Abstract: A method for horizontal assembly of a high-voltage feed-through bushing includes vertically-assembling a field shaper assembly of a high-voltage feed-through bushing on a field shaper fixture. The field shaper assembly is then rotated within the field shaper fixture such that the field shaper assembly is oriented on a horizontal axis. Next, an insulator tube fixture supporting an insulator tube assembly is positioned adjacent to the field shaper fixture. The insulator tube assembly, being oriented on the same horizontal axis as the field shaper assembly, is then affixed to field shaper assembly.

Abstract: A method for horizontal assembly of a high-voltage feed-through bushing includes vertically-assembling a field shaper assembly of a high-voltage feed-through bushing on a field shaper fixture. The field shaper assembly is then rotated within the field shaper fixture such that the field shaper assembly is oriented on a horizontal axis. Next, an insulator tube fixture supporting an insulator tube assembly is positioned adjacent to the field shaper fixture. The insulator tube assembly, being oriented on the same horizontal axis as the field shaper assembly, is then affixed to field shaper assembly.

Abstract: A high-voltage (HV) bushing that comprises first and second sections, at least two internal grading elements, and at least two external grading elements. The first and second sections each have a HV end and a grounded end. The exterior of the first section is configured to be exposed to open air. One internal grading element is mounted to the HV end of the first section and another internal grading element is mounted to the grounded end of the first section. One of the external grading elements is mounted to the HV end of the first section and another external grading element is coupled to the grounded end of the first section. The internal grading elements and the external grading elements are each configured to moderate an electric field along the inner and outer surfaces of the HV bushing near the HV end and the grounded end of the first section.

Abstract: A method for horizontal assembly of a high-voltage feed-through bushing includes vertically-assembling a field shaper assembly of a high-voltage feed-through bushing on a field shaper fixture. The field shaper assembly is then rotated within the field shaper fixture such that the field shaper assembly is oriented on a horizontal axis. Next, an insulator tube fixture supporting an insulator tube assembly is positioned adjacent to the field shaper fixture. The insulator tube assembly, being oriented on the same horizontal axis as the field shaper assembly, is then affixed to field shaper assembly.

Abstract: A method for making transmission measurements in a dual-chambered anechoic chamber used in conjunction with spatial averaging. At selected transmitter antenna positions, measurement are taken at different frequencies. For each transmitter position, a measurement is made with the test device positioned between the apertures, and another without the test device. When all desired measurements have been made, the measurement data are spatially averaged; i.e., the measurements are scaled, summed, and averaged, providing more accurate transmission measurements.

Abstract: A dual-chambered anechoic chamber used in conjunction with spatial averaging for making transmission measurements of electromagnetic devices. The anechoic chamber includes a first tapered chamber with a first aperture, a second tapered chamber with a second aperture opposed to the first aperture, an alignment apparatus for aligning the two chambers and, if necessary, for positioning a test device between the apertures, and a positioning mechanism for mounting and determining the position of a transmitter antenna. A receiver antenna in the second chamber receives test signals transmitted from the transmitter antenna. At selected transmitter antenna positions, measurements are taken at different frequencies. For each transmitter position, a measurement is made with the test device positioned between the apertures, and another without the test device. When all desired measurements have been made, the measurement data are spatially averaged; i.e.