ABB SACE Emax E2.2 - Page 63

ABB | SACE Emax 2
Ekip Touch - Protections
2 - Standard Protections
60 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
G Protection
G
I4
t
t4
I
Function
Ekip Touch calculates the vector sum of the phase currents (L1, L2, L3, Ne) and obtains the internal earth
fault current (Ig): if current Ig exceeds threshold I4, the protection trips and, after a time established by
the value read and by the parameter settings, transmits the TRIP command.
To check and simulate the trip times in relation to all the parameters, please consult:
• the summary table of the protections with the calculation formulas (page 95)
• the graph with trip curve (page 103)
Parameters
Parameter Description Default
Enable
Activates/deactivates the protection and its availability in the
parameters menu.
OFF
Trip Enable
Activates/deactivates transmission of the open command. If
disabled, the alarm and exceedance of protection time are only
managed as information.
ON
Curve
Establishes curve dynamics and the threshold or trip time
calculation:
• t = k: fixed time trip
• t = k/I
2
: inverse time-delay dynamic trip
t = k
Threshold I4
Establishes the value that activates the protection and
contributes towards calculating the trip time.
The value is given as both absolute value (A) and relative value (In)
and can be set within the range: 0.1 In to 1 In, in 0.001 In steps
0,2 In
Time t4
It is the trip time or contributes towards timing calculation,
depending on the type of curve selected.
The value is given in seconds and can be set within the range: 0.1
s to 1 s, in 0.05 s steps
NOTE: in the presence of curve: t = k, t4 can also be
configured as: instantaneous; in this mode, the trip time is
comparable to that given for I protection (page 95)
0.1 s
Prealarm I4
Warns that the measured current is near to the protection
activation threshold.
The value is given in percentage of threshold I1 and can be set
within the range 50% I4 to 90% I4, in 1% steps.
The prealarm condition deactivates in two cases:
• current lower than prealarm threshold I4
• current higher than threshold I4
90 % I4
ZoneSelectivity
Activates/deactivates the function and selectivity time availability
on the display (page 83)
NOTE: the function is only available with curve t = k
OFF
Selectivity time
This is the trip time of the protection with the zone selectivity
function activated and selectivity input not present (page 83)
The value is given in seconds and can be set within the range:
0.04 s to 0.2 s, in 0.01 s steps
0,04 s
StartUp enable
Activates/deactivates the function and availability of the
associated parameters on the display (page 86)
OFF
StartUp
Threshold
Protection threshold valid during Startup time, in the conditions
in which the function is activated (page 86)
The value is given as both absolute value (A) and relative value (In)
and can be set within the range: 0.2 In to 1 In, in 0.02 In steps
0,2 In
StartUp Time
This is the time for which the StartUp threshold remains
activated, as calculated from the moment the activation
Threshold is exceeded (page 86)
The value is given in seconds and can be set within the range: 0.1
s to 30 s, in 0.01 s steps
0.1 s
Continued on the next page