ATC Diversified Electronics VBA-230-AFN Voltage Monitor

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ATC Diversified Electronics VBA-230-AFN is part of the VBA series family of voltage monitors.  The VBA series features single phase monitoring relays designed to monitor supply voltage for a preselected under and over voltage limit.  With normal operating voltage applied, the internal relay will energize (or pick up).  When the voltage falls outside the preset over/under trip points for longer than release delay, the relay will de-energize (or drop out). The hysteresis feature in each unit on the under/over limits provides a differential between the pick up and drop out trip points.