The sequence networks are indicated schematicaly by rectangles. Connection diagram for line to line faults. Published on 19 oct 15. The voltage at rated frequency is applied to the hv side with the help of a variac of variable ratio autotransformer. I a i b and i c are the current and v a v b and v c are the voltage across the three phase line a b and c respectively. Unlike a pictorial diagram a wiring diagram uses abstract or simplified shapes and lines to show components. The connection of the sequence networks to simulate unsymmetrical double phase to ground fault is shown below. The line to line voltage is the vector sum of the line to neutral voltages. Which among these is the connection diagram for line to line faults. Symbols that represent the components in the circuit and lines that represent the connections between them.
Home category electrical engineering mcq questions and answers power system analysis stability computer techniques.
Earthing transformer single line diagram. Earthing transformer connection diagram. Pictorial diagrams are often photos with labels or highly. The fault impedance of the line is z f. Circuit diagram of single line to ground fault suppose the phase a is connected to ground at the fault point f as shown in a figure below. The connection scheme shown above in figure 1 can be used to indirectly measure the line to line voltages on a y connected systems.
A voltmeter wattmeter and ammeter are connected to the hv side of the transformer as shown. The voltage at rated frequency is applied to the hv side with the help of a variac of variable ratio autotransformer. How is a wiring diagram different from a pictorial diagram. The connection diagram for a short circuit test on a transformer is shown in figure 11 11. The sequence networks are indicated schematicaly by rectangles. Wiring diagrams are made up of two things. The line to line voltage is the vector sum of the line to neutral voltages. This impedance is very high relative to the series. Now with the help of the variac. Since the delta connected transformer represents an open circuit in the zero sequence diagram the only path for the fault current to flow through is the system capacitance.
The sequence networks are indicated schematicaly by rectangles. Since the delta connected transformer represents an open circuit in the zero sequence diagram the only path for the fault current to flow through is the system capacitance. Solving double line to ground fault using the mva method sequence networks of a power system can be so interconnected that solving the resulting network yields the symmetrical components of current at the fault. Therefore from wiring diagrams you know the relative location of the components and how they are connected. Symbols that represent the components in the circuit and lines that represent the connections between them. Published on 19 oct 15. Line to ground fault the sequence diagrams would be connected in series as shown. Wiring diagrams show how the wires are connected and where they should located in the actual device as well as the physical connections between all the components. The following phasor diagram diagram 1 will help. Earthing transformer single line diagram.
Earthing transformer connection diagram. It s a language engineers need to learn when they work on electronics projects. None of these. Published on 19 oct 15. Therefore from wiring diagrams you know the relative location of the components and how they are connected. Home category electrical engineering mcq questions and answers power system analysis stability computer techniques. Usually the lv side of the transformer is short circuited. Symbols that represent the components in the circuit and lines that represent the connections between them. The voltage at rated frequency is applied to the hv side with the help of a variac of variable ratio autotransformer. Wiring diagrams are made up of two things.
The connection of the sequence networks to simulate unsymmetrical double phase to ground fault is shown below. A voltmeter wattmeter and ammeter are connected to the hv side of the transformer as shown. How is a wiring diagram different from a pictorial diagram. Home category electrical engineering mcq questions and answers power system analysis stability computer techniques. Unlike a pictorial diagram a wiring diagram uses abstract or simplified shapes and lines to show components. Line to ground fault the sequence diagrams would be connected in series as shown. Solving double line to ground fault using the mva method sequence networks of a power system can be so interconnected that solving the resulting network yields the symmetrical components of current at the fault. The best way to ground an ungrounded delta system existing or new is to derive a neutral point through grounding transformers as shown in figure above. The voltage at rated frequency is applied to the hv side with the help of a variac of variable ratio autotransformer. The resistor inserted in the broken delta leg is reflected to the primary underground fault conditions and limits the current to a.
Wiring diagrams are made up of two things. The line to line voltage is the vector sum of the line to neutral voltages. I a i b and i c are the current and v a v b and v c are the voltage across the three phase line a b and c respectively. Home category electrical engineering mcq questions and answers power system analysis stability computer techniques. Therefore from wiring diagrams you know the relative location of the components and how they are connected. Earthing transformer single line diagram. It s a language engineers need to learn when they work on electronics projects. The fault impedance of the line is z f. Unlike a pictorial diagram a wiring diagram uses abstract or simplified shapes and lines to show components. The sequence networks are indicated schematicaly by rectangles.
