Arcteq AQ F3 0 Series, Инструкция по эксплуатации

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Instruction manual – AQ F3x0 Feeder protection IED 104 (162
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To prevent such problems, this function checks if the systems to be interconnected are
operating synchronously. If yes, then the close command is transmitted to the circuit
breaker. In case of asynchronous operation, the close command is delayed to wait for the
appropriate vector position of the voltage vectors on both sides of the circuit breaker. If the
conditions for safe closing cannot be fulfilled within an expected time, then closing is
declined.
NOTE: For capacitive reference voltage measurement, the voltage measurement card can
be ordered with <50 mVA burden special input.
The conditions for safe closing are as follows:
•
The difference of the voltage magnitudes is below the set limit
•
The difference of the frequencies is below the set limit
• The angle difference between the voltages on both sides of the circuit breaker is within
the set limit.
The function processes both automatic reclosing and manual close commands.
The limits for automatic reclosing and manual close commands can be set independently
of each other.
The function compares the voltage of the line and the voltage of one of the busbar sections
(Bus1 or Bus2). The bus selection is made automatically based on a binary input signal
defined by the user.
For the reference of the synchrocheck any phase-to-ground or phase-to-phase voltage can
be selected.
The function processes the signals of the voltage transformer supervision function and
enables the close command only in case of plausible voltages.