ABB Relion 670 series, Technical Reference Manual, Page: 107 / 1232

29-30) or an FT switch finger can supply a binary input which in turn is configured to
the TESTMODE function block.
Each of the functions includes the blocking from the TESTMODE function block. A
typical example from the undervoltage function is shown in figure
33 .
The functions can also be blocked from sending events over IEC 61850 station bus to
prevent filling station and SCADA databases with test events, for example during a
maintenance test.
Time
V
Normal voltage
Pickup1
Pickup2
IntBlkStVal1
IntBlkStVal2
Disconnection
tBlkUV1 <
t1,t1Min
tBlkUV2 <
t2,t2Min
Block step 1
Block step 2
en05000466_ansi.vsd
ANSI05000466 V1 EN
Figure 33: Example of blocking the time delayed undervoltage protection function.
1MRK505222-UUS C
Section 4
Basic IED functions
101
Technical reference manual