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Patent

Flexible snake-like string of components encased in tubular sheath immersed in oil

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TLDR
In this article, a modular, flexible snake-like electrical device containing a plurality of series-connected rectifier cartridges positioned end-to-end, or similar components, enclosed within a plastic sheath enables connection with substantially uniform voltage stress distribution between a low voltage and a high voltage terminal by conveniently arranging the device in a helical or snakelike path.
Abstract
A high voltage accelerator power supply for providing a substantial current flow at a high D.C. voltage level including a step-up transformer mounted on an upright insulating frame at an intermediate level approximately midway between bottom and top of the power supply with the transformer being horizontally positioned and corona rings encircling the upper and lower edges of its core. One capacitor is below the level of the transformer core and another is above that level in a voltage-doubling arrangement while the core is electrically connected to a junction intermediate the two capacitors to be at an intermediate voltage level. A modular, flexible snake-like electrical device containing a plurality of series-connected rectifier cartridges positioned end-to-end, or similar components, enclosed within a plastic sheath enables connection with substantially uniform voltage stress distribution between a low voltage and a high voltage terminal by conveniently arranging the device in a helical or snake-like path. An isolation transformer system includes first and second widely separated cores one at ground potential and the other at the high D.C. output voltage of the supply, with an endless loop coupling winding at intermediate D.C. level and encased in a heavy insulation covering wound a few turns on each core.

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Patent

Very low frequency high voltage sinusoidal electrical testing method, systems and apparatus

TL;DR: Very low frequency (VLF) high voltage (HV) sinusoidal electrical test waves are suitable for testing characteristics and/or qualities of insulation on long, buried electric power cables as mentioned in this paper.
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Insulation system and method for a transformer

TL;DR: In this paper, a transformer including a magnetic core is described, which consists of multiple laminate stacks having at least one opening, surrounded by an insulating layer having a dielectric constant that varies as a function of voltage.
References
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Patent

High-voltage thyristor equipment

TL;DR: In this article, a plurality of thyristors and their associated circuitry are mounted on a number of tubular cooling ducts 16 upstanding from and equidistantly spaced around an annular receptacle 11 for cooling fluid, so that the complete assembly of a thyristor defines a helical path encircling all the ducts.
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High-voltage resistor

TL;DR: In this paper, a corona-resistant means for housing high voltage resistors of the so-called pyrolytic type was proposed, which is a type of resistor that is more suitable for high voltage applications.