• Monitoring/I/O status/Analog inputs
• Monitoring/IED status/SMV traffic
• Monitoring/IED status/SMV accuracy
Table 19: SMV receiver
Item
Description Checked
WARNING
WARNING
(Monitoring/I/O status/Analog inputs/
Voltage(3U,VT)) works as specified in the Application
Configuration tool. Necessary special handling considered in the
Application Configuration tool logics.
WARNING
is active when
the IED starts.
ALARM
ALARM
(Monitoring/I/O status/Analog inputs/Voltage(3U,VT))
works as specified in the Application Configuration tool.
Necessary special handling considered in the Application
Configuration tool logics.
ALARM
is active when the IED starts.
Max delay The maximum delay (Monitoring/IED status/SMV traffic) must be
in all conditions smaller than the
SMV Max Delay
parameter
(Configuration/System). Larger values indicate configuration
problems in the network or the need to change the
SMV Max
Delay
.
Average delay The average delay (Monitoring/IED status/SMV traffic) variation
is small in different network traffic setups. A large variation may
indicate configuration problems in the network.
Measurement In the SMV receivers' Measurement view, the voltage values
should be without brackets indicating good status. Brackets
indicate questionable or invalid values. The
SMV traffic delay
(Monitoring/IED status/SMV traffic) value should be lower than
the value of
SMV Max delay
(Max 6.48ms).
Table 20: Time synchronization
Item
Description Checked
Time quality Observe the grandmaster accuracy (Monitoring/IED status/Time
synchronization/IEEE 1588). The accuracy decreases slowly if
the GPS antenna is removed. The IED GNRLLTMS1 WARNING
signal is activated if the accuracy is not within the specified limits.
Missing clock Disable the clock master and check that one IED takes the clock
master role.
PTP priority 1 Compare priorities against the grandmaster's priority. The clock
master should have smaller value (bigger priority).
PTP priority 2 Same as above, but PTP priority 2 handles the selection when
PTP priority 1 is the same. Can be used to set priorities to the
IEDs in situation when the clock master fails.
SMV Synch accuracy The global clock is seen when the clock master is present.
Local synch accuracy According to 9-2 LE the synchronization accuracy needs to be
better than 4 μs which is the defined supervision limit.
1)
Max Dev synch
Accuracy
According to 9-2 LE the synchronization accuracy needs to be
better than 4 μs which is the defined supervision limit.
1)
Grandmaster Check the grandmaster monitoring from the master
configuration via the LHMI path Monitoring/IED status/Time
synchronization/IEEE 1588. Check that all IEDs are
synchronized to same PTP master.
1) 4 μs corresponds to approximately 0.07 degrees in 50 Hz systems
1MRS757809 C Section 6
Process bus and IEEE 1588 time synchronization
REC615 and RER615 79
Engineering Guide
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