ABB Relion 630 Series, Technical Manual

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Internal events are generated by the built-in supervisory functions. The supervisory
functions supervise the status of the various modules in the IED and, in case of failure,
a corresponding event is generated. Similarly, when the failure is corrected, a
corresponding event is generated.
Apart from the built-in supervision of the various modules, events are also generated
when the status changes for the built-in real time clock (in operation/out of order) or
external time synchronization (in operation/out of order). Events are also generated
whenever any setting in the IED is changed.
The internal events are time tagged with a resolution of 1 ms and stored in a list. The
list can store up to 40 events. The list is based on the FIFO principle, that is, when it
is full, the oldest event is overwritten. The list can be cleared via the LHMI.
The list of internal events provides valuable information, which can be used during
commissioning and fault tracing.
The list of internal events can be found in the LHMI, WHMI or PCM600.
The list can be cleared via the LHMI or WHMI menu Clear/Clear internal event
list .
3.15.6 Technical data
Table 64: Self supervision with internal event list
Data Value
Recording manner Continuous, event controlled
List size
3.16 Time synchronization
3.16.1 Functionality
The time synchronization source selector is used to select a common source of
absolute time for the IED when it is a part of a protection system. This makes it
possible to compare event and disturbance data between all IEDs in a station
automation system.
Do not use the MicroSCADA OPC server as a time synchronization
source.
Section 3
1MRS757256 F
Basic functions
98 PML630/Compact Load-Shedding Solution
Technical Manual