Protection Healthy/Defective; Figure 2.11-3 Typical Start-Up Events Text - Siemens 7SR18 Solkor Manual

7SR18 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.

Figure 2.11-3 Typical Start-up Events Text

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 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 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.
If the relay is withdrawn from the case, the case shorting contact will make across the normally closed contacts to
provide and external alarm.
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