Page 87 - Sace Emax 2 Manual for design engineers

Continued from the previous page ABB | SACE Emax 2
Parameter Description Default
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 Gext 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 page83
Limitations and additional functions
• in the presence of curve t= k/I2, the protection trip time is forced to t41 if the calculation results give a
theoretical value lower than t41 itself
• Ekip Touch activates and displays Gext protection parameters if the presence of toroid S.G.R has been
enabled in the Settings menu (page 46);protection activation includes checking for the presence of toroide
S.G.R and signaling on the diagnosis bar in the event of alarm/absence
• the protection is automatically inhibited by the unit if absence of toroid S.G.R is detected
• 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

MDGF Protection Function
MDGF protection protects against earth faults and detects the fault current with a dedicated toroid MDGF.
t if MDGF toroid current exceeds threshold I41, the protection trips and, after a time established by the value
I41 MDGF
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:
t41 • summary table of the protections with the operating characteristics (page 92)
• the graph with trip curve (page 101)
I Parameters
Sensor configuration is available in the Settings menu (page 46)
Parameter Description Default
External Toroid It allows the presence of toroid MDGF to be activated OFF

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85 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Protections | 9 - Additional protections and functions