Siemens Reyrolle 7SR45 Argus Device Manual page 13

General Properties
•
CT powered with option for an external auxiliary supply connection
•
Dedicated switch-on-to-fault (SOTF) protection
•
Self-monitoring – Including battery condition monitor
•
High sensitivity – Trip ready at 20 % of I
•
Intelligent power management – Fail-safe startup and shut down modes
•
Removable lithium battery backup for viewing fault data, setting the protection, and resetting of indica-
tions
•
2 case options for mounting in various size RMUs
•
Front Fascia with 5 non-programmable LEDs and 4 user programmable LEDs
•
Mechanical flag for trip indication
Communication Protocols Supported
•
IEC 60870-5-103
•
Modbus RTU
Device Functionality Overview
The 7SR45 Argus relay includes protection and supervision functions. The relay provides both definite-time
and inverse-time overcurrent and earth fault protection functions. The relay is CT powered with an option for
connection to an external auxiliary supply.
The relay functionality can be configured via a front USB port for local PC connection or rear electrical RS485
(optional) port for remote connection. By using the Reydisp Evolution software, the user can update the
settings and view the fault records (trip log) and the event records (event log).
The relay supports the IEC 60870-5-103 and MODBUS‑RTU communication protocols which helps in estab-
lishing connection to SCADA. The relay can indicate the trip with local and remote flag indicator based on the
ordering options.
Main function
Inputs and outputs
Communication
Housing
Reyrolle, 7SR45, Device Manual
C53000-G7040-C101-2, Edition 09.2020
(1-phase) and 10 % of I
rated
Overcurrent and Earth-Fault Protection
4 current transformers with
•
1 A or 5 A inputs
•
2 or 4 binary inputs
•
2 or 4 binary outputs
•
Pulse output
•
Local/remote flag indicator
Front USB port (for configuration via Reydisp Evolution) and rear RS485 port
(optional)
Size 4 – non draw‑out case with mounting options available in standard 4U rack
height or height-reduced side-mounting arrangement
1.1 7SR45 Overcurrent and Earth Fault Relay Overview
(3-phase)
rated
Introduction
13