Page 88 - Sace Emax 2 Manual for design engineers

P. 88

Continued from the previous page ABB | SACE Emax 2
Protection configuration is available in the Advanced menu (page 44)
Parameter Description Default
Activates/deactivates the protection and its availability in the
Enable OFF
parameters menu
Activates/deactivates transmission of the open command: if disabled,
Trip Enable the alarm and exceedance of protection time are only managed as ON
information
Establishes curve dynamics and the threshold or trip time calculation:
Curve • t= k: fixed time trip t = k
• t= k/I : inverse time-delay dynamic trip
2
Establishes the value that activates the protection and contributes
towards calculating the trip time.
Threshold I41 0,2 In
The value is given as both absolute value (Amperes) and relative value
(In) and can be set within the range: 0.1 In to 1 In, in 0.001 In steps
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:
Time t41 • 0.05 s to 1 s, in 0.05 s steps for t=k 0,4 s
• 0.1 s to 1 s, in 0.05 s steps for t=k/I 2
with CB in UL configuration, the maximum settable value of t41
is 0.4 s
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
Threshold I41 the range 50% I41 to 90% I41, in 1% steps. 90 % I41
The prealarm condition deactivates in two cases:
• current lower than prealarm threshold I41
• current higher than threshold I41
Activates/deactivates the function and selectivity time availability on
the display (1)
NOTES :
• the function is only available with curve t = k
ZoneSelectivity OFF
• if both selectivities G and MDGF are activated, the input and
output are shared with the OR function: it is sufficient for even
only one of the two to be activated to stimulate the inputs and
outputs
This is the trip time of the protection with the zone selectivity function
activated and selectivity input not present (1)
Selectivity time 0,04 s
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
Activates/deactivates the function and availability of the associated
StartUp enable OFF
parameters on the display (2)
Protection threshold valid during Startup time, in the conditions in
StartUp which the function is activated (2) 0,2 In
Threshold The value is given as both absolute value (Amperes) and relative value
(In) and can be set within the range: 0.2 In to 1 In, in 0.1 In steps
This is the time for which the StartUp threshold remains activated and
is calculated from the moment the activation Threshold is exceeded (2)
StartUp Time 0.1 s
The value is given in seconds and can be set within the range: 0.1 s to
30 s, in 0.01 s steps

(1) details on page 80
(2) details on page 83
Limitations and additional functions
• in the presence of curve t= k/I , the protection trip time is forced to t41 if the calculation results give a
2
theoretical value lower than t41 itself
• Ekip Touch activates and displays MDGF protection parameters if the presence of toroid MDGF has been
enabled in the Settings menu (page 46);
• 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 82)
• with CB in UL standard configuration, some parameters have different maximum values: I41 maximum =
1200A, Startup maximum = 1200A, t41 maximum = 400ms

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