ABB RELION REX640 Technical Manual page 1493

Protection and control

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1MRS759142 F

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

The states of manual triggering and periodic triggering are not included in the

recording, but they create a state change to the

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 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.

The binary channels are sampled once per task execution of the disturbance

recorder. The task execution interval for the disturbance recorder is the same as

for the protection functions. During the COMTRADE conversion, the digital status

values are repeated so that the sampling frequencies of the analog and binary

channels correspond to each other. This is required by the COMTRADE standard.

Table 1438: RDRE Output signals

Technical Manual

The IP number of the protection relay and the value of the

parameter are both included in the COMTRADE configuration file for

identification purposes.

COMTRADE is the general standard format used for storing disturbance

The disturbance recorder follows the 1999 version of the COMTRADE

standard and uses the binary data file format.

Measurement functions

Periodic triggering and Manual

Recording started