7SR45 Description of Operation
© 2017 Siemens Protection Devices Limited Chapter 1 Page 10 of 34
Section 2: Hardware Description
2.1 Operator Interface
Figure 2-1 LED Indication Label
The rating label is located on the housing and provides more technical information about the 7SR45 self powered
overcurrent and earth fault relay.
Relay Information
The rating label contains the following product Information:
• Product name
• MLFB ordering code, with hardware version suffix
• Nominal current (In) rating
• Rated frequency
• Binary input supply rating
• Serial number
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