3.3 Commissioning
417
7SA522 Manual
C53000-G1176-C155-3
Figure 3-24 Measuring voltages for the synchronism check
• If not, first check whether one of the before named messages 2947 ´6\QF
8GLII!µ or 2949 ´6\QFϕGLII!µ is available in the spontaneous messages.
The message ´6\QF8GLII!µ indicates that the magnitude (ratio) adaptation is
incorrect. Check address 8OLQH8V\QF and recalculate the adaptation
factor, if necessary.
The message ´6\QFϕGLII!µ indicates that the phase relation of the busbar
voltage does not match the setting under address 8V\QFFRQQHFW (see
Section 2.1.3.1). When measuring across a transformer, address ϕ8V\QF
8OLQH must also be checked; this must adapt the vector group (see Subsection
2.1.3.1). If these are correct, there is probably a reverse polarity of the voltage
transformer terminals for Usync.
• The program 8V\QF8OLQH! = <(6 (Address ) and 6<1&&+(&. = <(6
(Address ) is set for synchronism check.
• Open the VT mcb of the busbar voltage.
• Via binary input (FNo.2906 ´!6\QF6WDUW$5µ ) initiate the measuring request.
There is no close release. If there is, the VT mcb for the busbar voltage is not allo-
cated. Check whether this is the required state, alternatively check the binary input
´!)$,/%XV97µ (FNo. 362).
• The VT mcb of the busbar voltage is to be closed again.
• Open the circuit breaker.
• The program 8V\QF!8OLQH = <(6 (Address ) and 8V\QF!8OLQH =
12 (Address ) is set for synchronism check.
• Via binary input (FNo. 2906´!6\QF6WDUW$5µ) initiate the measuring request.
The synchronism check must release closing (message ´6\QFUHOHDVHµ, FNo.
2951). Otherwise check all voltage connections and the corresponding parameters
again carefully as described in Section 2.1.3.1.
• Open the VT mcb of the feeder voltage.
• Via binary input (FNo.2906 ´!6\QF6WDUW$5µ ) initiate the measuring request.
No close release is given.
• Open the VT mcb of the feeder voltage again.
Addresses to must be restored as they were changed for the test. If the
allocation of the LEDs or signal relays was changed for the test, this must also be re-
stored.
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