ABB SACE Tmax XT2 - Page 42

1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 42
2I Protection
Function
If the current of one or more phases exceeds the I31 threshold and the activation event is
triggered, after a non-programmable fixed time the protection sends the TRIP command.
To verify and simulate the trip times based on all the parameters, see:
 Protection summary table with the operating characteristics (page 78)
 Chart with tripping curve (page 85)
Parameters
Parameter
Description
Default
Enable
Activate/deactivate protection and availability of protection
threshold on menu
OFF
Threshold
I31
Defines the value that activates the protection.
The value is expressed both as an absolute value (Ampere) and as
a relative value (In), settable in a range:
1.5 In .. 15In with 0.1 In step
1.5 In
Enabling protection makes the 2I Mode section available in the Advanced - Functions menu,
where the protection activation event can be configured:
Parameter
Description
Default
Activation
Two modes are available that are alternatives to one another:
 Dependent function: the protection is active if the
programmed activation even has occurred; this
configuration makes the function and delay parameters
available.
 Active: the protection is always active
Dependent
function
Function
The activation event can be selected from the input contacts of
Ekip Signalling 4K and Ekip Signalling 2K, the unit status
(open/closed) and the Custom function
NOTE: Ekip Connect enables the Custom function to be
customized to combine the activation event with up to
eight statuses in AND or OR configuration
Disabled
Delay
Protection activation delay calculated from the presence of the
activation event.
The value is expressed in seconds, settable in a range:
0 s .. 100 s, with 0.1 s step.
NOTE: the protection is activated if the event is present
for a time greater than the set delay
0 s
Remote commands
With the Trip unit connected to an Ekip Com module, two additional commands for temporarily
activating/deactivating the protection remotely are available:
 2I Mode ON: activates the protection
 2I Mode OFF: deactivates the protection
Refer to the 1SDH002031A1101 unit System Interface for details.
NOTE: if the protection has been activated by command 2I Mode ON, it is deactivated
with command 2I Mode OFF or when the unit is switched off
Alerts
With the 2I protection active, the message "2I active" appears in the diagnosis bar and on the
Alarm List page, and the alarm LED is lit and fixed.