ABB SACE Tmax XT2 User Manual

1SDH002031A1002 ECN000092998 Rev. B SACE Tmax XT2 – XT4 | 46
15 - Voltage Protections
List
The Voltage 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
UV
Minimum voltage
46
OV
Maximum voltage
47
UV2
Minimum voltage
47
OV2
Maximum voltage
48
Sequenza fasi
Incorrect phases sequence
48
VU
Voltage unbalance
49
UV Protection
Function
If one or more line-to-line voltages read by the unit falls below the U8 threshold for a time greater
than t8, the protection sends the TRIP command.
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 87)
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
U8
Defines the value that activates the protection.
The value is expressed both as an absolute value (Volt) and as a
relative value (Un), settable in a range: 0.05 Un .. 1 Un with 0.01
Un step
0.9 Un
Time t8
This is the trip time of the protection; the value is expressed in
seconds, which are settable in a range: 0.05 s ..120 s, with 0.01 s
step
5 s
Constraints, limitations, and additional functions
From the service connector (with Ekip Connect) or with system bus connection 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