Siemens siprotec 7SA6 User Manual

Control During Operation
7-517SA6 Manual
C53000-G1176-C156-2
7.4.2 Manual Overwriting
When using the Control with Feedback feature, the device checks the feedback in-
dications (i.e. 52-a and 52-b) before and after a control command is issued. If for some
reason, the physical connection from a circuit breaker auxiliary contact to the binary
inputs of the device is broken, inadvertently shorted, or disconnected, commands may
be blocked. If this situation occurs, and the affected switching device is to be operated,
the desired device position indication can be simulated through “manual overwriting”
(Input Tagging). The entered device position indication in the 7SA6 can be used to
simulate and check interlocking conditions.
To accomplish manual overwriting in the 7SA6 the binary inputs of the affected device
must be decoupled first. This decoupling of the system is accomplished by setting the
respective status. The decoupling is discussed in Sub-section 7.4.3.
From the
DeviceFront
To enter the desired position indication for a switching device:
With a 7SA6 ready for operation, first press the key. The
MAIN MENU appears.
Usingthe key,selectthemenuitem
Control andgotothecontrolfunctionswith
the key. The selection
CONTROL appears.
By pressing the key, the
BREAKER/SWITCH sub-menuisentered(seeFigure7-
52).
Select the item
Man. Overwrite using the key, andmovetothenextselection
using the key.
MAN. OVERWRITE appears, as shown in Figure 7-52.
The actual position of each switching device is displayed. Move to the desired switch
using the and keys.
Figure 7-52 Manual Overwriting for Switching Devices from the Front Panel
Enter Password No. 2 (for unlocked switching) and acknowledge with the key.
By pressing the key, a selection window is opened for the marked switch, in
which manual overwriting can be done with the options
OPEN/CLOSE. See Figure 7-
53.
Make the selection using the and keys, and confirm with the key.
Figure 7-53 Selection Window for Manual Overwriting of a Switch Position, Front Panel
MENU
BREAKER/SWITCH 03/04
---------------------
Display —> 1
Control –> 2
>Man. Overwrite –> 3
Set status —> 4
MAN. OVERWRITE 01/03
--------------------
52Breaker >OPEN
Disc.Swit. CLOS
GndSwit. OPEN
ENTER
ENTER
ENTER
MAN. O 01/03
------ >OPEN -------
>52Bre CLOS >OPEN
>Disc. CLOS

Siemens siprotec 7SA6 Specifications

General

Brand	Siemens
Model	siprotec 7SA6
Category	Relays
Language	English