Protection Healthy/Defective; Figure 2-13 Start-Up Events - Siemens 7SR105 Rho User Manual

7SR105 Rho Description of Operation
Once the Relay has failed in this manner, it is non-recoverable at site and must be returned to the manufacturer
for repair.
A meter, Miscellaneous Meters>Unexpected Restarts, is provided to show how many Unexpected Restarts have
occurred during the previous Unexpected Restart Period. This is resettable from the front fascia.
2.12.1

Protection Healthy/Defective

When the relay has an auxiliary supply and it has successfully passed its self-checking procedure, then the front
fascia Protection Healthy LED is turned on.
A changeover or open contact can be mapped via the binary output matrix to provide an external protection
healthy signal.
A changeover or closed contact can be mapped via the binary output matrix to provide an external protection
defective signal. With the 'Protection Healthy' this contact is open. When the auxiliary supply is not applied to the
relay or a problem is detected within the relay then this output contact closes to provide external indication.

Figure 2-13 Start-up Events

©2018 Siemens Protection Devices Chapter 1 Page 21 of 57