ABB SACE Emax E1.2, Operating Instructions For The Design Engineer

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ABB | SACE Emax 2
88 | © 2017 ABB | 1SDH001330R0002 - ECN000058721 Rev. A Ekip Touch protection trip unit | 11 - Hi-Touch protections
Hi- versions: additional
functions
Functions
For some protections there are functions available that extend the functionality:
Protection S2 D UV2 OV2 UF2 OF2
Trip Enable x x x x x
Zone Selectivity x
StartUp enable x x
Directional Zone Selectivity x
Blocks x x x x x
Trip enable
It disables the opening command in order to use the protection as an alarm signal, without opening commands.
Zone Selectivity
The function allows multiple circuit-breakers in the same installation to be connected together, in order to
coordinate the trip units and to reduce the tripping times in the case of S2 protection.
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.
For further details see the chapter "Specific applications" on page 156.
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.
NOTE:
for protection D the startup thresholds are available for both forward and backward
direction.
Directional Zone Selectivity
The function allows, as with Zone Selectivity, multiple circuit-breakers in the same installation to be connected
together, in order to coordinate the trip units and reduce tripping times, but with some important differences:
• It is to be used in installations with loop circuit.
• It allows tripping to be managed and coordinated according to the power flows (determined by the direction
of the current), in order to minimize dispersion of energy.
NOTE: Directional Zone Selectivity works as an alternative to S and G Zone Selectivity.