2.Disturbance Recorder Data - ABB REM 610 Technical Reference Manual

REM 610
4.1.10.2.
58
Motor Protection Relay
Technical Reference Manual
As soon as the recorder has been triggered and the recording has finished, the
recording can be uploaded and analysed by means of a PC provided with a special
program.
Disturbance recorder data
One recording contains data from the four analogue channels and up to eight digital
channels. The analogue channels, whose data is stored either as RMS curves or as
momentary measured values, are the currents measured by the relay. The digital
channels, referred to as digital signals, are pickup and trip signals from the
protection elements, the alarm signal from element 49, the motor start-up signal 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, starting 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 4.1.15-5 and 4.1.15-6.
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 parameter M15; see
the table below for details.
Table 4.1.10.2-1 Sampling frequency
Nominal frequency Sampling frequency
Hz Hz
50 800
400
50
60 960
480
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
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.
Cycles
250
500
1) 4000
250
500
1) 4000
[ ]
1MRS 755537