ABB REF615 Applications Manual page 103

1MRS756378 D
REF615
Application Manual
GUID-F0BE506C-0A96-4AA2-AC55-FFD9BCD23951 V1 EN
Figure 50: Directional overcurrent protection and inrush indication
All operate signals are connected to the Master Trip and to the alarm LEDs. LED 1
is used for overcurrent and LED 4 for negative-sequence overcurrent protection
operate indication. LED 4 is also used for phase discontinuity protection operate
indication.
The upstream blocking from the start of the overcurrent second high stage
(PHHPTOC2) is connected to the output SO1 (X110:14-16). This output is used for
sending a blocking signal to the relevant overcurrent protection stage of the IED at
the infeeding bay.
There are four IED-variant-specific setting groups. Parameters can be set
independently for each setting group.
The active setting group (1...4) can be changed with a parameter. The active setting
group can also be changed via a binary input if the binary input is enabled for this.
To enable the change of an active setting group via a binary input, connect a free
binary input to the ActSG input of the SGCB-block with SMT.
Table 21: Binary input states and corresponding active setting groups
BI state
OFF
ON
REF615 variants
Active setting group
1
2
Section 3
97