Siemens siprotec 7SA6 User Manual

Functions
6-1797SA6 Manual
C53000-G1176-C156-2
6.12.2 Applying the Function Parameter Settings
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.
6.12.3 Settings
Note: The indicated secondary current values for setting ranges and default settings
refer to I
N
= 1 A. For the nominal current 5 A the current values are to be multiplied
by 5.
6.12.4 Information Overview
Addr. Setting Title Setting Options Default Setting Comments
2401 FCT SOTF-O/C ON
OFF
ON Inst. High Speed SOTF-O/C is
2404 I>>> 1.00..25.00 A 2.50 A I>>> Pickup
F.No. Alarm Comments
4253 >BLOCK SOTF-O/C >BLOCK Instantaneous SOTF Overcurrent
4271 SOTF-O/C OFF SOTF-O/C is switched OFF
4272 SOTF-O/C BLOCK SOTF-O/C is BLOCKED
4273 SOTF-O/C ACTIVE SOTF-O/C is ACTIVE
4281 SOTF-O/C PICKUP SOTF-O/C PICKED UP
4282 SOF O/CpickupL1 SOTF-O/C Pickup L1
4283 SOF O/CpickupL2 SOTF-O/C Pickup L2
4284 SOF O/CpickupL3 SOTF-O/C Pickup L3
4295 SOF O/CtripL123 SOTF-O/C TRIP command L123

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English