ABB REU 523 Technical Reference Manual page 35

1MRS 750942-MUM
Combined Overvoltage and Undervoltage Relay
Technical Reference Manual
the line-idle state "light off" to the relay and "light on" to the master. However, the
RER 125 is not required if the master is compatible with the line-idle state "light
off".
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The REU 523 will use the SPA bus protocol as default when the rear connection is
in use. The IEC_103 protocol can be selected through the HMI of the relay. The
selection is memorized and will therefore always be activated when the rear
connection is in use. The use of the IEC_103 protocol in the REU 523 requires a
baud rate of 9.6 kbps. When the IEC_103 protocol has been selected, event masks
are not in use. Therefore, all events in the configuration set are included in the event
reporting.
The REU 523 is provided with two different selectable configuration sets, of which
configuration set 1 is used by default. Configuration set 1 provides full compatibility
according to the IEC_103 standard. Configuration set 2 provides all applicable
information of the protection equipment. However, some information elements have
been mapped to a private range. Configuration set 255 is reserved for future use.
The tables below indicate the information mapping of the corresponding
configuration sets. The column GI indicates whether the status of the specified
information object is transmitted within the general interrogation cycle. The relative
time in messages with the type identification 2 is calculated as a time difference
between the occurred event and the event specified in the column Relative time. The
measurand multiplied by the normalize factor is proportional to the rated value.
Therefore, the maximum value of each measurand is the normalize factor multiplied
by the rated value.
IEC_103Comm
REU 523
35