This new advanced protection system includes industry's first cost-effective implementation of bus differential (ANSI 87B) on low-voltage switchgear. The bus differential provides a true zone-based protection that detects faults that range from less than the bus rating to the full short circuit rating of the equipment. This system, built by Entellisys, does this in minimum time and clears faults faster; it is 100-percent selective all of the time.

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