Current limiting devices
First Claim
1. A current-limiting device for an alternating current system comprising for each phase at least two iron-cored saturable reactors each of three limbed, double-window configuration with an alternating current winding of that phase wound about its centre limb, there being provided at least one superconducting direct current bias winding of elongated closed-loop configuration, the loop extending substantially in one plane and having two substantially parallel sides, at least one air-gap magnetic core linking each superconducting bias winding and a screen of electrically-conductive material surrounding the bais winding to shield the bias winding against alternating magnetic flux, and the arrangement being such that one of the two parallel sides of the loop of each screened bias winding passes through aligned windows of two of the iron-cored saturable reactors which are spatially parallel to one another while the other of the parallel sides passes through the other windows of the said two reactors.
2 Assignments
0 Petitions
Accused Products
Abstract
A current-limiting device for an alternating current system has at least two iron-cored saturable reactors for each phase, each reactor core being of double-window configuration with an alternating current winding on the central limb, and a superconducting bias winding screened alternating magnetic flux is in the form of a loop with two parallel sides which pass through the two windows of at least two of the reactor cores. For a three phase system the three pairs of reactors may be on a single bias winding loop or each pair may have its own bias winding. In a preferred construction two bias winding loops each link three reactor cores and each phase includes one reactor from each of the bias windings.
15 Citations
6 Claims
- 1. A current-limiting device for an alternating current system comprising for each phase at least two iron-cored saturable reactors each of three limbed, double-window configuration with an alternating current winding of that phase wound about its centre limb, there being provided at least one superconducting direct current bias winding of elongated closed-loop configuration, the loop extending substantially in one plane and having two substantially parallel sides, at least one air-gap magnetic core linking each superconducting bias winding and a screen of electrically-conductive material surrounding the bais winding to shield the bias winding against alternating magnetic flux, and the arrangement being such that one of the two parallel sides of the loop of each screened bias winding passes through aligned windows of two of the iron-cored saturable reactors which are spatially parallel to one another while the other of the parallel sides passes through the other windows of the said two reactors.
Specification