The EMRI EVA voltage regulator is a replacement regulator for the EME R280/290, Ti7.5D, R260/274, R260/261 voltage regulators. The EVA is also applicable on any generator in which auxiliary windings are used, if the excitation current and voltage is within specification. The EMRI EVA mode of control is constant voltage. If Volt-per-Hertz is required, we recommend the EMRI LX4.