ABB RELION REB670, Руководство по применению

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1. Connect the two auxiliary contacts (i.e. normally open and normally closed
auxiliary contacts or also sometimes called “a & b contacts”) from each of the
three sectionalizing disconnectors to the IED. This can be done by wiring using
binary inputs or via communication (e.g. via GOOSE or via LDCM).
2. Use three BDCGAPC function blocks (i.e. one per busbar disconnector) to derive
open or closed status of the respective disconnector primary contacts.
3. Connect the close status output from each BDCGAPC function block to the
respective zones merging input on the common BBP function block BDZSGAPC.
This will ensure proper dynamic linking of the affected differential zones.
ACT configuration example for three bus-sectionalizing disconnectors presenting in
this station is given in Figure
81 .
IEC16000151-1.en.vsdx
IEC16000151 V1 EN-US
Figure 81: ACT configuration example for three bus-sectionalizing disconnectors
6.1.6 Summation principle
GUID-B09585B4-A1B8-4E29-A469-25997493E434 v1
Summation principle is mainly intended for two-zone busbar protection applications.
6.1.6.1 Introduction
M12135-3 v4
A simplified bus differential protection for phase and ground faults can be obtained by
using a single one-phase IED with external auxiliary summation current transformers
for all busbar arrangements with up to two differential zones. By using this approach,
more cost effective bus differential protection can be obtained. Such a solution makes
it feasible to apply bus differential protection even to medium voltage substations. The
1MRK 505 370-UUS A
Section 6
Differential protection
Busbar protection REB670 2.2 ANSI 163
Application manual