The Terasaki ESV-1 is a stabilized voltage relay designed for marine power distribution systems. It monitors input voltages (110V, 445V, 450V) and provides over/undervoltage protection with adjustable set points (60-100%) and reset width (14-40). Powered by DC 24V, it features relay contacts (a/COM/b) for alarm or trip signals. Manufactured by Terasaki Electric in Osaka, Japan, this unit is a critical component for shipboard power system safety monitoring.
