8.2.2 Function block
Figure 816: Function block
8.2.3 Functionality
The protection relay is provided with a disturbance recorder featuring up to 24
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 and they
can 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.
8.2.3.1 Recorded analog and binary inputs
The relay's analog and binary signals for disturbance recorder can be configured
with Application Configuration in PCM600. In addition, each channel of the
disturbance recorder can be enabled or disabled by setting the
Operation
parameter of the corresponding channel to "on" or "off".
All channels of the disturbance recorder that are enabled and have a valid signal
connected are included in the recording.
8.2.3.2 Triggering alternatives
The recording can be triggered by any of the following alternatives.
• Triggering according to the state change of any of the binary channels of the
disturbance recorder. The level sensitivity can be set with the
Level trigger mode
parameter of the corresponding binary channel.
• Triggering on limit violations of the analog channels of the disturbance 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 the Recording started
and Recording made events. The Recording made event indicates that the recording
has been stored to the nonvolatile memory. In addition, every analog channel
and binary channel of the disturbance recorder has its own
Channel triggered
parameter. Manual trigger has the
Manual triggering
parameter and periodic trigger
has the
Periodic triggering
parameter.
1MRS759142 F
Measurement functions
REX640
Technical Manual
1487
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