ABB SACE Tmax XT5 Operation And Maintenance Manual page 65

OQ Protection
t
OQ
Q27
t27
OP Protection
t
OP
P26
t26
63 | © 2019 ABB | 1SDH002039A1002 - ECN000093027 - Rev. A
Function
The protection sends a TRIP command if one or more of the reactive power values detected by the unit
exceed threshold Q27 for longer than t27.
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 93)
Parameters
Q
Parameter Description
Activates/deactivates the protection and its availability in the
Enable
parameters menu
Activates/deactivates transmission of the open command: if disabled,
Trip Enable the alarm and exceedance of protection time are only managed as
information
Establishes the value that activates the protection.
Threshold Q27 The value is given as both absolute value (kVAR) and relative value
(Sn) and can be set within the range: 0.4 Sn to 2 Sn in 0.001 Sn steps
This is the trip time of the protection; the value is given in seconds and
Time t27
can be set within a range: 0.5 s to 100 s, in 0.5 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).
Function
The protection sends a TRIP command if one or more of the active power values detected by the unit exceed
threshold P26 for longer than t26.
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 93)
Parameters
P
Parameter Description
Activates/deactivates the protection and its availability in the
Enable
parameters menu
Activates/deactivates transmission of the open command: if disabled,
Trip Enable the alarm and exceedance of protection time are only managed as
information
Establishes the value that activates the protection.
Threshold P26 The value is given as both absolute value (kW) and relative value (Sn)
and can be set within the range: 0.4 Sn to 2 Sn in 0.001 Sn steps
This is the trip time of the protection; the value is given in seconds and
Time t26
can be set within a range: 0.5 s to 100 s, in 0.5 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).
ABB | SACE Tmax XT
Default
OFF
OFF
1 Sn
1 s
Default
OFF
OFF
1 Un
1 s
Protections | 5 - Power protections