ABB SYN 5201 Operating Instructions Manual page 97

Operating Instructions
If the parameters  smax, df/dt, ts f and tp f are set correctly, a single adjusting command
f+ is sufficient in order to achieve the tolerance band, assuming that the governor is
functioning in a stable manner.
The matching procedures should be repeated and observed several times, starting from
different working points. If oscillations occur, the setting value df/dt should be increased
until no further oscillations occur. It is also possible to repeat the test function "TEST f-
Match".
Checking the paralleling
At the end of commissioning, "blind" synchronization should be carried out several times
(circuit breaker in Test position). The differential voltage and the paralleling command
should thereby be recorded using the transient recorder of the PC Tool SynView or
using an external transient recorder. At the same time, the synchronizing process should
be observed using the synchronizing instruments in the plant or, if these are not
installed, using the synchronizing instruments in "SynView" .
Bring circuit breaker to operating position, adjust voltage and frequency and carry out
"live" synchronization. Record the synchronizing process.
abb
ABB Switzerland Ltd
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Correct paralleling
dU = Voltage difference u1 – u2
S1 = Paralleling command
S2 = Paralleling command release
S3 = Paralleling command of the
a =
s =
t =
t-1 = Second last recording stored
t-2 = Third last recording stored in
Document No Art Part
3BHS109762 E01
SYN 5201/SYN 5202
(channel 1)
(channel 2)
system (channel 1 AND
channel 2)
Phase difference angle at the
instant of the paralleling
command (channel 1)
Slip at the instant of the
paralleling command
(channel 1)
Last recording stored in
SYNCHROTACT
in SYNCHROTACT
SYNCHROTACT
Language Revision
en D
page
97