Power System

Transient Recovery Voltage (TRV) is the voltage appearing across the contacts of circuit breaker after a switching action. Typically, every transient TRV has high amplitude and high frequency. In this post we will be disusing the Effects of Transient Recovery Voltage . For detail on Transient Recovery voltage, read Transient ...
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Power Line Carrier Communication (PLCC) is used for the purpose of protection of line and communication between the two stations. Two different PLCC channels are used for the protection of a single line. This is the reason, you will notice that wave traps are normally installed in R and B ...
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Alternating Current (AC) and Direct Current (DC) have slightly different effects on the human body, but both are dangerous above a certain voltage. The effect on a particular person is very difficult to predict as it depends upon a large number of factors like amount of current, duration of flow, ...
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Transposition of Conductors refers to the exchanging of position of conductors of a three phase system along the transmission distance in such a manner that each conductor occupies the original position of every other conductor over an equal distance as shown in figure below.Advantages of Transposing Transmission Line:When conductors are ...
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Harmonic voltages and currents in a Power System are a result of non-linear electric loads.In a normal AC Power System, the current varies sinusoidally at a specific frequency, usually 50 or 60 Hertz. When a linear electrical load is connected to the system, it draws a sinusoidal current at the ...
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All of us know that Power Generating Station is one where electrical power is generated. There are various types of Power Generating Station like Thermal Power Plant, Nuclear Power Plant, Solar Power Plant, Hydro Power Plant etc. All these power generating stations or plant use energy from different source to ...
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Anti Pumping Relay is used in a Circuit Breaker to indicate the spring failure of TNC i.e. Trip Neutral and Close (TNC) switch. TNC switch is used to manually Open and Close the Circuit Breaker either from Local or Remote. This is called TNC switch as it has three positions ...
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Autoreclosing is a feature which is provided in the Line Circuit Breaker so that Single Pole of a Breaker may trip and close when command is given to do so.Based on the time duration of fault existing in the Power System, faults can be classified into three categories asTransient FaultSemi-Transient ...
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Basically 33 kV / 11 kV is used for distribution of power at the substation and 66 kV / 11 kV is also used for the distribution. But whether to use 66/11 kV or 33/11 kV depends on many factors. Following are some of the factors which are taken care ...
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The length of the Transmission Line at its voltage level decides its classification as Short / Medium /Long Transmission Lines. A typical transmission line circuit looks like as shown below.We can see that there are infinite numbers of cascaded units in a Transmission Line. If we want to analysis, it ...
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The application for capacitor voltage transformers, CVTs, is the same as for Inductive Voltage Transformers. The main function of a Capacitive Voltage Transformer is as follows:To transform currents or voltages from a usually high value to a value easy to handle for relays and instruments.To insulate the metering circuit from ...
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Heat is the prime cause which leads to electrical insulation deterioration. Some possible causes of heat generation in the electrical insulation are as follows: Heat is generated in the electrically stressed insulation, due to dielectric loss and conduction currents. Heat is imparted to insulation by the neighboring current carrying parts ...
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What is Circuit Breaker?Circuit Breaker is switch capable of making or breaking the circuit under no-load as well as on-load condition. It can make or break circuit either manually or by remote control. A Circuit Breaker in conjunction with Relay can break the circuit under fault condition.You may also like ...
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Power from Generating Station to the Load Center is transmitted by 3 phase 3 wire system. The comparison between 3 phase Power Transmission and 1 phase Power Transmission is done assuming the Power to be transmitted, Voltage, Distance and loss to be same.From the economy point of view the weight ...
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Electric Power can either be transmitted by means of AC or DC. Each system has their advantages and disadvantages. Therefore it is very crucial to have a comparative study of their merit and demerits and then decide which method should be adopted to transmit power.Advantages of DC Transmission:1) The high ...
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