relays for High-Speed Differential Protection, With Particular Reference to Offset Transient CurrentsTransactions of the American Institute of Electrical Engineers, 1940
- Harmonic-Current-Restrained Relays for Differential ProtectionTransactions of the American Institute of Electrical Engineers, 1938