Triggering; Settings And Unloading; Event Code Of The Disturbance Recorder; Recorded Data Of The Last Events - ABB REJ 527 Technical Reference Manual

1MRS 750616-MUM
4.1.7.4.
4.1.7.5.
4.1.7.6.
4.1.8.
Directional or Non-Directional Earth-Fault Relay
Technical Reference Manual
Writing the value 1 to parameter M2 will clear the recorder memory, restart the
storing of new data and enable the triggering of the recorder. Recorder data can be
cleared by performing a master reset. Writing the value 2 to parameter V246 will
restart the unloading process by setting the time stamp and the first data ready to be
read.

Triggering

The user can select the start or trip signal from any protection stage and/or the
external binary input signal to trigger the disturbance recorder, either on the rising
or falling edge of the signal(s). Triggering on the rising edge means that the
post-triggering recording sequence will start when the signal is activated.
Correspondingly, triggering on the falling edge means that the post-triggering
recording sequence will start when the active signal is reset. The trigger signal(s)
and the edge are selected with parameters V241...V244; see tables 4.1.9.4-5 and
4.1.9.4-6. The recorder can also be triggered manually using parameter M1.
Triggering of the disturbance recorder is only possible if the recorder has not already
been triggered.

Settings and unloading

The setting parameters for the disturbance recorder are V parameters V240...V246
and M parameters M15, M18, M20, M80 and M81.
Unloading the recorder requires that M80 and M81 have been set. Unloading is done
using a PC application. The uploaded recorder data is stored in separate files defined
®
by the comtrade format.

Event code of the disturbance recorder

The disturbance recorder generates an event code (E31) on triggering of the recorder
by default. The event mask is defined using serial parameter V158.

Recorded data of the last events

The REJ 527 records up to five events. This enables the user to analyze the last five
fault situations in the electrical power network. Each event includes the measured
zero-sequence voltage, non-directional earth-fault current, directional
earth-fault current and phase angle, start durations, and the time stamp. Additionally,
information on the number of starts is provided.
Recorded data and the number of starts are non-volatile by default. A master reset
will erase the contents of the recorded events and the number of starts.
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