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Title: A Guarding Technique For Regions Containing Potential Gradients
Author: Karl F. Anderson
Source: 1998 Measurement Science Conference
Year Published: 1998
Abstract: Conventional guarding prevents regions containing a single electrical potential from exchanging electrical charge with the rest of the environment through imperfect insulation. A new guarding technique prevents electrical charge exchange from regions containing potential gradients. Conventional guards are shown to be a special case of guards for potential gradients. The gradient guard, charge channel and guard group versions of the technique are discussed. Experimental results demonstrate that a current-carrying conductor, having a significant IR drop and protected within a charge channel can have the same entry and exit current despite poor and varying insulation performance from the conductor to the environment.

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