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Circuit-Breaker Test
The 7SD80 differential protection enables the trip circuits and circuit breakers to be tested conveniently.
For the test, a 3-pole TRIP/CLOSE cycle and the close command
CB1-TEST close
(7329) are performed via
the test program.
The output indication
CB1-TESTtripABC
(7328) must be routed to the command relays used to control the
circuit-breaker coils.
The test is started using the operator panel on the front of the device or using the PC with DIGSI. The proce-
dure is described in detail in the SIPROTEC 4 System Description.
sequence of one TRIP-CLOSE test cycle. The set times are those stated in Section
Command Duration” and “Circuit-breaker Test”.
If the circuit-breaker auxiliary contacts forward the CB position to the device via binary inputs, the test cycle
can only be initiated when the circuit breaker is closed.
The information on the circuit-breaker position is not automatically derived from the position logic according
to the above section. For the circuit-breaker test, there are separate binary inputs for position feedback. These
must be taken into consideration when routing the binary inputs.
The device generates indications that show the corresponding test status.
[ein-aus-pruefzyklus-wlk-170902, 1, en_US]
Figure 2-63
TRIP-CLOSE test cycle
Information List
No.
Information
Type of
Informa-
tion
Comments
-
CB1tst ABC
-
CB1-TEST trip/close Phases ABC
7328
CB1-TESTtripABC
OUT
CB1-TEST TRIP command ABC
7329
CB1-TEST close
OUT
CB1-TEST CLOSE command
7345
CB-TEST running
OUT
CB-TEST is in progress
7346
CB-TSTstop FLT.
OUT_Ev
CB-TEST canceled due to Power Sys. Fault
7347
CB-TSTstop OPEN
OUT_Ev
CB-TEST canceled due to CB already OPEN
7348
CB-TSTstop NOTr
OUT_Ev
CB-TEST canceled due to CB was NOT READY
7349
CB-TSTstop CLOS
OUT_Ev
CB-TEST canceled due to CB stayed CLOSED
7350
CB-TST .OK.
OUT_Ev
CB-TEST was succesful
2.12.3
2.12.4
Functions
2.12 Circuit Breaker Test
146
SIPROTEC 4, 7SD80, Manual
E50417-G1100-C474-A2, Edition 02.2018
Summary of Contents for SIPROTEC 4 7SD80
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