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Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
278
3.3.12
Trip and Close Test with the Circuit Breaker
The circuit breaker and tripping circuits can be conveniently tested by the device 7SD80.
The procedure is described in detail in the SIPROTEC 4 System Description.
If the check does not produce the expected results, the cause may be established from the text in the display
of the device or the PC. If necessary, the connections of the circuit breaker auxiliary contacts must be checked:
It must be noted that the binary inputs used for the circuit breaker auxiliary contacts must be assigned sepa-
rately for the CB test. This means it is not sufficient that the auxiliary contacts are allocated to the binary inputs
FNo. to , 379 and 380 (according to the possibilities of the auxiliary contacts); additionally, the corresponding
FNo. to or 410 and/or 411 must be allocated (according to the possibilities of the auxiliary contacts. In the CB
test only the latter ones are analyzed. See also Section 2.12. Furthermore, the ready state of the circuit breaker
for the CB test must be indicated to the binary input with FNo. 371.
3.3.13
Switching Check for the Configured Equipment
Switching via Command Input
If the configured equipment was not switched sufficiently in the hardware test already described, configured
equipment must be switched on and off from the device via the integrated control element. The feedback infor-
mation on the circuit breaker position injected via binary inputs is to be read out at the device and compared
with the actual breaker position.
The switching procedure is described in the SIPROTEC 4 System Description (Order no. E50417-H1176-
C151) The switching authority must be set in correspondence with the source of commands used. With the
switch mode it is possible to select between interlocked and non-interlocked switching. Note that non-inter-
locked switching constitutes a safety risk.
Switching from a Remote Control Center
If the device is connected to a remote substation via a system (SCADA) interface, the corresponding switching
tests may also be checked from the substation. Please also take into consideration that the switching authority
is set in correspondence with the source of commands used.