Catalogue User Manual Numerical Over Current and Earth Fault Relay Model No : PNA442AR Features : Programmable 1A/5A rated CT input. Three phase over current and earth fault protection Draw out with self-CT shorting. Three phase instantaneous over current protection. Earth overcurrent instantaneous Negative phase sequence protection Protection against broken conductor Trip circuit supervision Harmonic restraint Circuit breaker failure detection Programmable Auto enclosure Fault recording Event recording Programmable matrix for -DO (Digital Out Put) and DI (Digital Input) Relay latching /Non latching (pulsed) -option. Protection blocking Communication - local (USB) and Remote(RS-485) Specification Prok Devices Pvt ltd Make Numerical overcurrent and earth fault relay offers a compact multifunctional protection relay for Feeder, Motor and Transformers. It is a non-directional relay with IDMT (Inverse Definite Minimum Time), Definite time(DMT) and Instantaneous Trip time characteristics in single unit. Relay has been designed for protecting, controlling and monitoring distribution networks and substations. They can be used as a part of protection scheme for feeder, transformers and generators.