Siemens siprotec 7SD5 User Manual

3 Mounting and Commissioning
514
7SD5 Manual
C53000-G1176-C169-1
3.3.16 Trip and Close Test with the Circuit Breaker
The circuit breaker and tripping circuits can be conveniently tested by the device
7SD5.
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 separately for the CB test. This means it is not sufficient that the
auxiliary contacts are allocated to the binary inputs No. 351 to 353, 379 and 380 (ac-
cording to the possibilities of the auxiliary contacts); additionally, the corresponding
No. 366 to 368 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 2.23.1. Furthermore, the ready state of the circuit breaker for the CB test must
be indicated to the binary input with No. 371.
3.3.17 Trip/Close Tests for the Configured Operating Devices
Switching by Local
Command
If the configured operating devices were not switched sufficiently in the hardware test
already described, all configured switching devices must be switched on and off from
the device via the integrated control element. The feedback information of the CB po-
sition injected via binary inputs should be read out and compared with the actual
breaker position. For devices with graphic display this is easy to do with the control
display.
The switching procedure is described in the SIPROTEC
®
4 System Description.
Switching authority must be set in accordance with the command source used. With
the switching mode, you can choose between locked and unlocked switching. In this
case, you must be aware that unlocked switching is a safety risk.
Switching from a
Remote Control
Centre
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.
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Siemens siprotec 7SD5 Specifications

General

Brand	Siemens
Model	siprotec 7SD5
Category	Relays
Language	English