7SG12 DAD N Commissioning
©2010 Siemens Protection Devices Limited Chapter 7 Page 8 of 8
• Verify that there is minimal Diff Currents displayed, thus verifying that the Differential circuit is balanced.
14. Putting into Service
Ensure that:
The trip supply is connected.
All the RED LEDs are off.
The GREEN LED is ON steady.
All earth links, trip links and inter-trip links are in their normal operational positions.
Operate the Cancel PUSH BUTTON
Check that the LCD displays the screen below, or the ‘Relay Identifier’ set in the SYSTEM CONFIG MENU.
DAD-N
Replace the cover. The above reading will remain for approximately 1 hour then the display will go blank.
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