ABB RER620, Technical Manual

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Section 8
Recording functions
RER620 413
Technical Manual
Section 8 Recording functions
8.1 Digital fault recorder DFR (RDRE)
8.1.1
F
unctionality
The relay is provided with a digital fault 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 voltage 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 on the rising or the falling edge of the binary signal or 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 a protection start or trip signal, or an external relay control
signal over a binary input can be set to trigger the recording. The recorded information is
stored in a non-volatile memory and can be uploaded for subsequent fault analysis.
8.1.1.1 Recorded analog inputs
The current RER 620 release does not support selection of analog channels for disturbance
(DFR) recorder. 10 channels of RDRE/DFR component are pre-mapped to following
analog inputs: IL1, IL2, IL3, Io, U1,U2, U3, U2A, U2B,U2C.
All analog inputs of the digital fault recorder that are enabled are included in the recording
when triggered appropriately.
8.1.1.2 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 digital fault recorder. The user can set the level sensitivity with the Level trigger
mode parameter of the corresponding binary channel.
• Triggering on limit violations of the analog channels of the digital fault recorder (high
and low limit)
• Manual triggering via the Trig recording parameter (LHMI or communication)
• Periodic triggering.
Regardless of the triggering type, each recording generates events through state changes
of the
Recording started , Recording made and Recording stored status parameters. The
Recording stored parameter indicates that the recording has been stored to the non-volatile
memory. In addition, every analog channel and binary channel of the digital fault recorder