7SR210 & 7SR220 Description of Operation
Unrestricted Page 24 of 94
©2018 Siemens Protection Devices Limited
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An alarm can be provided if the relay is withdrawn from the case.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25-26 of the PSU module, this contact closes when the relay is withdrawn.
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
Page 414: ...7SR220 Technical Manual Chapter 4 Page 34 of 96 2017 Siemens Protection Devices Limited ...
Page 466: ...7SR220 Technical Manual Chapter 4 Page 86 of 96 2017 Siemens Protection Devices Limited ...
Page 468: ...7SR220 Technical Manual Chapter 4 Page 88 of 96 2017 Siemens Protection Devices Limited ...
Page 470: ...7SR220 Technical Manual Chapter 4 Page 90 of 96 2017 Siemens Protection Devices Limited ...
Page 472: ...7SR220 Technical Manual Chapter 4 Page 92 of 96 2017 Siemens Protection Devices Limited ...
Page 643: ...Unrestricted ...