Self Powered Relay for Overcurrent Protection

Reyrolle 7SR45 Argus

The 7SR45 numeric relay provides both definite time and inverse time overcurrent and earth fault protection functions. The relay is designed to ensure sensitivity with a minimum operate setting of 0.2 x In for Phase Overcurrent Protection. The compact non draw-out design provides front fascia navigation keys, LCD and front USB port for ease of use. The relay is powered by the current transformers and does not require connection to an auxillary supply. Configuration can be done from the fascia or via the free of charge Reydisp Evolution PC Software.

Functions

Protection Functions

• Instantaneous Overcurrent Protection (50)

• Instantaneous Derived Earth Fault (50N)

• Instantaneous Measured Earth Fault (50G)

• Time Delayed Overcurrent (51)

• Time Delayed Derived Earth Fault (51N)

• Time Delayed Measured Earth Fault (51G)

• Line Check / Switch On To Fault (SOTF)

• Inrush Restraint

Features

• Self Powered
  

• 10 Fault Records

• 100 Event Records

• Password Protection

• Self Monitoring

• Overcurrent Protection Functions (Instantaneous and Delayed)

• Relay Integration via Reydisp Evolution PC Software

• Sensitivity of 20% Nominal Current

Hardware

• 4 Current Transformer with 1A or 5A Inputs

• 2 Binary Inputs

• 2 Latched Binary Outputs, 1 changeover and 1 normally open

• 1 Pulsed Output

User Interface

• 16 Character x 2 Line Backlit LCD

• Menu Navigation Keys

• 9 Predetermined LED’s for Easy Use

• Front USB Interface