ABB RED650 Technical Manual page 387

1MRK 505 394-UEN A
Line differential protection RED650 2.2 IEC
Technical manual
desired position within the two time limits tStartMove and tIntermediate. The
default values for tStartMove and tIntermediate are for a breaker. The typical
values for a disconnector are:
• tStartMove = 3s
• tIntermediate = 15s
In most cases, tStartMove and tIntermediate can be set to the same
values as in the source XCBR function. However, if the time limits
are set very close to the actual movement times of the apparatus,
compensation may be needed for the communication delays and
differences in cycle time of the XLNPROXY function and the
source function. The compensation should be in the range of 0 -
5ms.
When the switch has started moving, it issues a response to the SCSWI function
that the operation has started. If it does not start moving within tStartMove, the
command is deemed as failed, and a cause is raised on the L_CAUSE output and
sent to the SCSWI. The different causes it can identify are listed in order of priority
in table 1. The detection of the different ways of blocking is done while waiting for
movement of the switch, but the cause is not given until the tStartMove has
elapsed.
Table 204: Possible cause values from XLNPROXY
Cause Cause Description
No
8 Blocked-by-Mode
2 Blocked-by-switching-hierarchy
-24 Blocked-for-open-cmd
-25 Blocked-for-close-cmd
9 Blocked-by-process
5 Position-reached
-31 Switch-not-start-moving
-32 Persistent-intermediate-state
-33 Switch-returned-to-init-pos
-34 Switch-in-bad-state
-35 Not-expected-final-position
The L_CAUSE output keeps its output value until a new command sequence has
been started.
Conditions
The BEH input is 5.
The LOC input indicates that only local commands are
allowed for the breaker IED function.
The BLKOPN is active indicating that the switch is
blocked for open commands.
The BLKCLS is active indicating that the switch is
blocked for close commands.
If the Blk input is connected and active indicating that the
switch is dynamically blocked. Or if the OPCAP input is
connected, it indicates that the operation capability of the
switch is not enough to perform the command.
Switch is already in the intended position.
Switch did not start moving within tStartMove.
The switch stopped in intermediate state for longer than
tIntermediate.
Switch returned to the initial position.
Switch is in a bad position.
Switch did not reach the expected final position.
Section 12
Control
381