Drec - ABB REX 521 Technical Reference Manual, Standard Configurations

1MRS 751802-MUM
7.3.4.
Protection Relay
Technical Reference Manual, Standard Configurations
Residual voltage measurement, Uo
Uo
Uo

DREC

The transient disturbance recorder DREC is used for recording current waveforms
and, when available, voltage waveforms. Furthermore, start and trip signals from the
protection functions are recorded. The amount of recorded signals is standard
configuration specific; refer to the block diagram of the standard configuration.
The default setting for the analogue channels recorded in DREC does not include I
measurement. When I
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channel setting has to be changed in Main menu\Measurement\DREC\
GeneraL info\AI chs used.
Recording can be triggered on the rising or falling edge of any or several of the
digital inputs, on an adjustable level of overcurrent, overvoltage or undervoltage, or
the recording can be triggered manually via the HMI, via serial communication or a
parameter, or using a periodic triggering.
DREC
IL1
IL2
IL3
Io
Start 3I>
Iob
Start 3I>>
BI1
Start 3I>>>
BI2
Start Io>
BI3
Start Io>>
BI4
Start Io>>>
BI5
Start 3Iub>
BI6
Start 3Ith>
BI7
Trip 3I>
BI8
Trip 3I>>
BI9
Trip 3I>>>
BI10
Trip Io>
BI11
Trip Io>>
BI12
Trip Io>>>
BI13
Trip 3Iub>
BI14
Trip 3Ith>
BI15
BI16
EXT_TRG
)LJ  )XQFWLRQ EORFN V\PERO RI '5(&
0...150000 V
0.0...120.0% Un
is in use and it is wanted to record data, the used analogue
REX 521
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