System Settings; Voltage Transformers For Bay Protection; Star Point Setting For Bay Protection - ABB RELION REB500 Technical Manual

1MRK 505 406-UEN B
Section 4
4.1

Voltage transformers for bay protection

The HMI500 Settings/Voltage transformers/Overview tab opens a dialog with the list of all
voltage transformers in the single-line diagram with their labels, bay labels primary and
secondary rated voltages.
In the Details view, the description can be edited in the input field Markings. The ratio is
determined by the primary and secondary ratings entered in the Transformer ratio input field.
The VT input is a single winding, which is suitable for all the main VT secondary ratings, the
effective voltage being set via HMI500 to either 100 V or 200 V. Other voltages are
accommodated by appropriately setting the scaling factor.
This menu item appears only if voltage transformers have been fitted.
IEC19000402 V1 EN-US
Figure 1:
4.2

Star point setting for bay protection

Setting example for BP applications:
VT data:
UN primary =
UN secondary =
Connection to REB500:
Bay protection functions REB500
Technical manual

System settings

Settings/Voltage transformers
If a REB500 bay unit includes bay protection functionality with 3-phase voltage
measurement, the mode of VT connection 3Phase_Star is mandatory.
© Copyright 2019 ABB. All rights reserved
17000039-IEC19000402-1-en.vsdx
220 kV / √3
110 V / √3
3 phases_star (mandatory connection)
Section 4
System settings
GUID-C56299BD-E6CE-4FD3-A0C4-6040FFEAF8D0 v1
GUID-E46BBD87-3168-4615-9034-73AC7E11B8E4 v1
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