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ABB | SACE Tmax XT
50 | © 2020 ABB | 1SDH001821A1002 - ECN000135670 Protections | 7 - Standard Protections
2I Protection
2I
I31
t
I
Function
If the current of one or more phases exceeds threshold I31 and a trip event is present, the protection
transmits the TRIP command after a non-programmable fixed time.
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 87)
• the graph with trip curve (page 96)
Parameter Description Default
Enable
Activates/deactivates the protection and its availability in the
parameters menu.
OFF
Threshold I31
Establishes the value that activates the protection.
The value is given as both absolute value (A) and relative value (In) and
can be set within the range: 1.5 In to 15 In, in 0.1 In steps
1,5 In
ZoneSelectivity
Activates/deactivates the function
NOTE : if at least two of the selectivity S, S2, I, 2I and MCR are
enabled, the input and output are shared with the OR function; it
is sufficient that even a selectivity is activated to stimulate inputs
and outputs OFF
Protection enabling makes the
2I Mode
section available in the
Advanced - Functions
menu, where the
protection activation event can be configured:
Parameter Description Default
Activation
Two alternative modes are available:
• Dependent function: the protection is activated if the programmed
activation event has occurred; this configuration makes the function
and delay parameters available
• Activated: the protection is always activated
Dependent
function
Function
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
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
Disabled
Delay
Protection activation delay calculated from the presence of the
activation event onwards.
The value is given in seconds and can be set within the range: 0 s to
100 s, in 0.1 s steps
NOTE : the protection trips if the event is present for longer than
the set time lag
0 s
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 170.
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.