Ekip Touch - Additional Functions; Zone Selectivity - ABB SACE Emax 2 Series Operating Instructions Manual

Ekip Touch - Additional functions

1 - Zone Selectivity

Description Zone Selectivity is an evolution of time selectivity (see chapter "5 - Selectivity between ABB SACE circuit-
Zone Selectivity with ABB
SACE circuit-breakers
138 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
breakers"), in which a dialog is created between the trip units through input and output blocking signals:
an active input blocking signal means that the circuit-breaker must remain closed.
In detail. If a release with the function enabled detects a higher fault current than the threshold set for
a certain protection, it activates the lock signal relating to that protection on the output and, before
opening, makes sure that the corresponding lock signal is present on the input:
• If the input is not active, the release opens with a delay equal to the selectivity time set for the
protection (which must be less than that of the protection trip).
• If the input is active, it opens only if the fault persists and with a delay equal to the tripping time
of the protection.
Zone Selectivity can be enabled via cabling (Hardware Selectivity) with ABB SACE circuit-breakers, not
Emax 2, where available.
Besides Hardware Selectivity, SACE Emax 2 circuit-breakers allow Logic Selectivity to be configured using
the communication via Link Bus between releases equipped with Ekip Link module. For further details,
consult paragraph "Zone Selectivity with SACE Emax 2 circuit-breakers".
With electronic trip units not for ABB SACE Emax 2:
• Zone selectivity can be implemented only for protections S I G and D (Directional).
• If the function is available, the circuit-breaker is equipped with two blocking outputs and two
blocking inputs that is, one output and one input for each S, I and G protection), or as an alternative
two outputs and two inputs for protection D (one output and one input per direction).
• Since only two blocking outputs and two blocking inputs are available, Zone Selectivity for protections
S, I and G and Directional Zone Selectivity are mutually excluding (to implement Directional Zone
Selectivity, the S, I and G protections must be disabled, and vice versa).
• To actuate Zone Selectivity, the releases must be equipped with auxiliary voltage to activate the
outputs.
• Zone selectivity for S and I protection share the same restrain signal
• Each S G and D protection has two selectivity parameters: the function enabling parameter and
selectivity time, meaning the opening time of the circuit-breaker if the selectivity input is not active.
• For I protection the selectivity time is fixed (without possibilty to modify the value).
• The blocking outputs and inputs are considered active if the level is high (equal to the auxiliary
voltage).
• For protection D, the selectivity time to be set is the same for both directions.
To obtain Zone Selectivity, the protections must be set, and the blocking outputs and must be wired,
so that only those circuit-breakers capable of isolating the overload or fault without the rest of the
installation being de-energized open. Regarding this:
• For each type of selectivity, definitions, operating principles, application fields, advantages and
disadvantages, requirements, indications for setting the protections and examples are provided
in the Technical Application Paper QT1
breakers
• For Directional Selectivity, application examples are available in the White Paper
"Directional protection and directional zone selectivity".
1SDC007100G0205 Low voltage selectivity with ABB circuit-
Ekip Touch - Additional functions
ABB | SACE Emax 2
1SDC007401G0201
1 - Zone Selectivity