Abstract
An inductive current-limiting device based on transition of a superconductor to the normal state is investigated. The device has low impedance under normal conditions of the circuit to be protected, and a high impedance developed rapidly in a self-switching mode under fault conditions. A model of the device consisting of a copper coil and a high-temperature superconducting ring, coupled magnetically, was tested. It is shown that the transition of the ring to the normal state and its return to the superconducting state take place in a relatively smooth manner, and does not lead to overvoltages across circuit elements. On the other hand, the rate of impedance rise is sufficient to limit both the steady-state and transient components of fault current. The influence of thermal processes in the ring on transient responses in the circuit with the CLD is discussed. Some considerations for a full size design are also presented.
Original language | English |
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Pages (from-to) | 3033-3036 |
Number of pages | 4 |
Journal | IEEE Transactions on Applied Superconductivity |
Volume | 3 |
Issue number | 3 |
DOIs | |
State | Published - 1 Jan 1993 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Electrical and Electronic Engineering