Disturbance Recorder Rdre; Functionality - ABB RELION 620 Series Technical Manual

1MRS757644 H
8.1.12.7 Technical revision history
Table 946: PEMMXU Technical revision history
Technical revision
B
C
D
8.2

Disturbance recorder RDRE

8.2.1

Functionality

The relay is provided with a disturbance recorder featuring up to 12 analog and
64 binary signal 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.
8.2.1.1 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
the corresponding analog channel. In addition, the user can enable or disable each
analog channel of the disturbance recorder by setting the
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.
8.2.1.2 Triggering alternatives
The recording can be triggered by any or several of the following alternatives:
• Triggering according to the state change of any or several of the binary channels
of the disturbance recorder. The user can set the level sensitivity with the
trigger mode parameter of the corresponding binary channel.
620 series
Technical Manual
Measurement functions
Change
Demand values added to Monitored data. Re-
corded data added to store minimum and
maximum demand values with timestamps.
Internal improvement.
Internal improvement.
Channel selection parameter of
Operation parameter of
Level
965