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While choosing the insulating materials for the UG cables, it should possess which of the following characteristics?
When selecting insulating materials for underground (UG) cables, the materials should possess the following characteristics: 1. Electrical Insulation: High dielectric strength and low electrical conductivity to prevent current leakage. 2. Moisture Resistance: Ability to withstand moisture and prevenRead more
When selecting insulating materials for underground (UG) cables, the materials should possess the following characteristics:
1. Electrical Insulation: High dielectric strength and low electrical conductivity to prevent current leakage.
2. Moisture Resistance: Ability to withstand moisture and prevent water ingress which can degrade insulation.
3. Thermal Stability: Good performance over a range of temperatures, withstanding high temperatures without degrading.
4. Chemical Resistance: Resistance to chemicals, oils, and solvents that may be present in the environment.
5. Mechanical Strength: Sufficient mechanical toughness to endure physical stresses during installation and operation.
6. Low Thermal Conductivity: To minimize heat loss through the insulation.
7. Flame Retardancy: Resistance to ignition and propagation of flames to enhance safety.
8. Durability: Longevity under operational conditions to reduce maintenance costs.
9. Flexibility: To allow for bending and installation in confined spaces without damage.
These characteristics help ensure the reliability and safety of underground cable installations.
See lessThe p-region has a greater concentration of __________ as compared to the nregion in a P-N junction.
holes
holes
See lessTransmission efficiency of a transmission line increases with the _____________
Transmission efficiency of a transmission line increases with the reduction of resistance and reactance.
Transmission efficiency of a transmission line increases with the reduction of resistance and reactance.
See less27. When the p-n junction diode is reversed biased, the width of the depletion region
When the p-n junction diode is reversed biased, the width of the depletion region increases. This occurs because the applied reverse voltage causes more charge carriers to be pulled away from the junction, resulting in a wider region devoid of charge carriers, or the depletion region.
When the p-n junction diode is reversed biased, the width of the depletion region increases. This occurs because the applied reverse voltage causes more charge carriers to be pulled away from the junction, resulting in a wider region devoid of charge carriers, or the depletion region.
See lessUse of additional shunt capacitor can be made for increasing the capability of the line as it will ____
Use of additional shunt capacitor can be made for increasing the capability of the line as it will improve the voltage support and increase the reactive power compensation, leading to enhanced transmission efficiency and stability.
Use of additional shunt capacitor can be made for increasing the capability of the line as it will improve the voltage support and increase the reactive power compensation, leading to enhanced transmission efficiency and stability.
See lessThe transmission capacity of a line at 50 Hz frequency as compared to that at 60 Hz is ______
The transmission capacity of a line at 50 Hz frequency as compared to that at 60 Hz is typically lower. This is because the thermal limits and the reactive power aspects of transmission lines are influenced by the frequency. As the frequency increases, the transmission line can carry more power dueRead more
The transmission capacity of a line at 50 Hz frequency as compared to that at 60 Hz is typically lower. This is because the thermal limits and the reactive power aspects of transmission lines are influenced by the frequency. As the frequency increases, the transmission line can carry more power due to a higher loading capacity, leading to a generally higher power transmission capability at 60 Hz compared to 50 Hz.
See lessWhat will happen when the characteristic impedance of a transmission line is equal t the load impedance ______________
When the characteristic impedance of a transmission line is equal to the load impedance, there will be no reflections at the load. This condition is known as a matched load, and it ensures that the maximum amount of power is transferred from the transmission line to the load, resulting in optimal peRead more
When the characteristic impedance of a transmission line is equal to the load impedance, there will be no reflections at the load. This condition is known as a matched load, and it ensures that the maximum amount of power is transferred from the transmission line to the load, resulting in optimal performance and efficiency in the transmission system.
See lessCharacteristic impedance of a transmission line depends upon ____________
Characteristic impedance of a transmission line depends upon the physical characteristics of the line, specifically the inductance per unit length (L) and the capacitance per unit length (C). It is given by the formula ( Z_0 = sqrt{frac{L}{C}} ).
Characteristic impedance of a transmission line depends upon the physical characteristics of the line, specifically the inductance per unit length (L) and the capacitance per unit length (C). It is given by the formula ( Z_0 = sqrt{frac{L}{C}} ).
See lessFerranti effect is very prominent in occurrence in what type of transmission line?
The Ferranti effect is very prominent in long transmission lines.
The Ferranti effect is very prominent in long transmission lines.
See lessIdentify the characteristics of the Ferranti effect. (i) Flow of unduly heavy current (ii) It occurs at unloaded condition (iii) Rise in the receiving end voltage
The Ferranti effect is a phenomenon observed in long transmission lines, particularly under light loading or no load conditions. The characteristics of the Ferranti effect include:(i) Flow of unduly heavy current: This characteristic is generally not directly associated with the Ferranti effect. TheRead more
The Ferranti effect is a phenomenon observed in long transmission lines, particularly under light loading or no load conditions. The characteristics of the Ferranti effect include:
(i) Flow of unduly heavy current: This characteristic is generally not directly associated with the Ferranti effect. The effect is more relevant to voltage rise rather than heavy current flow, which can occur under different circumstances.
(ii) It occurs at unloaded condition: This is a true characteristic of the Ferranti effect. It is most pronounced when the transmission line is lightly loaded or completely unloaded.
(iii) Rise in the receiving end voltage: This is a defining feature of the Ferranti effect. Under no-load or light-load conditions, the receiving end voltage can rise above the sending end voltage due to the capacitive nature of long transmission lines.
In summary, the Ferranti effect is characterized by its occurrence under unloaded conditions and the rise in receiving end voltage, but it doesn’t typically relate to unduly heavy current flow.
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