ABB SACE Tmax XT2 User Manual

1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 54
17 - Frequency Protections
List
The Frequency protections available by default for Ekip Hi-Touch and Ekip M Touch models and
configurable on the remaining models as an additional software package, are:
Name
Type of protection
Page
UF
Minimum frequency
54
OF
Maximum frequency
55
UF2
Minimum frequency
55
OF2
Maximum frequency
56
UF Protection
Function
If the grid frequency read by the Trip unit falls below the f12 threshold for a time greater than t12,
the protection sends the TRIP command.
The protection automatically cuts out if the maximum line-to-line voltage value is less than 30 V.
To verify and simulate the trip times based on all the parameters, see:
 Protection summary table with the operating characteristics (page 79)
 Chart with tripping curve (page 90)
Parameters
Parameter
Description
Default
Enable
Enables/disables protection and availability on menu of the
parameters
OFF
Trip Enable
Activates/deactivates the open command: if disabled, the alarm
and the lapsing of the protection time are managed only as
information
OFF
Threshold
f12
Defines the value that activates the protection.
The value is expressed both as an absolute value (Hertz) and as a
relative value (Fn), settable in a range:
0.9 Fn .. 1 Fn with 0.001 Fn step
0.9 Fn
Time t12
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range:
0.06 s .. 300 s, with 0.01 s step
3 s
Constraints, limitations, and additional functions
From the service connector (with Ekip Connect) or with system bus communication it is also
possible to access the block functions, see page70.

ABB SACE Tmax XT2 Specifications

General

Brand	ABB
Model	SACE Tmax XT2
Category	Circuit breakers
Language	English