Table of Contents
Advertisement
1MRS 755310
4.1.11.4.
4.1.11.5.
4.1.11.6.
4.1.12.
Feeder Protection Relay
Technical Reference Manual
has not been triggered or triggered and ready to be uploaded. Event code E31 will
be generated the moment the disturbance recorder is triggered. If the recorder is
ready to be uploaded, this will also be indicated by an asterisk shown in the lower
right-hand corner of the LCD when it is in the idle mode.
Writing the value 1 to SPA parameter M2 will clear the recorder memory, restart the
recording of new data and enable the triggering of the recorder. Recorder data can
be cleared by performing a master reset, i.e. clearing indications and memorized
values and unlatching output contacts. Writing the value 2 to SPA 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 one or several internal or digital input signals 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 SPA parameters V236...V237 and
V241...V242; see tables 4.1.17-6 and 4.1.17-7. The recorder can also be triggered
manually with SPA 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 V236...V238,
V240...V243 and V246, and M parameters M15, M18, M20 and M80...M83.
Unloading correct information from the recorder requires that M80 and M83 have
been set. Unloading is done using a PC application. The uploaded recorder data is
stored in separate files defined by the comtrade
Event code of the disturbance recorder
The disturbance recorder generates an event code on triggering (E31) and clearing
(E32) the recorder. The event mask is determined using SPA parameter V155.
Recorded data of the last events
REF 610 records up to five events. This enables the user to analyze the last five fault
conditions in the electrical power network. Each event includes the measured
currents, start durations and time stamp, for instance. Additionally, information on
the number of starts, trips and auto-reclose shots is provided.
Recorded data is non-volatile by default, provided that the battery has been inserted
and is charged. A master reset, i.e. clearing of indications and memorized values and
unlatching of output contacts, will erase the contents of the stored events and the
number of starts.
REF 610
format.
67
Advertisement
Table of Contents
