ABB SACE Emax 2 Series Operating Instructions Manual page 93

RC Protection
t
Idn
tdn
90 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
Function
Rc protection protects against the residual current earth faults by detecting the fault current with the
appropriate external Rc toroid.
Rc
The protection sends a TRIP command if the current from toroid Rc exceeds threshold Idn for longer than
Tdn.
To check and simulate the trip times in relation to all the parameters, please consult:
• summary table of the protections with the operating characteristics (page 95)
• the graph with trip curve (page 103)
I
Parameters
Parameter Description
Defines the value that activates the protection; the value is given
Threshold Idn
in amperes and can be set within a range of values from 3 A to 30
A
This is the trip time of the protection; the value is given in
Time Tdn seconds and can be set within a range of values from 0.05 s to
0.8 s
Limitations and additional functions
Ekip Touch activates and displays the Rc protection parameters if the following conditions are observed:
• Rating Plug Rc model assembled and installed
• Measurement module assembled and installed
protection activation includes checking for the presence of toroid Rc and signaling on the diagnosis bar
in the event of alarm/absence
ABB | SACE Emax 2
Default
3 A
0,06 s
Ekip Touch - Protections
9 - Additional protections and functions