Additional Protections - ABB SACE Emax 2 Installation, Operation And Maintenance Instructions
Low voltage air circuit-breakers
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Additional protections The Ekip T&P and Ekip Bluetooth modules, and the Ekip Connect software, allow you to set some protections
42 | © 2014 ABB | 1SDH000999R0002 - L8569
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 L
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
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