Functions
2.2 Protection Data Interfaces and Protection Data Topology
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
82
Principle of function
In the following, the logic is shown in a simplified way:
Figure 2-14
Logic diagram of the test mode
Depending on the way used for controlling the test mode, either the indication Depending on the way used for
controlling the test mode, either the indication
„Test Diff.ONoff“
(No. 3199) or
„TestDiffONoffBI“
(No. 3200) is generated. The way used for deactivating the test mode always has to be identical to the way
used for activating it. The indication
„Test Diff.“
(No. 3190) is generated independently of the selected
way. When deactivating the test mode via the binary inputs, a delay time of 500 ms becomes effective.
The following figures show possible variants for controlling the binary inputs. If a switch is used for the control
(Figure 2-16), it has to be observed that binary input
„>Test Diff. ON“
(No. 3197) is parameterised as NO
contact and that binary input
„>Test Diff. OFF“
(No. 3198) is parameterised as NC contact.
Figure 2-15
Pinciple for external button wiring for controlling the differential protection test mode
Bu1
Button „Deactivating differential protection test mode“
Bu2
Button „Activating differential protection test mode“
Figure 2-16
Priciple for external switch wiring for controlling the differential protection test mode
S
Switch „Activating/deactivating differential protection test mode“
1)
Binary input as NO contact
2)
Binary input as NC contact
