Siemens siprotec 7SA522 User Manual

3.3 Commissioning
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7SA522 Manual
C53000-G1176-C155-3
sive underreach (see “Check at Permissive Underreach Scheme”); however the re-
ceived signal causes a direct trip.
For remote transmission, the external command input is employed on the receiving
line end; it is therefore a prerequisite that: '77'LUHFW7ULS is set to (QDEOHG in
address  and )&7'LUHFW7ULS to 21 at adddress . If the signal transmis-
sion path is the same and has already been checked as part of the previous subsec-
tions, it need not be checked again here. A function check is sufficient, whereby the
externally derived command is executed. For this purpose the external tripping event
is simulated and the response of the circuit breaker at the opposite line end is verified.
3.3.16 Testing User-defined Functions
The device has a vast capability for allowing functions to be defined by the user, es-
pecially with the CFC logic. Any special function or logic added to the device must be
checked.
Naturally, a general procedure is not available. Configuration of these functions and
the set associated conditions must be actually known beforehand and tested. Possible
interlocking conditions of switching devices (circuit breakers, disconnectors, earth
switch) are of particular importance. They must be considered and tested.
3.3.17 Trip and Close Test with the Circuit Breaker
The circuit breaker and tripping circuits can be conveniently tested by the device
7SA522.
The procedure is described in detail in the SIPROTEC
®
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 FNo. 351 to 353, 379 and 380 (ac-
cording to the possibilities of the auxiliary contacts); additionally, the corresponding
FNo. 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 analysed. See also
Section 2.20.1.6. Furthermore, the ready state of the circuit breaker for the CB test
must be indicated to the binary input with FNo. 371.
3.3.18 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 (Order
no. E50417-H1176-C151) The switching authority must be set in correspondence with

Siemens siprotec 7SA522 Specifications

General

Brand	Siemens
Model	siprotec 7SA522
Category	Protection Device
Language	English