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Sleep Mode
The 7SR46 Argus Relay goes into sleep mode when the auxiliary power/CT power, and USB power are not
available. When the relay is in sleep mode, you can access the LCD by pressing the BAT ON/OFF key. If there
is inactivity, the relay goes to the sleep mode after 60 s.
When the relay is powered using CT power and auxiliary power is not available, if any fault occurs in the
system and the phase CT currents are disconnected, the relay goes to the sleep mode automatically.
If the relay is powered on via USB power mode and the USB cable is removed, then the relay goes to the sleep
mode automatically.
NOTE
i
i
During the sleep mode, the 7SR46 Argus Relay has limited functionality.
Low Battery Status Indication
The LOW BATTERY LED indication is displayed when the battery voltage falls below the sufficient operating
voltage and an event is generated. In the low battery condition, the view/edit setting is only allowed.
In the low battery mode, the backlight does not turn on.
The LOW BATTERY indication can be mapped to a binary output and can be used for the remote signaling.
NOTE
i
i
Siemens recommends replacing the battery when the LOW BATTERY indication is displayed.
In the low battery mode, the following relay operations lead to insufficient operating voltage. The LCD
displays the INSUFFICIENT ENERGY message and the relay enters the sleep mode.
•
Turning on the backlight
•
Resetting the local flag
•
Binary outputs
•
LEDs
NOTE
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i
In the low battery condition, when editing the settings, if the battery voltage falls below 1.5 V, the relay
goes to the sleep mode and all the unsaved settings are discarded.
Reyrolle, Operating, Manual
C53000-B7040-C103-1, Edition 10.2022
In Service Operation
6.4 Power Options
59
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