ABB SACE Tmax XT2 User Manual page 73

Trip Only From service connector (with Ekip Connect) or with system bus communication it is possible to
Forward and configure D protection (if available and enabled) with 2 further parameters:

Backward

A malfunction in the opposite direction is only managed for alarm information.
From service connector (with Ekip Connect) or with system bus communication, for S, S2, G, D
Type of
selectivity protections (if available and enabled) it is possible to configure the zone selectivity inputs and
some outputs:


Startup The function, which can be activated for S, I, G, S2, D, and UP protections (if available and
enabled), allows modifying the protection threshold (StartUp threshold) for a period set by the
user (Startup time).
The period is activated when a threshold is exceeded (activation threshold), programmable by
the user with Ekip Connect or system bus, valid and verified for all phase currents.
The Startup condition is extinguished after the Startup time and is reactivated the next time the
activation threshold is exceeded.
Below is a graphical representation with S protection:
Figure 25
1SDH002031A1002 ECN000092998
Trip only Forward: if activated, D protection manages opening commands only if a forward
direction is detected
Trip only Backward: if activated, D protection manages opening commands only if a
backward direction is detected
Standard: operation as per standard zone selectivity logic (default configuration)
Custom: in this mode it is possible to select the activation event of the zone selectivity input
or output.
IMPORTANT: in the Custom configuration the only event to activate zone
selectivity is the one set, and therefore the standard selectivity operation is not
active (change recommended only for expert technical staff)
NOTE: for UP protection the startup is to be understood as the during which the
protection is disabled
NOTE: startup does not reoccur while at least one current remains above the activation
threshold level
Rev. B
SACE Tmax XT2 – XT4 | 73