ABB XT7, Руководство по эксплуатации и обслуживанию

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ABB | SACE Tmax XT
68 | © 2020 ABB | 1SDH001821A1002 - ECN000135670 Protections | 11 - Power protections
Continued from the previous page
Parameters
Parameter Description Default
Enable
Activates/deactivates the protection and its availability in the parameters
menu
OFF
Trip Enable
Activates/deactivates transmission of the open command: if disabled, the
alarm and exceedance of protection time are only managed as information
OFF
Threshold Kq
Defines the gradient of the line relating to threshold Q24.
The value is given as absolute value (slope of the line) and can be set within
the range: -2 to 2 in 0.01 steps
-2
Threshold
-Q24
This is the reactive power required to define the trip line and relative TRIP
area
The value is given as both absolute value (kVAR) and relative value (Sn) and
can be set within the range: 0.1 Sn to 1 Sn in 0.001 Sn steps
NOTE : the threshold expressed in Sn is not preceded by the “-” sign,
but should still be understood as inverse reactive power
0,1 Sn
Threshold
Kq2
Defines the gradient of the line relating to threshold Q24.
The value is given as absolute value (slope of the line) and can be set within
the range: -2 to 2 in 0.01 steps
2
Threshold
-Q25
Defines the reactive power value at which the protection trips and is
required for the purpose of defining the relative TRIP area
The value is given as both absolute value (kVAR) and relative value (Sn) and
can be set within the range: 0.1 Sn to 1 Sn in 0.001 Sn steps
NOTE : the threshold expressed in Sn is not preceded by the “-” sign,
but should still be understood as inverse reactive power
0,11 Sn
Time t24
This is the trip time of the protection; the value is given in seconds and can
be set within a range: 0.5 s to 100 s, in 0.1 s steps
100 s
Threshold
Vmin
This is the minimum activation voltage of the protection. The protection is
not activated if at least one line-to-line voltage value is less than threshold
Vmin.
The value is given as both absolute value (Volts) and relative value (Un) and
can be set within the range: 0.5 Un to 1.2 Un in 0.01 Un steps
0.5 Un
Limitations and additional functions
• Ekip Touch accepts parameters in accordance with the following limitations: Q24 < Q25 and Kq < Kq2
• the block functions can also be accessed by means of the service connector (via Ekip Connect) or by
connection to the system bus (page 78).
Cos
φ
Protection
The protection activates an alarm when the total Cos
φ
value drops below the set threshold.
Total cos
φ
is calculated as ratio between total active Power and total apparent Power.
Parameters
The parameters are available in the Advanced - Signaling menu (page 35)
Parameter Description Default
Enable
Activates/deactivates the protection and availability of the threshold in the
menu
OFF
Threshold
Defines the value that activates the protection; can be set within the range:
0.5 to 0.95 in 0.01 steps
0,95