HRI-R40 could set a large number of programming possibilities with frontal button and 3 digit digital display for visualising measuring and programming parameters. Insulation's resistance monitoring is carried out applying a measure's signalling between isolated network and earth . reducing problems caused by the presence of direct-current components on network (rectifiers),
HRI-R4OW version has same fundamental characteristics of previous model but it uses particular measuring technique , Actually presence in network of strong distortions with high harmonic .
Borna niroo karan company(Brnika) is the exclusive representative of Contrel on buying , selling, consulting services for automation systems and protective relays including Insulation monitoring Relais (HRI Series) .