Examples of 'zero sequence' in a sentence
Meaning of "zero sequence"
zero sequence: In electrical engineering, the term 'zero sequence' refers to the component of a three-phase electrical system where all three phases have equal magnitudes and are 120 degrees apart. It is commonly used in analyzing unbalanced conditions and fault currents in power systems
How to use "zero sequence" in a sentence
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zero sequence
The present invention is a zero sequence directional element.
The zero sequence impedance of an ungrounded system will typically have a high magnitude.
Calculation of the zero sequence component.
The zero sequence current IO through the combination of ZOL and XCOL is also measured.
A further alternative is to measure the total zero sequence current ISM.
The balanced zero sequence network is characterized by a low current impedance.
Solid-state trip device comprising a zero sequence current detection circuit.
Calculation of zero sequence currents induced by parallel line load currents in the main grid.
The second step 2a, b is to decide whether to do zero sequence current reduction or not.
This is because zero sequence quantities are available when there are ground faults.
Therefore, overheating is eliminated and the total potential of zero sequence generator is obtained.
ZLO is the zero sequence line impedance.
Figure 4 shows the implementation of the above-described zero sequence directional element.
The exact placement of a zero sequence CT to properly detect ground fault current is.
Under normal balanced conditions, the transformer network is referred to as a zero sequence network.
See also
The element also measures the zero sequence current IO through XCOS.
In a zero sequence network, resultant voltages and currents remain near the original input values.
In case of a ground fault, the zero sequence current rises several levels in magnitude.
Thus, it is proposed firstly to utilize this freedom for avoiding zero sequence quantities.
Figure 5 shows a zero sequence current-polarized directional element which could be used in such an arrangement.
These vector sets are described as the positive, negative and zero sequence sets respectively.
Figure 1A shows a zero sequence representation for a forward ground fault in an ungrounded system.
Figure 5 is a circuit diagram showing the operation of a zero sequence current-polarized directional element.
The zero sequence current is derived from the 3 phase currents vectors by scalar summation, EPMATHMARKEREP.
In the directional element of the present invention, only the zero sequence quantities are used.
Figure 1B shows the zero sequence network which occurs for a reverse ground fault.
The next supervisory condition also concerns the enabling of the zero sequence impedance calculator 30.
If zero sequence current reduction should be done then zero sequence currents will be deducted 12a, b.
Positive, negative and zero sequence.
The values of the zero sequence currents are inserted in 11a, b.
Hi everyone qq'un has already tried to manufacture a zero sequence generator?
Figure 1 is the positive, negative and zero sequence impedance network for phase-to-ground faults.
Z I 0 - impedance of a whole line for the zero sequence.
Perform the experiment of distance, zero sequence and reclose test . With GPS trigger function, to.
C I 0 - shunt capacitance of a whole line for the positive zero sequence.
FIG . 2 shows a differential transformer with a zero sequence toroid for measuring leakage current ;.
However, this quantity will involve the impedance of a line for the zero sequence ( Z L 0 ).
Analogously we can determine the zero sequence component of the total fault current ( I F 0 ).
If A is quasi-nilpotent then λ ( A ) is the zero sequence.
Means ( 40 ) for calculating a value ( ZO ) representative of a zero sequence impedance for the power system ;.
Figures 2b, 2c show corresponding diagrams for the negative sequence and zero sequence components, respectively ;.
Symmetrical Components ( positive, negative and zero sequence components ).
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