Protection Healthy/Defective; Figure 2.11-3 Start-Up Counter Meter Events - Siemens Argus 7SR21 Technical Manual

7SR210 & 7SR220 Description of Operation
The relay will enter a locked-out mode, while in this mode it will disable operation of all LED's, Binary Outputs,
including Protection Healthy, pushbuttons and any data communications activity. 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.
The following screen-shot shows the events, which are generated when the relay re-starts. The highlighted events
show the cause of the re-start. The event which comes next shows the type of restart followed by the relay:
Warm, Cold or Re-Start.

Figure 2.11-3 Start-up Counter Meter Events

2.11.1

Protection Healthy/Defective

When the relay has an auxiliary DC supply and it has successfully passed its self-checking procedure then the
front facia Protection Healthy LED is turned on.
A normally open contact can be used to signal protection healthy. When the relay has DC supply and it has
successfully passed its self-checking procedure then the Protection Healthy contacts are made.
A changeover or normally 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 DC supply is not
applied to the relay or a problem is detected within the relay then this output contact closes to provide external
indication.
An alarm can be provided if the relay is withdrawn from the case. A contact is provided in the case at positions
25-26 of the PSU module, this contact closes when the relay is withdrawn.
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