1SDH002031A1002 ECN000092998 Rev. B
SACE Tmax XT2
– XT4 | 40
G Protection
Function
Ekip Touch executes the vectorial sum of the phase currents (L1, L2, L3, Ne) obtaining the
internal ground fault current (I
g
): if the current I
g
exceeds the I4 threshold the protection is
activated and, after a time determined by the value detected and the parameters set, it sends the
TRIP command.
To verify and simulate the trip times based on all the parameters, see:
Protection summary table with the formulas for calculations (page 78)
Chart with tripping curve (page 86, 86)
Parameters
Parameter
Description
Default
Enable
Enables/disables protection and availability on menu of the parameters
OFF
Trip Enable
Activates/deactivates the open command: if disabled, the alarm and the
lapsing of the protection time are managed only as information
ON
Function
Determines the curve dynamic and threshold or the calculation of trip time:
t= k: trip at set time
t= k/I
2
: dynamic inverse time-delay trip
t= k
Threshold I4
Defines the value that activates protection and contributes to calculating
trip time.
The value is expressed both as an absolute value (Ampere) and as a
relative value (In), settable in a range:
0.1 In .. 1In with 0.001 In step
0.2 In
Time t4
On the basis of the selection of the curve type, it is the trip time and
contributes to calculating timing.
The value is expressed in seconds, which are settable in a range:
0.1 s .. 1 s with 0.05 s step
NOTE: with curve:
t= k
,
t4
can also be configured as:
instantaneous
; in this mode the trip time is comparable with the
trip time declared for protection I, see page 78 for details
0.4 s
Pre-alarm I4
Enables a warning to be sent that the measured current is near the
threshold triggering the protection.
The value is expressed as a percentage of the threshold I1, which is
settable in a range: 50 % I4 .. 90 % I4, with 1 % step
The pre-alarm threshold is deactivated in two cases:
current below pre-alarm threshold I4
current above threshold I4
90 % I4
Zone
Selectivity
Activates/deactivates the function and the display availability of selectivity
time, see page 70 for details
NOTE: the function is available only with curve t = k
OFF
Selectivity
time
This is the trip time of the protection with the zone selectivity function active
and the selectivity input not present see page 70 for details
The value is expressed in seconds, setting in a range:
0.04 s .. 0.2 s with 0.01 s step
0.04 s
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:
0.2 In .. 1In with 0.1 In step
0.2 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
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 ...
