WORK EXECUTION METHOD OF REFERENCE ELECTRODE FOR GROUNDING ACCIDENT DECISION, AND REFERENCE ELECTRODE FOR GROUNDING ACCIDENT DECISION

摘要

PROBLEM TO BE SOLVED: To provide an enforcing method of a reference electrode capable of judging whether or not a grounding accident of a buried electric wire is generated in a substrate premise and a reference electrode therefor. SOLUTION: A predetermined current flows between an electrode installed at a position far from a substation and an earth mat buried in the substation premise and a potential distribution at each point of the substation premise is measured to set a standard electrode-providing position. Next, a tip end electrode 3a is hit in the standard electrode-providing position and a providing depth is subsequently increased while adding a step earth 3b. The step earth 3b is covered with an insulation cylinder (shield) 3e formed by a vinyl chloride resin, etc. When a target potential difference is ensured between the earth mat and the reference electrode, an insulation material 3f is poured between the step earth 3b and the insulation cylinder 3e and a water-proof cap 3g is covered on an upper end. An electrode previously coated by an insulation material can be also used as the standard electrode.