Siemens SIPROTEC 4 7SD80 User Manual

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. Figure 2-63 shows the chronological
sequence of one TRIP-CLOSE test cycle. The set times are those stated in Section 2.1.3.1 Setting Notes for “Trip
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

Siemens SIPROTEC 4 7SD80 Specifications

General

Brand	Siemens
Model	SIPROTEC 4 7SD80
Category	Power distribution unit
Language	English