ABB | SACE Tmax XT
Protections | 4 - Frequency protections
57 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
4 - Frequency protections
Elenco
The Frequency 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
UF
Minimum frequency
OF
Maximum frequency
UF2
(1)
Minimum frequency
OF2
(1)
Maximum frequency
(1)
protections UF2 and OF2 are not available by default with Ekip G Touch. However, they can be integrated by
requesting the relative SW package
UF Protection
f12
t
t12
f
UF
Function
The protection sends a TRIP command if the grid frequency read by the unit drops below threshold f12 for
longer than t12.
The protection excludes itself if the maximum value of the line-to-line voltage is less than 30 V.
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 80)
• the graph with trip curve (page 91)
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 f12
Establishes the value that activates the protection.
The value is given as both absolute value (Hertz) and relative value (Fn)
and can be set within the range: 0.9 Fn to 1 Fn in 0.001 Fn steps
0,9 Fn
Time t12
This is the trip time of the protection; the value is given in seconds and
can be set within a range: 0.06 s to 300 s, in 0.01 s steps
3 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 75).
