Event Log; Recorded Data - ABB REX640 Product Manual

REX640
Product version: 1
The binary channels can be set to record external or internal
relay signals, for example, the start or trip signals of the relay
stages, or external blocking or control signals. The recorded
information is stored in a nonvolatile memory in COMTRADE
format and can be uploaded for subsequent fault analysis.

14. Event log

To collect sequence-of-events information, the relay has a
nonvolatile memory capable of storing 1024 events with the
associated time stamps. The event log facilitates detailed pre-
and post-fault analyses of feeder faults and disturbances. The
considerable capacity to process and store data and events in
the relay supports the growing information demand of future
network configurations.
The sequence-of-events information can be accessed either via
the LHMI or remotely via the communication interface of the
History view
GUID-B3049DBE-4136-4774-9E9D-CB1762AAE858 V1 EN
Figure 17. Event recording
22
Process
events
1024
(FIFO)
Fault
records
128
( FIFO )
Fault summary;
Trip timestamp, Function, Currents, V oltages, etc.
Audit
trail
events
( FIFO )
2048
System and security - related events;
Configuration changes, Control, Login, etc.
Disturbance
records
n...100
Load profile
record
...7 yrs
Historical load data captured at a periodical
time interval (Demand interval 1 ...180min)
Function specific data
Min/max demand currents, Operation counters, etc.
relay. The information can also be accessed locally or remotely
using the Web HMI.

15. Recorded data

The relay can store the records of the latest 128 fault events.
The records can be used to analyze the power system events.
Each record includes, for example, current, voltage and angle
values and a time stamp. The fault recording can be triggered
by the start or the trip signal of a protection block, or by both.
The available measurement modes include DFT, RMS and
peak-to-peak. Fault records store relay measurement values
when any protection function starts. In addition, the maximum
demand current with time stamp is separately recorded. The
records are stored in the nonvolatile memory.
1MRS759144 A
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