Figure 2.5-4 7Sr22 With Function Keys & 3 + 8 Leds In E8 Case And Ethernet - Siemens Argus 7SR21 Technical Manual
Overcurrent relay
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7SR210 & 7SR220 Description of Operation
The fascia is an integral part of the relay. Handles are located at each side of the element to allow it to be
withdrawn from the relay case.
Figure 2.5-4
7SR22 with Function Keys & 3 + 8 LEDs in E8 Case and Ethernet Communication Interface
Relay Information
Above the LCD three labels are provided, these provide the following information: -
1) Product name and order code.
2) Nominal current rating, rated frequency, voltage rating, auxiliary dc supply rating, binary input supply
rating, configuration and serial number.
3) Blank label for user defined information.
A 'template' is available to allow users to create and print customised labels.
Liquid Crystal Display (LCD)
A 4-line by 20-character liquid crystal display indicates settings, instrumentation, fault data and control
commands.
To conserve power the display backlighting is extinguished when no buttons are pressed for a user defined
period. A setting within the "SYSTEM CONFIG" menu allows the timeout to be adjusted from 1 to 60 minutes and
"Off" (backlight permanently on). Pressing any key will re-activate the display.
The LCD contrast can be adjusted using a flat blade screwdriver to turn the screw located below the contrast
symbol
. Turning the screw clockwise increases the contrast, anti-clockwise reduces the contrast.
User defined indentifying text can be programmed into the relay using the System config/Relay Identifier
setting. The 'Relay Identifier' text is displayed on the LCD display at the top level of the menu structure and is
used in communication with Reydisp to identify the relay. Pressing the Cancel button several times will always
return the user to this screen.
'PROTECTION HEALTHY' LED
This green LED is steadily illuminated to indicate that DC voltage has been applied to the relay power supply and
that the relay is operating correctly. If the internal relay watchdog detects an internal fault then this LED will
continuously flash.
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©2018 Siemens Protection Devices Limited
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