The 7SR51 overcurrent feeder protection relay includes a wide range of protection functions and IEC 61850 Ethernet communications as standard. To further minimize the product variants the power supply and the binary inputs cover the full operating range with configurable binary input thresholds. The large LCD, tactile pushbuttons and programmable LEDs provide a user-friendly product interface and the relay element is withdrawable for easy replacement. Housed in a 4U high, size E6 or E12 cases, depending on required IO, these relays provide protection, monitoring, instrumentation and metering with integrated input and output logic, data logging & fault reports. Communication access to the relay functionality using Reydisp Manager software is via a front USB port for local PC connection as well as a rear electrical RS485 port & two Ethernet ports (Electrical or Optical).