Page 59 - MCCB-XT2-XT4

Continued from the previous page ABB | SACE Tmax XT
Parameter Description Default
StartUp Activates/deactivates the function and availability of the associated OFF
enable parameters on the display
Protection threshold valid during Startup time, in the conditions in
StartUp (2)
Threshold which the function is activated and with forward current direction . 2 In
Fw (2) The value is given as both absolute value (amperes) and relative value
(In) and can be set within the range: 0.6 In to 10 In, in 0.1 In steps
Protection threshold valid during Startup time, in the conditions in
StartUp which the function is activated and with backward current direction.
Threshold The value is given as both absolute value (amperes) and relative value 2 In
Bw (2)
(In) and can be set within the range: 0.6 In to 10 In, in 0.1 In steps
This is the time for which the StartUp threshold remains activated and
StartUp Time is calculated from the moment the activation Threshold is exceeded
(2) The value is given in seconds and can be set within the range: 0.1 s to 0.1 s
30 s, in 0.01 s steps
Ekip Touch calculates the phase displacement angle between active
and apparent power measured: when phase displacement exceeds
Direction Min
Angle the set Direction Min Angle parameter, the unit considers the fault 3,6 °
direction to have been identified. The value is given in degrees and can
be set within a range of 15 values from 3.6° to 69.6°

(1) details on page 68
(2) details on page 70

Limitations and additional functions
the functions blocking the type of selectivity and the Trip only Forward and Trip Only Backward parameters
can also be accessed by means of the service connector (via Ekip Connect) or communication via system
bus (page 70).
Notes
• activation of D directional protection automatically activates the alarm that monitors phase
sequence (which can also be excluded and activated in the manual mode): note how, in the case
of a cyclic sequence of phases that differs from the set value, in the event of a fault the directional
protection inverts the reference direction with respect to the expected direction; details of the
phase sequence protection are available on page 47
• in the case of small overcurrents, the behavior of the directional protection is influenced by the
type of load: to prevent the direction of the fault current from being incorrectly interpreted in the
case of capacitive loads, it is advisable for the setting of that protection to be made on the basis
of real fault conditions and not overloads

57 | © 2022 ABB | 1SDH002031A1002 - ECN000212994 Protections | 6 - Power protections