Setting Notes - Siemens SIPROTEC 4 7VE61 Manual

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Figure 2-46
2.8.2

Setting Notes

General
The vector jump protection is only effective and available if address 146 VECTOR JUMP is set to Enabled
during configuration.
Address 4601 VECTOR JUMP serves to switch the function ON or OFF or to block only the trip command
(Block relay).
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 after a 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 für U MIN and 4606 für U MAX. Setting
range limits are to some extent a matter of the utility's policy. The value for U 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 U MAX the maximum admissible voltage must be selected. This will be in most cases
130 % of the nominal voltage
Time Delays
The time delay T DELTA PHI (address 4603) should be left at zero, unless you wish to transmit the trip indi-
cation with a delay to a logic (CFC), or to leave enough time for an external blocking to take effect.
SIPROTEC 4, 7VE61 and 7VE63, Manual
C53000-G1176-C163-3, Edition 10.2017
Logic Diagram of the Vector Jump Detection
Functions
2.8 Jump of Voltage Vector
99