ABB | SACE Tmax XT
Protections | 11 - Power protections
63 | © 2020 ABB | 1SDH001821A1002 - ECN000135670
11 - Power protections
List
The Power protections, available by default for the Ekip Hi-Touch, Ekip G Touch, Ekip G-Hi Touch and Ekip M
Touch models and configurable in the remaining models as additional SW package, are:
Name
Type of protection
Page
RP
Reverse active power
D
(2)
Directional short-circuit with adjustable delay
OQ
(1)
Maximum reactive power
OP
(1)
Active overpower
UP
(1)
Active underpower
RQ
(1)(2)
Reverse reactive power
Cos
φ
Minimum Cos
φ
(1)
protection not available by default with Ekip Hi-Touch and Ekip M Touch. However, it can be integrated by
requesting the relative SW package
(2)
protection not available by default with Ekip G Touch. However, it can be integrated by requesting the relative
SW package
WARNING! The
Power flow
parameters effect the sign of the power and power factor
values measured by the unit.
Power flow
must be configured and verified on the
basis of your installation to ensure that all the protections of the
Power Protections
package function correctly
RP Protection
P11
t
t11
P
RP
Function
The protection sends a TRIP command if the reverse total active power exceeds threshold P11 for longer
than t1.
To check and simulate the trip times in relation to all the parameters, please consult:
• summary table of the protections with the operating characteristics (page 88)
• the graph with trip curve (page 103)
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 f11
Establishes the value that activates the protection.
The value is given as both absolute value (kW) and relative value (Sn) and
can be set within the range: -0.05 Sn to -1 Sn in 0.001 Sn steps
NOTE:
the threshold expressed in Sn is preceded by the “-” sign to
indicate that inverse power is involved
0,1 Sn
Time t11
This is the trip time of the protection; the value is given in seconds and
can be set within a range: 0.05 s to 120 s, in 0.01 s steps
10 s
Limitations and additional functions
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).
