ABB SACE Tmax XT2 User Manual

1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 63
RQ Protection [2]
Parameter
Description
Default
-Q25
Threshold
Defines the reactive power value for which the protection is
activated and which is necessary for defining the relative TRIP area
The value is expressed both as an absolute value (kVAR) and as a
relative value (Sn), settable in a range:
0.1 Sn .. 1 Sn with 0.001 Sn step
NOTE: threshold expressed in Sn is not preceded by the
sign “-” but must be understood to be reversed reactive
power
0.11 Sn
Time t24
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range:
0.05 s .. 100 s, with 0.1 s step
100 s
Vmin
Threshold
This is the minimum voltage for activating the protection. If at least
one network voltage below the threshold Vmin is present, the
protection is not active.
The value is expressed both as an absolute value (Volt) and as a
relative value (Un), settable in a range:
0.5 Un .. 1.2 Un with 0.01 Un step
0.5 Un
Constraints, limitations, and additional functions
 Ekip Touch accepts parameters with the following limitations: Q24 < Q25 and Kq < Kq2
 From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, see page70.
Cos φ
The trip occurs when the value of total Cos φ falls below the threshold set.
Total cos φ is calculated as the ratio of Total Active Power to Total Apparent Power.
Parameters
The parameters are available in the Advanced - Alerts menu (page 27):
Parameter
Description
Default
Enable
Activates/deactivates protection and availability of protection threshold on
menu
OFF
Threshold
Defines the value that activates the protection; it is settable in a range:
0.5 .. 0.95 with 0.01 step
0.9

ABB SACE Tmax XT2 Specifications

General

Brand	ABB
Model	SACE Tmax XT2
Category	Circuit breakers
Language	English