Page 44 - MCCB-XT2-XT4

ABB | SACE Tmax XT

2I Protection Function
If the current of one or more phases exceeds threshold I31 and a trip event is present, the protection
t transmits the TRIP command after a non-programmable fixed time.
I31 2I
To check and simulate the trip times in relation to all the parameters, please consult:
• summary table of the protections with the operating characteristics (page 75)
• the graph with trip curve (page 83)
Parameter Description Default
I Enable Activates/deactivates the protection and its availability in the OFF
parameters menu.
Establishes the value that activates the protection.
Threshold The value is given as both absolute value (A) and relative value (In) and 1,5 In
I31
can be set within the range: 1.5 In to 10 In, in 0.1 In steps
Activates/deactivates the function
NOTE: if at least two of the selectivity S, S2, I, 2I and MCR are
ZoneSelectivity enabled, the input and output are shared with the OR function; it OFF
is sufficient that even a selectivity is activated to stimulate inputs
and outputs

Protection enabling renders 2I Mode section available in Advanced - Functions menu, where the protection
activation event can be configured:
Parameter Description Default
Two alternative modes are available:
• Dependent function: the protection is activated if the programmed
Activation activation event has occurred; this configuration makes the function Dependent
function
and delay parameters available
• Activated: the protection is always activated
The activation event between the input contacts of Ekip Signalling 2K,
the statuses of the unit (open/closed) and the Custom function can
be selected
Function Disabled
NOTE: Ekip Connect allows the Custom function to be
customized so as to associate the activation event with up to
eight statuses in AND or OR configuration
Protection activation delay calculated from the presence of the
activation event onwards.
The value is given in seconds and can be set within range: 0 s to 100 s,
Delay ON 0 s
in 0.01 s steps
NOTE: the protection trips if the event is present for longer than
the set time lag
Protection deactivation delay calculated from disappearance of
activation event onwards.
The value is given in seconds and can be set within range: 0 s to 100 s,
Delay OFF 15 s
in 0.01 s steps
NOTE: protection deactivates if event is not present for longer
than set delay

RELT - Ekip signalling 2K-3
If the RELT module is present a dedicated command (RELT Wizard) will be displayed. This will program the
2I protection and other related parameters; for details see page 155.
Commands by remote control
Two further temporary protection activation/deactivation commands are available when the unit is
connected to one or more Ekip Com modules:
• 2I ON Mode: activates the protection
• 2I OFF Mode: deactivates the protection
For further details consult the document 1SdH002031A1101.
NOTE: if the protection has been activated by command 2I ON Mode, it is deactivated by
command 2I OFF Mode or when the unit shuts down
Signallings
When protection 2I is activated, the message “2I active” appears in the diagnostic bar and in the Alarm List
page, and the alarm led will be on steady.

42 | © 2022 ABB | 1SDH002031A1002 - ECN000212994 Protections | 2 - Standard Protections