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SOTF control
The SOTF control is activated when
CB_CL_CMD
circuit breaker closing command input
is activated. The module is kept active until the set
SOTF reset time
is exceeded after the
CB_CL_CMD is deactivated. The
TRIP
output is activated when a fault indication signal
is received from the Trigger module while the SOTF control is still active.
5.8.5
Application
The
CB_CL_CMD
input activates SOTF. In the standard configuration, the breaker close
command should be connected to this input. The
SOTF reset time
setting parameter is used
for keeping SOTF active for a certain time after the CB close command is executed.
The overcurrent high and instantaneous signals, for example, the 50P-3
PICKUP
signal is
connected to the function
PICKUP
input. When the SOTF control module is active and the
PICKUP
input is activated, the function trips instantaneously without any delays.
The overcurrent low stage signals, for example, 51P
PICKUP
signal is connected to the
function
PICKUP_DLYD
input. The setting parameter
Trip delay time
is used to delay the
operation in case of inrush situation.
5.8.6
Signals
Table 726:
SOTF Input signals
Name
Type
Default
Description
PICKUP
BOOLEAN
0=False
Pickup from function to be accelerated by SOTF
PICKUP_DLYD
BOOLEAN
0=False
Pickup from function to be accelerated with delay by
SOTF
CB_CL_CMD
BOOLEAN
0=False
External enabling of SOTF by CB close command
BLOCK
BOOLEAN
0=False
Block of function
Table 727:
SOTF Output signals
Name
Type
Description
TRIP
BOOLEAN
Trip
5.8.7
Settings
Table 728:
SOTF Group settings (Basic)
Parameter
Values (Range)
Unit
Step
Default
Description
Trip delay time
0...60000
ms
1
0
Time delay for pickup input
1MAC059074-MB A
Section 5
Protection related functions
615 series ANSI
833
Technical Manual
Содержание Relion 615 series
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