ABB SACE Emax E1.2 Operating Instructions For The Design Engineer page 164

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Continued from the previous page
• In the page Ekip Link Enhanced Selectivity, the selection masks also include the State A and State
B programmable logic bits of the trip unit. Therefore, for each trip unit protection that can be blocked (S
protection in the example), these bits too can also act as a block.
NOTE: the programmable logic bits are bits of the trip unit, each of which can be linked to
one of the 15 actors associated to the trip unit via Link Bus, and programmed to be activated
for any combination of the status bits of the associated actor. The Programmable Logic
function is independent of the Zone Selectivity functions; for details see the chapter "14 - Ekip
Link module".
Additional functions: repetition of selectivity information
In the Ekip Link Configuration page, the Repeat Configuration mask allows you to select the protections
for which you wish the logic selectivity bits to be activated even if the protections are not in alarm. Therefore,
regarding the example in question, if the S2 or Gext logical selectivity bits of actor 1 are active, the logic
selectivity bit S is activated even if S protection is not in alarm.
NOTE: the Repeat Configuration mask does not activate the hardware outputs.
Additional functions: diagnostics
In the presence of both hardware and logical selectivity, diagnostics highlights any cabling error of the
hardware selectivity signals by comparing the de-activated hardware selectivity signals with the activated
logical selectivity bits.
Diagnostics can be activated in the Ekip Link Diagnostic Configuration page, where you can set the time
interval for performing it. For each associated actor for Zone Selectivity one or both hardware inputs can be
selected (example: for actor 2, the S/D-Forward input).
Then:
• A check is performed on the hardware inputs at regular intervals.
• If a hardware input is inactive (for example: S/D-Forward), a check is performed through diagnostics on
the logical selectivity bits of the actors associated to this input (in the example, the logical selectivity bits
of actor 2).
• If one of these bits is active, a line error is displayed in the Ekip Link Status page for each of these
actors (in the example, for actor 2 the S/D-Forward line error is displayed).
Error signals
• Independently of the diagnostics, if a hardware input is active and none of the logical selectivity bits of the
associated actors is active, a line inconsistency is signalled for this input in the Ekip Link Status page.
NOTE: to check the line inconsistency, all the actors associated with the trip unit are checked,
including those for which the function has not been enabled (i.e. the value "True" was not
assigned to the Selectivity Actor parameter).
• A line error (detected via diagnostics) is indicative of a possible wiring error (for example: physical
disconnection).
• Therefore, hardware selectivity can be disabled by not wiring the blocking outputs and inputs and not
enabling diagnostics (disabled by default).
• A line inconsistency (independently of diagnostics) is indicative of a possible configuration error (for example:
a hardware input of the trip unit is connected to the hardware output of a trip unit not associated via Link
Bus, or to an actor for which the function has not been enabled).
• Therefore, to avoid a line inconsistency being reported, the trip units whose hardware outputs are connected
to the hardware inputs of the trip unit must also be connected to the Link Bus and associated to the trip
unit (see the chapter "14 - Ekip Link module") while it is not necessary (it is not necessary for the value
"True" to be assigned to the Selectivity Actor parameter).
ABB | SACE Emax 2
Specific applications | 1 - Zone Selectivity