High Resistance Grounding—Avoiding …

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MURRAY et al.: HIGH RESISTANCE GROUNDING—AVOIDING UNNECESSARY PITFALLS 1147 Fig. 1. TVSS for solidly grounded system. TABLE I TYPICAL MCOV RATINGS FORTHREE-PHASE FOUR-WIRE SYSTEMS II. APPLICATIONPITFALLS TOAVOID A. TVSSs In the late 1990s, a TVSS ruptured in a new 600-V switch-board at a data center in southern Ontario, Canada.

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