ABB SACE Tmax XT7 Operation And Maintenance Manual page 49

I Protection
t
I3
47 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
Function
If the current of one or more phases exceeds threshold I3, the protection trips and, after a non-programmable
fixed time, transmits the TRIP command.
I
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)
Parameters
I
Parameter Description
Activates/deactivates the protection and its availability in the
Enable
parameters menu.
Establishes the value that activates the protection.
The value is given as both absolute value (A) and relative value (In) and
Threshold I3
can be set within the range: 1.5 In to 15 In, in 0.1 In steps
Activates/deactivates the function
ZoneSelectivity
Activates/deactivates the function and availability of the associated
StartUp enable
parameters on the display (page 77)
Protection threshold valid during Startup time, in the conditions in
which the function is activated (page 77)
StartUp
Threshold 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
This is the time for which the StartUp threshold remains activated and
is calculated from the moment the activation Threshold is exceeded
StartUp Time (page 77)
The value is given in seconds and can be set within the range: 0.1 s to
30 s, in 0.01 s steps
Ekip M Touch
With Ekip M Touch, I protection is inhibited for 100 ms if the currents detected by the Trip unit cross zero
when at least one is present (0.25 In fixed control threshold).
Limitations and additional functions
• threshold I3 must be higher than threshold I2 (if S and I protections are activated)
• I protection can be activated with MCR protection disabled
• the block functions can also be accessed by means of the service connector (via Ekip Connect) or
communication via system bus (page 78)
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
ABB | SACE Tmax XT
Default
ON
4 In
OFF
OFF
1,5 In
0.1 s
Protections | 7 - Standard Protections