Siemens 7SR45 Argus User Manual

7SR45 Description of Operation
© 2017 Siemens Protection Devices Limited Chapter 1 Page 13 of 34
2.1.3 Light Emitting Diode (LED)
2.1.3.1 Indication
7SR45 self powered overcurrent and earth fault relay consists of 9 fixed function LEDs. LED indicates the
parameter status of the relay such as TRIP READY and PICKUP. The pre-defined LED functions are:
LEDs LED Functions Color
LED 1
PROT. HEALTHY GREEN
LED 2
PICKUP ON AMBER
LED 3
TRIP RED
LED 4
IL1 / A RED
LED 5
IL2 / B RED
LED 6
IL3 / C RED
LED 7
IE / E RED
LED 8
TRIP READY GREEN
LED 9
LOW BATTERY AMBER
2.1.3.2 Protection Healthy LED
The steady illumination of Protection Healthy LED indicates that required CT current is 0.20xIn (minimum phase
current) in single phase or 0.13xIn (minimum phase current) in three phases.
2.1.3.3 Trip Ready LED
The steady illumination of Trip Ready LED indicates that required CT current is 0.20xIn (minimum phase current)
in single phase or 0.13xIn (minimum phase current) in three phases and the relay is having sufficient energy to
trip through the impulse output.
2.2 Home Screen
After the relay is powered on, the user can access or navigate to other menus from the Home Screen.
The following operations can be performed from the Home Screen:
ENTER Press ENTER key to navigate to SETTING MODE
READ UP Press READ UP key to navigate to MAINTENANCE MODE
READ DOWN Press READ DOWN key to navigate to SETTING MODE
TEST/RESET► Press TEST/RESET► key to reset flag and LED
CANCEL+TEST/RESET► Press CANCEL+TEST/RESET► key to navigate to SOFTWARE VERSION
2.3 Password Protection
7SR45 self powered overcurrent and earth fault relay allow the user to set the password via SETTING MODE >
SYSTEM CONFIG > PASSWORD. The length of the password should be 4 characters. Alphanumeric and
3 special characters such as “+”, “–“, and “/” are allowed.
The user password can be disabled by configuring as NONE.
From the parameter view screen, the user enters the password and presses ENTER for validation. If the entered
password is valid, the next screen appears. If the password is invalid, LCD displays the password retry screen
again.
After the successful login and editing of parameter, password prompt screen does not appear till the login expires.
If the user does not perform any operation for more than 1 minute, the login expires and unsaved settings will be
discarded.

Siemens 7SR45 Argus Specifications

General

Brand	Siemens
Model	7SR45 Argus
Category	Relays
Language	English