1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 39
I Protection
Function
If the current of one or more phases exceeds the I3 threshold, the protection is activated and,
after a fixed time that cannot be programmed, it 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
Enables/disables protection and availability on menu of the
parameters
OFF
Threshold I3
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 .. 10In with 0.1 In step
4 In
StartUp
Enable
Activates/deactivates the function and display availability of the
combined parameters, see page 73 for details
OFF
StartUp
threshold
Protection threshold valid during Startup time, in conditions in which
the function is active, see page 73 for details
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
StartUp time
This is the time for which the StartUp threshold is active, calculated
from tripping of activation threshold, set details on page 73
The value is expressed in seconds, which are settable in a range:
0.1 s .. 30 s, with 0.01 s step
0.1 s
Ekip M Touch
With Ekip M Touch the I protection is inhibited for 100 ms if the currents detected by the Trip unit
pass from none to at least one present (fixed control threshold at 0.25 In).
Constraints, limitations, and additional functions
The I3 threshold must be greater than the I2 threshold (if the S and I protections are active)
I protection can be enabled with MCR protection disabled
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, see page 70
Summary of Contents for SACE Tmax XT2
Page 84: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 84 L curve Ekip M Touch S curve t k I2 ...
Page 86: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 86 G curve t k I2 G curve t k ...
Page 87: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 87 IU curve UV curve UV2 curve ...
Page 88: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 88 OV curve OV2 curve VU curve ...
Page 89: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 89 S V curve S2 V curve RV curve ...
Page 90: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 90 UF curve UF2 curve OF curve OF2 curve ...
Page 91: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 91 RP curve D curve ...
Page 92: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 92 OQ curve OP curve ...
Page 93: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 93 UP curve RQ curve ...
Page 94: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 94 ROCOF curve R JAM curve R STALL ...
Page 95: ...1SDH002031A1002 ECN000092998 Rev B SACE Tmax XT2 XT4 95 UC curve ...
