Arcteq AQ F3 0 Series, Инструкция по эксплуатации

Страница: 102 / 162

Instruction manual – AQ F3x0 Feeder protection IED 102 (162
)
Binary output signals Signal title Explanation
VTS_Fail_GrI VT Failure Failure status signal of the VTS function
Table 3-52: The binary output signal of the voltage transformer supervision function
Table 3-53Setting parameters of the voltage transformer supervision function
Parameter Setting value, range
and step
Description
Operation Off
Neg. Sequence
Zero sequence
Special
Operating mode selection for the function. Operation can be either
disabled “ Off ” or enabled with criterions “ Neg.Sequence ” , “ Zero
sequence ” or “ Special ” . Default setting is enabled with negative
sequence criterion.
Start URes 5 … 50 % by step of 1
%
Residual voltage setting limit. Default setting is 30 %.
Start IRes 10 … 50 % by step of
1 %
Residual current setting limit. Default setting is 10 %.
Start UNeg 5 … 50 % by step of 1
%
Negative sequence voltage setting limit. Default setting is 10 %.
Start INeg 10 … 50 % by step of
1 %
Negative sequence current setting limit. Default setting is 10 %.
3.3.5 C
URRENT TRANSFORMER SUPERVISION
(CTS)
The current transformer supervision function can be applied to detect unexpected
asymmetry in current measurement.
The function block selects maximum and minimum phase currents (fundamental Fourier
components). If the difference between them is above the setting limit, the function
generates a start signal. For function to be operational the highest measured phase current
shall be above 10 % of the rated current and below 150% of the rated current.
The function can be disabled by parameter setting, and by an input signal programmed by
the user.
The failure signal is generated after the defined time delay.
The function block of the current transformer supervision function is shown in figure bellow.
This block shows all binary input and output status signals that are applicable in the AQtivate
300 software.