Overwrite mode
When the operation mode is "Overwrite" and the recording memory is full, the oldest
recording is overwritten with the pre-trigger data collected for the next recording. Each
time a recording is overwritten, the event is generated via the state change of the
Overwrite
of rec.
parameter. The overwrite mode is recommended, if it is more important to have the
latest recordings in the memory. The saturation mode is preferred, when the oldest
recordings are more important.
New triggerings are blocked in both the saturation and the overwrite mode until the
previous recording is completed. On the other hand, a new triggering can be accepted
before all pre-trigger samples are collected for the new recording. In such a case, the
recording is as much shorter as there were pre-trigger samples lacking.
8.2.2.10
Exclusion mode
Exclusion mode is on, when the value set with the
Exclusion time
parameter is higher than
zero. During the exclusion mode, new triggerings are ignored if the triggering reason is the
same as in the previous recording. The
Exclusion time
parameter controls how long the
exclusion of triggerings of same type is active after a triggering. The exclusion mode only
applies to the analog and binary channel triggerings, not to periodic and manual
triggerings.
When the value set with the
Exclusion time
parameter is zero, the exclusion mode is
disabled and there are no restrictions on the triggering types of the successive recordings.
The exclusion time setting is global for all inputs, but there is an individual counter for
each analog and binary channel of the disturbance recorder, counting the remaining
exclusion time. The user can monitor the remaining exclusion time with the
Exclusion
time rem
parameter (only visible via communication, IEC 61850 data ExclTmRmn) of the
corresponding analog or binary channel. The
Exclusion time rem
parameter counts
downwards.
8.2.3
Configuration
The disturbance recorder can be configured with PCM600 or any tool supporting the IEC
61850 standard.
The disturbance recorder can be enabled or disabled with the
Operation
parameter under
the
Configuration/Digital fault recorder/General
menu.
One analog signal type of the protection relay can be mapped to each of the analog
channels of the disturbance recorder. The mapping is done with the
Channel selection
parameter of the corresponding analog channel. The name of the analog channel is user-
1MAC059074-MB A
Section 8
Measurement functions
615 series ANSI
943
Technical Manual
Summary of Contents for Relion 615 series
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