ABB Relion 670 series - Settings

The stub protection STBPTOC (50STB) covers the zone between the current transformers and the
open disconnector. The three-phase instantaneous overcurrent function is released from a
normally open, 89b auxiliary contact on the line disconnector.
8.9.3 Function block
M12524-3 v5
ANSI05000678-2-en.vsd
STBPTOC (50STB)
I3P*
BLOCK
BLKTR
ENABLE
TRIP
PICKUP
ANSI05000678 V2 EN-US
Figure 282: STBPTOC (50STB) function block
8.9.4 Signals
PID-3462-INPUTSIGNALS v5
Table 263: STBPTOC (50STB) Input signals
Name Type Default Description
I3P GROUP
SIGNAL
- Three phase currents
BLOCK BOOLEAN 0 Block of function
BLKTR BOOLEAN 0 Block of trip
ENABLE BOOLEAN 0 Enable stub protection usually with open disconnect switch (89b)
PID-3462-OUTPUTSIGNALS v5
Table 264: STBPTOC (50STB) Output signals
Name Type Description
TRIP BOOLEAN General trip
PICKUP BOOLEAN Pickup
8.9.5 Settings
PID-3462-SETTINGS v5
Table 265: STBPTOC (50STB) Group settings (basic)
Name Values (Range) Unit Step Default Description
Operation Disabled
Enabled
- - Disabled Operation Disabled/Enabled
EnableMode Release
Continuous
- - Release Enable stub protection usually with open
disconnect switch (89b)
IPickup 5 - 2500 %IB 1 200 Pickup current level in % of IBase
Section 8 1MRK 502 066-UUS B
Current protection
534
Technical manual