7SR45 Description of Operation
© 2017 Siemens Protection Devices Limited Chapter 1 Page 8 of 34
Use the following ordering information to order 7SR45 self powered overcurrent and earth fault relay battery
spares.
Table 1-1 Battery Spares Ordering Options
NOTE:
If possible, it is recommended to procure the battery as per the Table 1-1 from the local supplier or local market.
1.5 Functional Diagram
Figure 1-1 Functional Diagram of 7SR45 Self Powered Overcurrent and Earth Fault Relay
Variants Description
7XG1900-1AA00-1000 Main Battery CR123A
7XG1900-2AA00-1000 RTC Battery CR1632
7XG1900-3AA00-1000 Main Battery CR123A + RTC Battery CR1632
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