ABB RELION REB500 Applications Manual page 45

1MRK 505 403-UEN Rev. C
Check the direction of the distance protection function with load current. This is achieved by measuring real
and apparent power in L1 phase.
The real and apparent power measurements of all the directional functions can be viewed by selecting the
HMI500 menu View /BP function monitoring . The direction Forwards or Backwards is also displayed for
both real and apparent power as soon as a valid measurement has been made.
The display is influenced by the setting CT Neutral Line side/Busbar side for the distance protection function.
The default setting of CT Neutral for the distance protection function is CTs grounded on the busbar side.
Note the following with respect to busbar protection:
The side on which the CTs are grounded is of no consequence for the busbar protection and does not
therefore have a setting. What is important, however, is that the grounding of all the CTs on the busbars is the
same (and have the same winding sense), otherwise the differential current will not be correct.
Where this is not the case, the connections to the corresponding CT inputs on the respective bay units must
be reversed (current phase-angle rotated by 180°).
In the feeders in which the current direction has been rotated in the bay unit by 180°, the setting parameter
CT Neutral of the distance function must also be respectively corrected to correspond to actual earthing
direction of the CT.
Step 11
Restore REB500 to normal operation.
6.4 Communication
The Communication Protocol Manuals describe the communication protocols supported by
the IED with a focus on vendor-specific implementations.
The communication signal engineering extends the basic signal engineering of BP described in
the present
between the
Protocol Manuals.
Table 29: Cross references
Item Topic
1
2
Bay protection functions REB500
Application manual
Application Manual . The cross reference list (see
Application Manual for BP and the relevant sections of the Communication
Logical output signals
Configuring binary output
signals
© 2019 - 2020 Hitachi Power Grids. All rights reserved
see present Application manual
for BP
Figure 1 → Item number 5
Section 4.4.4
BP-Additions to base documentation
GUID-2B534609-3BAB-4AFD-90B8-F59A4CA186C7 v2
Table 29) reflects the relationship
Communication protocol manual/
Section
IEC 61850 / Bay protection specific
signals
IEC 61850 / Bay protection specific
signals
Section 6
39