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METHOD AND APPARATUS FOR DISCRIMINATING BETWEEN PHASE AND NEUTRAL CONDUCTORS OF A DEAD CABLE
METHOD AND APPARATUS FOR DISCRIMINATING BETWEEN PHASE AND NEUTRAL CONDUCTORS OF A DEAD CABLE
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机译:鉴别失效电缆中相导体和中性导体的方法和装置
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摘要
A method comprises the steps of: connecting a first conductor of the cable to an earth sheath thereof at a user location; connecting two conductors and the earth sheath of the cable at a discrimination location to an apparatus such that said two conductors form two limbs of a Wheatstone Bridge circuit (2); and identifying at 4 the polarity of any potential difference across the bridge. As shown the neutral conductor (having a resistance RN) is connected to an earthed sheath (RE) at a user location and identified at the discrimination location as the conductor having the lowest resistance to earth, the phase conductor (RP) being connected to earth via a user load (RL). IMAGE
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