Page 65 - Sace Emax 2 Manual for design engineers

ABB | SACE Emax 2
OV Protection Function
The protection sends a TRIP command if one or more line-to-line voltages detected by the unit exceed
t threshold U9 for longer than t9.
U9 OV 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 93)
• the graph with trip curve (page 103)
t9
Parameters
V Parameter Description Default
Activates/deactivates the protection and its availability in the parameters
Enable OFF
menu
Activates/deactivates transmission of the open command: if disabled, the
Trip Enable OFF
alarm and exceedance of protection time are only managed as information
Establishes the value that activates the protection.
Threshold U9 The value is given as both absolute value (Volts) and relative value (Un) and 1,05 Un
can be set within the range: 1 Un to 1.5 Un in 0.001 Un steps
This is the trip time of the protection; the value is given in seconds and can
Time t9 5 s
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 80).

UV2 Protection Function
UV2 protection functions in the same way as UV protection: the protection sends a TRIP command if one or
t more line-to-line voltages detected by the unit drop below threshold U15 for longer than t15.
UV2
U15 It is independent of UV protection, thus thresholds and functions of the two protections can be programmed
so as to take advantage of different plant solutions (example: signaling with UV and open command with UV2
t15 or vice versa, or both for signaling or tripping).
To check and simulate the trip times in relation to all the parameters, please consult:
v • summary table of the protections with the operating characteristics (page 93)
• the graph with trip curve (page 102)
Parameters
Parameter Description Default
Activates/deactivates the protection and its availability in the parameters
Enable OFF
menu
Activates/deactivates transmission of the open command: if disabled, the
Trip Enable OFF
alarm and exceedance of protection time are only managed as information
Establishes the value that activates the protection.
Threshold The value is given as both absolute value (Volts) and relative value (Un) and 0,9 Un
U15
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 t15 5 s
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 80).

63 | © 2020 ABB | 1SDH001330R1002 - ECN000134959 - Rev. A Ekip Touch - Protections | 3 - Voltage protections