Functions
2.16 Function Control and Circuit Breaker Test
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011
236
2.16.2 Circuit Breaker Test
The 7SD610 line protection relay allows for convenient testing of the trip circuits and the circuit breakers.
2.16.2.1 Functional Description
The test programs shown in Table 2-10 are available. The single-pole tests are of course only possible if the
device you are using is capable of single-pole tripping.
The output alarms mentioned must be allocated to the relevant command relays that are used for controlling
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 procedure
is described in detail in the SIPROTEC 4 System Description. Figure 2-109 shows the chronological sequence
of one TRIP–CLOSE test cycle. The set times are those stated in Section 2.1.2.1 for „Trip Command Duration“
and „Circuit Breaker Test“.
Where the circuit breaker auxiliary contacts indicate the status of the circuit breaker or of its poles to the device
via binary inputs, the test cycle can only be initiated if the circuit breaker is closed.
The information regarding the position of the circuit breakers is not automatically derived from the position logic
according to the above section. For the circuit breaker test function (auto recloser) there are separate binary
inputs for the switching status feedback of the circuit breaker position. These must be taken into consideration
when allocating the binary inputs as mentioned in the previous section.
The alarms of the device show the respective state of the test sequence.
Table 2-10 Circuit breaker test programs
Figure 2-109 TRIP-CLOSE test cycle
Serial
No.
Test Programs Circuit
Breaker
Output Indications (No.)
1 1-pole TRIP/CLOSE-cycle phase L1
CB 1
CB1-TESTtrip L1 (7325)
2 1-pole TRIP/CLOSE-cycle phase L2 CB1-TESTtrip L2 (7326)
3 1-pole TRIP/CLOSE-cycle phase L3 CB1-TESTtrip L3 (7327)
4 3-pole TRIP/CLOSE-cycle CB1-TESTtrip 123 (7328)
Associated close command CB1-TEST CLOSE (7329)
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