ABB | SACE Emax 2
Ekip Touch protection release | 9 - Touch protections
93 | © 2013
ABB |
1SDH001000R0002 - L7804
Iinst
The purpose of this protection is to maintain the integrity of the circuit-breaker and installation in
the case of particularly high current values requiring shorter reaction times than those provided
by the instantaneous short-circuit-protection.
The protection cannot be disabled, and the tripping threshold and time are defined by ABB.
Additional functions
Functions
For some protections there are functions available that extend the functionality:
Protection
L
S
I
G
IU
T
Thermal memory
x
x
Trip Enable
x
x
x
x
Zone selectivity
x
x
Startup Enable
x
x
x
Thermal Memory
This function reduces the tripping time of the protection based on the time elapsed between
multiple trips caused by heating of the cables.
IMPORTANT: the parameter can be activated if the function of the selected
protection is t=k/i
2
.
Trip Enable
Disables the trip command, in order to use the protection as an alarm signal, without any
opening commands.
Zone Selectivity
The function allows multiple circuit-breakers belonging to the same installation to be connected
together, in order to coordinate the releases and to reduce the tripping times in the case of
protections S and G.
The function allows circuit-breakers to be coordinated so that, in the event of a failure:
• The circuit-breaker closest to the fault trips.
• The other circuit-breakers are locked for a programmable time.
Startup Enable
The function allows you to modify the threshold of the protection for a period that can be set
by the user. The period is activated when a threshold is exceeded (Startup Threshold), which
can be programmed by the user via Ekip Connect software.
IMPORTANT:
•
Startup can be activated with a fixed time protection function (t=k).
•
The I3 startup threshold must be higher than the I2 startup threshold.