Page 138 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
Zone Selectivity with SACE With SACE Emax 2 circuit-breakers, Zone Selectivity can be implemented:
Emax 2 circuit-breakers • If the circuit-breakers are equipped with Ekip LCD or Touch trip units (including Hi-, G, and G Hi- trip units).
• For protections S, I, G, D, 2I, MCR, S2, Gext, MDGF (availability depends on the trip unit model).
Hardware Selectivity operation is the same as that described in the previous section for SACE circuit-breakers
other than Emax2, except for the addition of S2, Gext and MDGF in the list of protections supported.
NOTE: S2, Gext and MDGF share the same selectivity inputs/outputs of S (S2) and G (Gext
and MDGF), respectively. If several protections are active with the same channels (e.g.:
S and S2) the trip unit controls the inputs and outputs with OR logic: configure the parameters
with care to avoid undesired signals or actions.
Logic Selectivity, which is available in the presence of Ekip Link modules, has different advantages:
• Each protection is independent. There are no cases of shared or exclusive channels/bits (example: selectivity
D can be actuated without disabling protections S and G).
• Each device connected to Link Bus can be customized with many propagation parameters, mask, diagnosis.
Use of both types of selectivity or just logic selectivity can be selected on trip unit for each protection.
NOTE: for details on how to associate trip units connected to the same Link Bus, see the
chapter "9 - Ekip Link”.

Logic selectivity: setting
For each protection for which you wish to implement Zone Selectivity, you must set the function enabling
among the available parameters. Then, in addition to these parameters, the selectivity time is also activated
for the setting.
Otherwise, Zone Selectivity can only be set up via the Ekip Connect software. Specifically:
• Logic selectivity can be implemented for a maximum of 12 of the 15 actors (trip units) that can be associated
to the trip unit via Link Bus (see the chapter "9 - Ekip Link").
• Only hardware selectivity or mixed selectivity (hardware and logic) must be selected in the Ekip Link
advanced selectivity page.
• The IP address of each actor present must be entered in the Ekip Link configuration. Entry of the
address enables the configuration parameters and state indicators to be displayed in the various pages
(see the chapter "1 - Power Controller").
• For each actor associated to the trip unit via Link Bus and for which you want to enable Logic Selectivity,
the function must be enabled (the value “True” must be assigned to the Selectivity Actor parameter).
• Selectivity masks are available for each actor present in the Ekip Link advanced selectivity page: the
mask enables selection of the protections of the actors (S, G, D-Forward, D-Backward, S2, Gext, MDGF)
that activate the selectivity input of the trip unit (example: actor 1, protection mask S = S2: selectivity S
of the trip unit will be active in the presence of signals S2 of actor 1).
• If selectivity has been enabled for protection S and the protection itself is in the alarm state, the following
are activated on the output: the S/D-Forward hardware signal and logic selectivity bit S.
In addition, with reference to the example, the circuit-breaker opening time varies on the basis of the state of
the selectivity inputs and/or state bits:
• if hardware signal S/D-Forward (SZi) and logic selectivity bits S2 and Gext of actor 1 are not active: the
circuit-breaker is open during the selectivity time for protection S.
• if hardware signal S/D-Forward (SZi) or, with mixed selectivity, logic selectivity bits S2 or Gext of actor
1 are active: the circuit-breaker is open during S protection time (if S protection is still in the alarm state
once this time has elapsed).
IMPORTANT: if hardware-only selectivity is selected, the logical selectivity bits are
ignored in input, but they are however activated in output.

NOTE: the S/D-Forward (G/D-Backward) hardware output is activated only if the protections
S or D-Forward (G or D-Backward) are in alarm, and the S/D-Forward (G/D-Backward)
hardware input acts as a block only for the protections S and D-Forward (G and D-Backward),
regardless of whether hardware-only or mixed selectivity is selected.

Continued on the next page

136 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Additional functions | 1 - Zone Selectivity