1000W Ferroresonant Power Supply Series PRR Kepco power

Kepco's PRR are 1000 Watt rack mounted laboratory systems power supplies that offer the low cost and very high dependability of ferroresonant voltage stabilization. The ferroresonant stabilizing technique provides extraordinary isolation from a wide variety of source noise.

It is inherently short-circuit proof and cannot expose delicate loads to overvoltage hazards. Hence no crowbar, fuses, or bounding circuits are needed. Ferroresonant power supplies use no noise-producing switches or oscillators. Voltage setting is independent of delicate control settings or diode references and requires no comparators, references, or limiters. Efficiency is 70-80%.
PRR models optimized for railroad applications are identified by the -rr suffix. These models include the power OK relay, railroad output studs, and an input barrier strip.