Additional Protections - ABB SACE Emax 2 Series Installation, Operation And Maintenance Instructions

Additional protections The Ekip T&P and Ekip Bluetooth modules, and the Ekip Connect software, allow you to set
43 | © 2013 ABB | 1SDH001000R0002 - L7804
some protections not available via dip-switch:
• Thermal Memory
• Protection T
• Prealarm Threshold
• Hardware trip
Thermal Memory
This function, available for protections L and S, reduces the tripping time of the protection
based on the time elapsed between multiple trips caused by heating of the cables.
IMPORTANT: for the protection S the function can be activated if the selected
curve is time-dependent.
Protection T
The protection T protects the circuit-breaker against abnormal temperatures recorded by the
protection release.
The protection T is always active; via Ekip Connect it is possible to enable tripping, which takes
place for temperatures t < -25 °C or t > 85 °C.
Prealarm
The prealarm L notifies that the current measured is close to the activation threshold of the
protection L.
The prealarm threshold is expressed as a percentage value of the I1 threshold, and is adjustable
between 40% and 90% (default value).
Example: with I1 = 0.6 In and prealarm threshold = 50%, the prealarm is activated for currents
greater than 0.3 In
The prealarm state is activated for currents higher than the threshold set, and is deactivated
for:
• current less than the prealarm threshold.
• current greater than the activation threshold of protection L.
Hardware Trip
The Hardware trip protection protects against internal disconnections of the circuit-breaker.Via
Ekip Connect it is possible to enable the trip command, which is sent if one or more of the
following events is detected:
• Current sensors disconnected (internal or external if enabled)
• Rating Plug disconnected
• Trip Coil disconnected
• Internal problems with the protection release.
IMPORTANT: the protection trips if the error conditions persist more than 1
second.
ABB | SACE Emax 2
Ekip Dip protection release | 2 - Protections