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Topic:Kt Kingtronics Surge Arresters Protective Gaps
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Protective gaps are auxiliary devices which serve two purposes: (1) they isolate electrical equipment during normal service conditions, and (2) they provide a path to ground for surge current during arrester operations. Protective gaps used for interconnection of arrester ground, secondary neutral, and transformer tank provide additional protection to distribution transformers and improve continuity of service to customers. Protective gaps provide effective and inexpensive surge protection for the primary neutral of a system (grounded only at the substation) if the potential of the primary neutral is less than 350 volts (rms) above ground. Transformer tanks can be isolated from ground under normal conditions by connecting the transformer to ground through a protective gap.
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