Applying The Function Parameter Settings; Settings; Information Overview - Siemens SIPROTEC 7SA6 Manual

6.12.2 Applying the Function Parameter Settings

6.12.3 Settings

Addr. Setting Title
2401 FCT SOTF-O/C
2404 I>>>

6.12.4 Information Overview

F.No. Alarm
4253 >BLOCK SOTF-O/C
4271 SOTF-O/C OFF
4272 SOTF-O/C BLOCK
4273 SOTF-O/C ACTIVE
4281 SOTF-O/C PICKUP
4282 SOF O/CpickupL1
4283 SOF O/CpickupL2
4284 SOF O/CpickupL3
4295 SOF O/CtripL123
7SA6 Manual
C53000-G1176-C156-2
A prerequisite for the operation of the switch-on-to-fault protection is that in address
124 SOTF Overcurr. = Enabled was set during the configuration of the device
scope of functions (Section 5.1). It is furthermore possible to switch the function, in ad-
dress 2401 , SOTF Overcurr. ON or OFF .
The magnitude of the current which causes pick-up of the switch on to fault function is
set as I>>> in address 2404 . The setting value should be selected large enough to
ensure that the protection under no circumstances picks up due to an overload condi-
tion or due to a current increase resulting from e.g. an automatic reclosure dead time
on a parallel feeder. It is recommended to set at least 2.5 times the rated current of
the feeder.
Note: The indicated secondary current values for setting ranges and default settings
refer to I = 1 A. For the nominal current 5 A the current values are to be multiplied
N
by 5.
Setting Options
ON
OFF
1.00..25.00 A
>BLOCK Instantaneous SOTF Overcurrent
SOTF-O/C is switched OFF
SOTF-O/C is BLOCKED
SOTF-O/C is ACTIVE
SOTF-O/C PICKED UP
SOTF-O/C Pickup L1
SOTF-O/C Pickup L2
SOTF-O/C Pickup L3
SOTF-O/C TRIP command L123
Default Setting
ON Inst. High Speed SOTF-O/C is
2.50 A I>>> Pickup
Comments
Functions
Comments
6-179