The protective voltage relays types RMV-112D, RMV-122D and RMV-132D form part of a complete DEIF series of relays for protection and control of generators and are applicable to both marine and land-based installations. Also available are voltage relays for single phase measurement (RMV-142D). The voltage relays are applied for protection of generators, motors and transformers against adverse system voltage conditions. The relay supervises all 3-phase voltages. The following types are available: - Type RMV-112D (ANSI codes 27/59) under-voltage and over-voltage relay (U< + U>) - Type RMV-122D (ANSI code 59) over-voltage relay (2 levels: U> + U>) - Type RMV-132D (ANSI code 27) under-voltage relay (2 levels: U< + U<) The RMV-142D is a combined under-voltage and over-voltage relay (U< + U>) and is applied for protection of generators, motors and transformers against adverse system voltage conditions. Borna Niroo Karan (Bornika) is the exclusive agent of DEIF in the fields of consultation , sales and distribution of power industry products including Voltage relay products .