Voltage Protections - ABB SACE Tmax XT5 Operation And Maintenance Manual

2 - Voltage protections

UV Protection
t
U8
t8
50 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Elenco The Voltage protections, available by default for the Ekip Hi-Touch, Ekip G Touch, Ekip G-Hi Touch and Ekip
M Touch models and configurable in the remaining models as additional SW package, are:
Name
UV
OV
UV2
(1)
OV2
(1)
Phase sequence
VU
(1)
protections UV2 and OV2 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 one or more line-to-line voltages detected by the unit drop below
threshold U8 for longer than t8.
UV
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 80)
• the graph with trip curve (page 88)
Parameters
v
Parameter Description
Activates/deactivates the protection and its availability in the parameters
Enable
menu
Activates/deactivates transmission of the open command: if disabled, the
Trip Enable
alarm and exceedance of protection time are only managed as information
Establishes the value that activates the protection.
Threshold U8 The value is given as both absolute value (Volts) and relative value (Un) and
can be set within the range: 0.05 Un to 1 Un in 0.001 Un steps
This is the trip time of the protection; the value is given in seconds and can
Time t8
be set within a range: 0.05 s to 120 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 75).
Type of protection
Minimum voltage
Maximum voltage
Minimum voltage
Maximum voltage
Phase sequence error
Voltage unbalance
ABB | SACE Tmax XT
Page
50
51
51
52
52
52
Default
OFF
OFF
0,9 Un
5 s
Protections | 2 - Voltage protections