ABB SACE Emax 2 Series - Page 60

ABB | SACE Emax 2
Ekip Touch - Protections
2 - Standard Protections
57 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
S Protection
S
I2
t
t2
I
Function
If the current of one or more phases exceeds threshold I2, 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 101)
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 I2
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: 0.6 In to 10 In, in 0.1 In steps
2 In
Time t2
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:
0.05 s to 0.8 s, in 0.01 s steps
0.1 s
Thermal
memory
Activates/deactivates the thermal memory function (page 83)
NOTE:the function is only available with curve t=k/I
2
OFF
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: 0.6 In to 10 In, in 0.1 In steps
0,6 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
Limitations and additional functions
• threshold I2 must be higher than threshold I1 (if S protection is activated)
• in the presence of curve t= k/I
2
, the protection trip time is forced to t2 if the calculation results
give a theoretical value lower than t2 itself
• the block functions and type of selectivity can also be accessed by means of the service connector
(via Ekip Connect) or communication via system bus (page 83)
• with CB in UL standard configuration, the maximum value of t2 is 400 ms