The Zenith Controls K-1058 Voltage Sensing Relay is a 480V AC, 60 Hz voltage/phase monitoring relay designed for industrial power systems. It monitors voltage and phase conditions to protect equipment and initiate control actions in automatic transfer switches, backup generator installations, and power distribution panels. Key specs include MPN K-1058, weight about 0.97 lb, and status Discontinued by manufacturer from GE Zenith Controls. Common replacements include Zenith K-1188 (480V phase relay replacement series) and ARS-4 phase relay replacement assemblies.
