Real Time Clock; Battery; Firmware Update - Siemens 7SR45 Argus User Manual

Self powered overcurrent and earth fault relay

Hide thumbs Also See for 7SR45 Argus:

Table of Contents

3.19 Real Time Clock

The time and date can be set either via the relay fascia using an appropriate command in the System Config

menu or using Reydisp software. When the relay is de-energized, time and date are maintained by CR1632, 3 V

140 mAh Li/MnO2 coin cell battery.

The relay can be synchronized to the nearest second or minute using the Reydisp software. The device can have

a drift of ±5 s/day.

The default date is set as 01/01/2014 to indicate that the date is not set. In the relay, only the hours and minutes

can be edited. When the user presses ENTER after editing the seconds, the seconds is set to zero and the clock

starts.

7SR45 self powered overcurrent and earth fault relay consists of CR123A, 3 V 1400 mAh. The battery is used to

energize the device when CT power/USB power is not available. The user can perform actions such as viewing

the fault records, setting change, and resetting the flags with battery power.

In 7SR45 self powered overcurrent and earth fault relay, firmware can be updated by performing the following

procedure:

Connect the relay to a local PC using a USB cable.

Run the valid executable file from the local PC.

The application detects the connected relay and updates the firmware.

If any failure occurs, a message appears automatically in the PC application.

After successful update, the relay restarts.

Do not disconnect the USB when the firmware update is in progress. If the firmware update is

terminated intermittently, it may corrupt the existing firmware in the relay and the relay may stop

from working.

7SR45 Description of Operation

Chapter 1 Page 34 of 34

Table of Contents

Show Quick Links

Table of Contents