Voltage Protections - ABB SACE Tmax XT2 User Manual

15 - Voltage Protections

The Voltage protections available by default for Ekip Hi-Touch and Ekip M Touch models and
List
configurable on the remaining models as an additional software package, are:
Name
UV
OV
UV2
OV2
Sequenza fasi
VU
Function
UV Protection
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:


Parameters
Parameter
Enable
Trip Enable
Threshold
U8
Time t8
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.
1SDH002031A1002 ECN000092998
Type of protection
Minimum voltage
Maximum voltage
Minimum voltage
Maximum voltage
Incorrect phases sequence
Voltage unbalance
Protection summary table with the operating characteristics (page 79)
Chart with tripping curve (page 87)
Description
Enables/disables protection and availability on menu of the
parameters
Activates/deactivates the open command: if disabled, the alarm
and the lapsing of the protection time are managed only as
information
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
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
Rev. B
Page
46
47
47
48
48
49
Default
OFF
OFF
0.9 Un
5 s
SACE Tmax XT2 – XT4 | 46