Checking Analog Outputs; Tests For The Circuit Breaker Failure Protection - Siemens siprotec 7SA6 User Manual

Test of the LED's
Updating the
Display
Ending the
Procedure
8.3.4

Checking Analog Outputs

8.3.5

Tests for the Circuit Breaker Failure Protection

7SA6 Manual
C53000-G1176-C133-1
q
The response of the device must be checked in the ,VW–column of the dialogue
box. To do this, the dialogue box must be updated. The options may be found below
under the margin heading "Updating the Display".
If however the effect of a binary input must be checked without carrying out any
switching in the plant, 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 nr. 6 has been entered, all binary inputs are separated from the plant and
can only be activated via the hardware test function.
q
Terminate the test sequence (see above under the margin heading „Ending the
Procedure").
The LED's 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 frunction. This implies that no LED can be switched on anymore by e.g.
a protection function or operation of the LED reset key.
When the dialog box +DUGZDUH 7HVW is opened, the present conditions of the
hardware components at that moment are read in and displayed. An update occurs:
− for each harware component, if a command to change the condition is successfully
performed,
− for all hardware components if the 8SGDWH button is clicked,
− for all hardware components with cyclical updating if the $XWRPDWLF 8SGDWH
VHF field is marked.
To end the hardware test, click on &ORVH. The dialog box closes. The device becomes
unavailable for a brief start-up period immediately after this. Then all hardware
components are returned to the operating conditions determined by the plant settings.
7SA6 can be equipped with up to 2 analog outputs. In case analog outputs are
available and used, their effect must be tested.
Since different measured values or results of the fault location are output, the check
depends on the values used. They must be generated, e.g. with a secondary test
equipment.
Please make sure that the corresponding values are output correctly at their
destination.
If the device provides a breaker failure protection and if this is used, the integration of
this protection function in the system must be tested under practical conditions.
Installation and Commissioning
8-45