7SR45 Description of Operation
© 2017 Siemens Protection Devices Limited Chapter 1 Page 12 of 34
2.1.2 Keypad
7SR45 self powered overcurrent and earth fault relay keypad consists of 5 standard keys for navigation and
editing the values. The standard keys are used to navigate the menu structure and control the relay functions.
The 2 additional keys are available for LCD backlight and battery mode.
The keys are used for the following functions:
• To display and edit the relay settings
• To display the relay instrumentation and fault data
• To reset the output relays and LEDs
Used for navigating to sub menu or to increase the parameter value in the edit mode.
Used for navigating to sub menu or to decrease the parameter value in the edit mode.
Used for clearing the fault flags. By using this key, the user can acknowledge the LEDs and
binary output status. This key is also used for selecting the sub menu or selecting
parameter values in the edit mode.
Used for selecting parameter or confirming the values.
The ENTER key is used to initiate and accept the setting changes.
Press ENTER to edit the parameter setting. The setting value flashes and can be changed
by using the▲ or ▼ keys.
Used for navigating to previous menu or to discard the value.
The CANCEL key is used to return the relay to its initial status or one level above in the
menu structure.
Press CANCEL key repeatedly to return to the Relay Identifier screen.
Used to switch-on and switch-off the relay with battery power when USB and CT power are
not available.
Used to switch-on and switch-off the backlight.
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