Page 71 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
5 - Frequency protections

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 Type of protection Page
UF Minimum frequency 69
OF Maximum frequency 70
UF2 (1) Minimum frequency 70
OF2 (1) Maximum frequency 71

(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 Function
The protection sends a TRIP command if the grid frequency read by the unit drops below threshold f12 for
t longer than t12.
UF
f12 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:
t12 • summary table of the protections with the operating characteristics (page 93)
• the graph with trip curve (page 105)
f Parameters
Parameter Description Default
Activates/deactivates the protection and its availability in the
Enable OFF
parameters menu
Activates/deactivates transmission of the open command: if disabled,
Trip Enable the alarm and exceedance of protection time are only managed as OFF
information
Establishes the value that activates the protection.
Threshold f12 The value is given as both absolute value (Hertz) and relative value (Fn) 0,9 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 seconds and
Time t12 3 s
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 83).

69 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Protections | 5 - Frequency protections