3.Control And Target Of Disturbance Recorder Status - ABB REF 610 Technical Reference Manual

1MRS 755535
4.1.11.3.
Feeder Protection Relay
Technical Reference Manual - ANSI Version
channels, referred to as digital signals, are pickup and trip signals from the
protection elements, the alarm signal from element 49, the signals from the auto-
reclose function and the digital input signals linked to the relay.
The user can select up to eight digital signals to be recorded. If more than eight
signals are selected, the first eight signals will be stored, beginning with the internal
signals followed by the digital input signals. The digital signals to be stored are
selected with parameters V238 and V243; see tables 4.1.17-6 and 4.1.17-7.
The recording length varies according to the selected sampling frequency. The RMS
curve is recorded by selecting the sampling frequency to be the same as the nominal
frequency of the relay. The sampling frequency is selected with SPA parameter
M15; see the table below for details.
Table 4.1.11.2-1 Sampling frequency
Nominal frequency Sampling frequency
Hz
50
60
1)
RMS curve.
Recording length:
Cycles
s [ ]
=
---------------------------------------------------------------- -
Nominal frequency Hz
Changing the setting values of parameters M15, V238 and V243 is allowed only
when the recorder is not triggered.
The post-triggering recording length defines the time during which the recorder
continues to store data after it has been triggered. The length can be changed with
SPA parameter V240. If the post-triggering recording length has been defined to be
the same as the total recording length, no data stored prior to the triggering will be
retained in the memory. By the time the post-triggering recording finishes, a
complete recording will have been created.
Triggering of the recorder immediately after it has been cleared or the auxiliary
voltage connected may result in a shortened total recording length. Disconnection of
the auxiliary voltage after the recorder has been triggered, but before the recording
has finished, on the other hand, may result in a shortened post-triggering recording
length. This, however, will not affect the total recording length.
At a power reset, triggered recorder data will be retained in the memory provided
that it has been defined non-volatile.
Control and target of disturbance recorder status
It is possible to control and monitor the recording status of the disturbance recorder
by writing to and reading SPA parameters M1, M2 and V246. Reading SPA
parameter V246 will return either the value 0 or 1, indicating whether the recorder
Cycles
Hz
800 250
400 500
4000
1)
50
960 250
480 500
1) 4000
60
[ ]
REF 610
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