ABB SACE Tmax XT2 User Manual page 41

G Protection [2] Ekip M Touch
G protection of the Ekip M Touch differs with the other models in the following ways:
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Constraints, limitations, and additional functions
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Function
MCR Protection
The protection is active for a calculated period of time starting from the change of state open 
closed, then it turns off.
If during this period the current of one or more phases exceeds the I3 threshold, after a fixed time
that cannot be programmed the protection sends the TRIP command.
To verify and simulate the trip times based on all the parameters, see:
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Parameters
Parameter
Enable
Threshold I3
Monitor time
Constraints, limitations, and additional functions
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1SDH002031A1002 ECN000092998
BlockOnStartUp block enabled and cannot be changed (see page 78)
StartUp Time cannot be changed and set with the value of Motor StartUp (depending on
the trip class, see page 66)
Curve set as t = k not changeable
2
With curve t = k/I the trip time is forced to t4 if the calculations result in a theoretical value
that is lower than t4 itself
With CB size 100A, without Vaux and with threshold I4 < 25 A, the threshold itself is forced
to 25 A and the display shows the error Configuration
without Vaux and with time t4 < 100 ms, the time itself is forced to 100 ms and the display
shows the error Configuration
depending on the set threshold I4, the protection is deactivated for Ig greater than:
8 In with threshold I4  0.8 In;
I4 >0.2 In
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions and the selectivity type, see page70.
Protection summary table with the operating characteristics (page 78)
Chart with tripping curve (page 85)
NOTE: to activate MCR, the I protection must be disabled
Description
Enables/disables protection and availability on menu of the
parameters
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
Defines the interval of time in which the MCR protection is active,
calculated from the open  closed status change
The value is expressed in seconds, which are settable in a range:
0.04 s .. 0.5 s with 0.01 s step
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions and the selectivity type, see page70.
Rev. B
6 In with 0.8 In > I4  0.5 In; 4 In 0.5 > In  0.2 In; 2 In with
Default
OFF
6 In
0.04 s
SACE Tmax XT2 – XT4 | 41