Hitachi Relion 670 Series Applications Manual page 414
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Also See for Relion 670 Series:
- Applications manual (354 pages) ,
- Commissioning manual (284 pages) ,
- Product manual (192 pages)
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Section 21
Basic IED functions
the IED is required. Either FineSyncSource is set to the same source that the merging unit uses, or
the PPS output from the GTM module is used to synchronize the merging unit. If the PPS output from
the GTM module is used to synchronize the merging unit and PTP is not used, the IED does not
know how the merging unit is synchronized and the parameter SyncLostMode must be set to
NoBlock.
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If the IED is used together with a merging unit and no time synchronization is available,
for example, in the laboratory test, the IED will synchronize to the SV data stream. During
the re-synchronization, the protection functions will be blocked once a second for about
45 ms, and this will continue for up to 10 minutes. To avoid this, configure PTP (IEEE
1588) to On for the access point where the merging unit is configured.
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Railway application RER670
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