R-K Electronics— page 3

Reliable voltage and phase monitoring is a quiet but critical requirement in industrial power systems — and R-K Electronics has specialized in this narrow domain for over seven decades. Founded in 1949 and based in the United States, the company's portfolio centers on protection relays and voltage monitors spanning single-phase, three-phase, and AC/DC applications from 11 V to 600 VAC. Key product families include the DPM series of digital multi-range three-phase voltage monitors with LCD displays and programmable trip parameters, the PBO series combining phase-loss and brown-out detection in a single compact unit, and the SVM series of single-phase voltage relays with octal plug-in mounting.