7.1.11.7
Technical revision history
Table 449:
PEMMXU Technical revision history
Technical revision
Change
B
Demand values added to Monitored data.
Recorded data added to store minimum and
maximum demand values with timestamps.
C
Internal improvement.
D
Internal improvement.
7.2
Disturbance recorder RDRE
7.2.1
Identification
Function description
IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Disturbance recorder
RDRE
DR
DFR
7.2.2
Functionality
The relay is provided with a disturbance recorder featuring preconfigured analog and
binary channels.The analog channels can be set to record either the waveform or the
trend of the currents and voltages measured.
The analog channels can be set to trigger the recording function when the measured
value falls below or exceeds the set values. The binary signal channels can be set to
start a recording either on the rising or the falling edge of the binary signal or on both.
By default, the binary channels are 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. Binary relay signals, such as protection start and trip signals, or an external
relay control signal via a binary input, can be set to trigger the recording. Recorded
information is stored in a nonvolatile memory and can be uploaded for subsequent
fault analysis.
7.2.2.1
Recorded analog inputs
The user can map any analog signal type of the protection relay to each analog channel
of the disturbance recorder by setting the
Channel selection
parameter of the
corresponding analog channel. In addition, the user can enable or disable each analog
channel of the disturbance recorder by setting the
Operation
parameter of the
corresponding analog channel to "on" or "off".
All analog channels of the disturbance recorder that are enabled and have a valid
signal type mapped are included in the recording.
1MRS757454 D
Section 7
Measurement functions
611 series
383
Technical Manual
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