Application - ABB RELION REX640 Technical Manual

1MRS759142 C
8.2.5
REX640
Technical Manual
recorder. These signals can be, for example, the start and trip signals from protection
function blocks or the external binary inputs of the protection relay. The connection
is made with dynamic mapping to the binary channel of the disturbance recorder
using, for example, Signal Matrix of PCM600. It is also possible to connect several
digital signals to one binary channel of the disturbance recorder. In that case, the
signals can be combined with logical functions, for example AND and OR. The name
of the binary channel can be configured and modified by writing the new name to the
Channel id text parameter of the corresponding binary channel.
The Channel id text parameter is used in COMTRADE configuration
files as a channel identifier.
The recording always contains all binary channels of the disturbance recorder. If one
of the binary channels is disabled, the recorded state of the channel is continuously
FALSE and the state changes of the corresponding channel are not recorded. The
corresponding channel name for disabled binary channels in the COMTRADE
configuration file is Unused BI.
To enable or disable an analog or a binary channel of the disturbance recorder, the
Operation parameter of the corresponding analog or binary channel is set to "on" or
"off".
The states of manual triggering and periodic triggering are not included in the
recording, but they create a state change to the Periodic triggering and Manual
triggering status parameters, which in turn create events.
The TRIGGERED output can be used to control the indication LEDs of the protection
relay. The triggering of the disturbance recorder sets the TRIGGERED output to
TRUE. The output remains in this state until all the data for the corresponding
recording has been recorded.
The IP number of the protection relay and the value of the Bay name
parameter are both included in the COMTRADE configuration file for
identification purposes.

Application

The disturbance recorder is used for post-fault analysis and for verifying the correct
operation of protection relays and circuit breakers. It can record both analog and
binary signal information. The analog inputs are recorded as instantaneous values and
converted to primary peak value units when the protection relay converts the
recordings to the COMTRADE format.
COMTRADE is the general standard format used for storing
disturbance recordings.
Section 8
Measurement functions
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