ABB SACE Tmax XT2 User Manual page 60

OQ Protection Function
If one or more reactive powers read by the unit exceeds the Q27 threshold for a time greater than
t27, the protection sends the TRIP command.
To verify and simulate the trip times based on all the parameters, see:


Parameters
Parameter
Enable
Trip Enable
Threshold
Q27
Time t27
Constraints, limitations, and additional functions
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, see page70.
Function
OP Protection
If one or more active powers read by the unit exceeds the P26 threshold for a time greater than
t26, the protection sends the TRIP command.
To verify and simulate the trip times based on all the parameters, see:


Parameters
Parameter
Enable
Trip Enable
Threshold
P26
Time t26
Constraints, limitations, and additional functions
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, see page70.
1SDH002031A1002 ECN000092998
Protection summary table with the operating characteristics (page 79)
Chart with tripping curve (page 92)
Description
Enables/disables protection and availability on menu of the
parameters
Activates/deactivates the open command: if disabled, the alarm
and the lapsing of the protection time are managed only as
information
Defines the value that activates the protection.
The value is expressed both as an absolute value (kVAR) and as a
relative value (Sn), settable in a range:
0.4 Sn .. 2 Sn with 0.001 Sn step
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range:
0.5 s ..100 s, with 0.5 s step
Protection summary table with the operating characteristics (page 79)
Chart with tripping curve (page 92)
Description
Enables/disables protection and availability on menu of the
parameters
Activates/deactivates the open command: if disabled, the alarm
and the lapsing of the protection time are managed only as
information
Defines the value that activates the protection.
The value is expressed both as an absolute value (kW) and as a
relative value (Sn), settable in a range:
0.4 Sn .. 2 Sn with 0.001 Sn step
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range:
0.5 s ..100 s, with 0.5 s step
Rev. B
Default
OFF
OFF
1 Sn
1 s
Default
OFF
OFF
1 Un
1 s
SACE Tmax XT2 – XT4 | 60