The start-up behaviour of Boundary Clocks
To send to Hubert for next 9-3 revision
The start-up behaviour of BCs is unsatisfactory.
A BC in holdover (i.e. grandmaster with no time reference), should not return to BC mode when the time reference is restored before its clock oscillator stabilizes to the new grandmaster. The tested BC when connected to the time reference (GPS) immediately forward the GrandMaster time advertising the accuracy of the grandmaster.
Otherwise, all slave clocks below the BC will be subject to the additional jitter of the BC’s clock resynchronizing to the GM.
This can be tested by disconnecting the BC for some minutes and then reconnect it to the grandmaster.
Assigned to IEC 61850-9-3
Updated by Vladan Cvejic almost 2 years ago
- Subject changed from The start-up behaviour of BCs is unsatisfactory. A BC in holdover (i.e. grandmaster with no time reference), should not return t to The start-up behaviour of Boundary Clocks
- Category set to Standard clarification required
- Status changed from New to In Progress
- Standard(s) changed from 3-Sep to IEC 61850-9-3
- Discuss in Upcoming Meeting set to No