Hitachi ABB RELION REB500 Communication Protocol Manual page 18

Section 3
Interbay bus functions
IEC18000536 V1 EN-US
Figure 6:
Settings in this dialog box are made for each busbar section (bus zone) and can be changed
after activating the respective field. The differential current parameters are as follows:
Table 4:
Item
Update
period
Enabled
Delta
L1_L2_L3
Dead band
L1_L2_L3
Delta L0
Dead band L0
12
Settings/Communication/SCS Diff. Current Parameters
SCS differential current parameters
Description
Determines how often the differential
current measurement has to be
updated.
Enables polling of the bus zone
differential currents.
Applies to all bus zones. Delta per bus
zone for phases L1, L2 and L3.
Dead band per bus zone for phases
L1, L2 and L3.
Delta per bus zone for the neutral
current L0.
Dead Band per bus zone for the
neutral current L0
Delta and Dead band settings that are too low, result in a high data load on the
bus. For this reason, care should be taken to set reasonable values.
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12000190-IEC18000536-1-en.vsdx
Min. Max. Default Step
0 1000 60
yes no Yes
0 65535 10
0 65535 5
0 65535 10
0 65535 5
Distributed busbar protection REB500
Communication protocol manual IEC 60870-5-103
1MRK 511 451-UEN Rev. C
Unit
100 s
1 A
1 A
1 A
1 A