Checking For Breaker Failure Protection - Siemens SIPROTEC 4 7VK61 Manual

coming from a protection function or a control command from the operator panel to an output relay cannot
be executed.
Proceed as follows in order to check the output relay:
•
Make sure that the switching operations caused by the output relays can be executed without any danger
(see above under DANGER!).
•
Each output relay must be tested via the corresponding Scheduled field of the dialog box.
•
Finish the testing (see margin heading below "Exiting the Procedure"), so that during further testings no
unwanted switchings are initiated.
Test of the binary inputs
To test the wiring between the plant and the binary inputs of the 7VK61the condition in the system which
initiates the binary input must be generated and the response of the device checked.
To do so, open the dialog box Hardware Test again to view the physical position of the binary input. The pass-
word is not yet required.
Proceed as follows in order to check the binary inputs:
•
Each state in the system which causes a binary input to pick up must be generated.
•
Check the reaction in the Status column of the dialog box. To do this, the dialog box must be updated.
The options may be found below under the margin heading "Updating the Display".
•
Finish the test sequence (see margin heading below "Exiting the Procedure").
If, however, the effect of a binary input must be checked without carrying out any switching in the system, it
is possible to trigger individual binary inputs with the hardware test function. As soon as the first state change
of any binary input is triggered and the password No. 6 has been entered, all binary inputs are separated from
the system and can only be activated via the hardware test function.
Test of the LEDs
The light-emitting diodes (LEDs) may be tested in a similar manner to the other input/output components. As
soon as the first state change of any LED has been triggered, all LEDs are separated from the internal device
functionality and can only be controlled via the hardware test function. This means e.g. that no LED is illumi-
nated anymore by a protection function or by pressing the LED reset button.
Updating the Display
When the dialog box Hardware Test is opened, the present conditions of the hardware components at that
moment are read in and displayed.
An update is made:
•
For the particular hardware component, if a command for change to another state was successful,
•
For all hardware components if the Update button is clicked,
•
For all hardware components with cyclical updating (cycle time is 20 sec) if the Automatic Update (20
sec) field is marked.
Exiting the Procedure
To end the hardware test, click on Close. The dialog box closes. Thus, all the hardware components are set
back to the operating state specified by the plant states. The processor system is restarted, then the device is
ready for operation.
3.3.5

Checking for Breaker Failure Protection

General
If the device is equipped with the breaker failure protection and this function is used, the integration of this
protection function into the system must be tested under practical conditions.
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
Mounting and Commissioning
3.3 Commissioning
213