Functions
2.9 Jump of Voltage Vector
SIPROTEC, 7RW80, Manual
C53000-G1140-C233-1, Release date 10.2010
109
Figure 2-33 Logic diagram of the vector jump detection
2.9.2 Setting Notes
General
The vector jump protection is only effective and available if address 146 VECTOR JUMP is set to Enabled
during configuration.
Under address 4601VECTOR JUMP the function can be turned ON or OFF.
Pickup Values
The value to be set for the vector jump (address 4602 DELTA PHI) depends on the feed and load conditions.
Abrupt active power changes cause a jump of the voltage vector. The value to be set must be established in
accordance with the particular power system. This can be done on the basis of the simplified equivalent circuit
of the diagram „Voltage Vector Following Load Shedding“ in the Functional Description section, or using
network calculation software.
If a setting is too sensitive, the protection function is likely to perform a network decoupling every time loads
are connected or disconnected. Therefore the default setting is 10°.
The admissible voltage operating range can be set at addresses 4605 for V MIN and 4606 for V MAX. The
setting values for V MIN and V MAX always refer to phase-phase voltages. With a single-phase connection
they refer to the phase-ground voltage of the selected connection. Setting range limits are to some extent a
matter of the utility's policy. The value for V MIN should be below the admissible level of short voltage dips for
which network decoupling is desired. The default setting is 80 % of the nominal voltage. For V MAX the
maximum admissible voltage must be selected. This will be in most cases 130 % of the nominal voltage.
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