Page 47 - MCCB-XT2-XT4

ABB | SACE Tmax XT

3 - Voltage protections

List The Voltage protections, available by default for the Ekip Hi-Touch and Ekip M Touch models and
configurable in the remaining models as additional SW package, are:
Name Type of protection Page
UV Minimum voltage 45
OV Maximum voltage 46
UV2 Minimum voltage 46
OV2 Maximum voltage 47
Phase Sequence Phase sequence error 47
VU Voltage unbalance 47

UV Protection Function
The protection sends a TRIP command if one or more line-to-line voltages detected by the unit drop
t below threshold U8 for longer than t8.
UV
U8 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 76)
t8 • the graph with trip curve (page 85)
Parameters
v 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
U8 The value is given as both absolute value (Volts) and relative value (Un) 0,9 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
Time t8 5 s
and can 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 70).

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