Frequency Protections - ABB SACE Emax 2 Series Operating Instructions Manual

5 - Frequency protections

UF Protection
t
f12
t12
72 | © 2023 ABB | 1SDH001330R1002 - ECN000297030
List The Frequency protections, available by default for Ekip Hi-Touch, Ekip G Touch, Ekip G-Hi Touch models
and configurable in the remaining models as additional SW package, are:
Name
UF
OF
UF2
(1)
OF2 (1)
(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
Function
The protection sends a TRIP command if the grid frequency read by the unit drops below threshold f12
for longer than t12.
UF
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 96)
• the graph with trip curve (page 108)
f Parameters
Parameter Description
Activates/deactivates the protection and its availability in the
Enable
parameters menu
Activates/deactivates transmission of the open command: if
Trip Enable disabled, the alarm and exceedance of protection time are only
managed as information
Establishes the value that activates the protection.
The value is given as both absolute value (Hertz) and relative
Threshold f12
value (Fn) and can be set within the range: 0.9 Fn to 1 Fn in 0.001
Fn steps
This is the trip time of the protection; the value is given in
Time t12
seconds and can be set within a range: 0.06 s to 300 s, in 0.01 s
steps
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 86).
Type of protection
Minimum frequency
Maximum frequency
Minimum frequency
Maximum frequency
ABB | SACE Emax 2
Page
72
73
73
74
Default
OFF
OFF
0,9 Fn
3 s
Ekip Touch - Protections
5 - Frequency protections