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Functions
2.4 Synchronism and voltage check (optional)
Figure 2-19
Connection, single-phase
If only a single-phase voltage is available as reference voltage U
= 1phase during configuration. If this type of connection is used, the reference voltage U
connected to the voltage input U
transformer. In this case, parameter 212 will be hidden since only two voltages are available. As the example
in the following figure shows, the reference voltage U
angle as the voltage U
be synchronized on primary side is UL3–E. The necessary phase-angle adjustment is here accomplished via
parameter 214 ϕ Usy2-Usy1. Should also the amplitudes of the two voltages differ from each other, param-
eter 215 Usy1/Usy2 ratio can be set to adjust them.
92
Example of a three-phase phase-to-earth connection
of the 7VK61, regardless of the phase actually used at the primary voltage
L1
to be synchronized. The reference voltage on primary side is UL2–E, the voltage to
sy2
, parameter106 is set to VT CONNECTION
sy1
does not necessarily have to assume the same phase
sy1
C53000-G1176-C159-3, Release date 05.2009
must always be
sy1
SIPROTEC, 7VK61, Manual
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