Hi-Touch Protections; Presentation - ABB SACE Emax E1.2 Operating Instructions For The Design Engineer

11 - Hi-Touch protections

Presentation Hi-Touch protections are available for Ekip Hi-Touch and Ekip G Hi-Touch trip units.
81 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A
List of protections
The following is a list of the Hi-Touch protections:
Symbol Protection against
S2
Short-circuit with adjustable delay
D Directional short-circuit with adjustable delay
UV2 Minimum voltage
OV2 Maximum voltage
UF2 Minimum frequency
OF2 Maximum frequency
Set A-B Double configuration of the protections
Operating principle
The protections have a series of parameters available allowing the user to adjust the activation thresholds and
the opening times of the circuit-breaker.
The operating principle of all the protections is similar: if the current, voltage or frequency signal exceeds the
set protection threshold, the specific protection will enter the alarm condition and will begin to delay.
The duration of the delay depends on the threshold and time parameters set, and depending on the dynamic
of the signal we can have two behaviours:
• If the alarm condition persists, the trip unit opens the circuit-breaker.
• If the signal drops below the protection threshold, the trip unit exits from the alarm condition, interrupts
the delay and doesn't open the circuit-breaker.
The protection thresholds are distinguished by type:
• The current protections are related to the rated size of the Rating Plug (In).
• The voltage protections are related to the rated size of the voltage line-to-line set on the trip unit (Un).
• The frequency protections are related to the frequency set on the trip unit (fn).
IMPORTANT:
• To manage the circuit-breaker tripping with a specific protection, the protection itself
must be enabled and, if supported, must have the Trip Enable parameter activated.
• All the protections have a default configuration: if enabled, check the parameters and
make the necessary changes according to the requirements of your installation.
ABB | SACE Emax 2
Ekip Touch protection trip unit | 11 - Hi-Touch protections