Skip to main content

What is Nortons Theorem

What is Nortons Theorem

Hello, friend Today we are discussing What is Nortons Theorem. Nortons Theorem is a Is A interesting Topic So let's start, 

Any straight electrical system with voltage and current sources and no one but protections can be supplanted at terminals A– B by a proportional current source Ino in parallel association with a proportionate obstruction Reno.

This equal current Ino is the current acquired at terminals A-B of the system with terminals A-B shortcircuited. This identical opposition Reno is the obstruction got at terminals A-B of the system with all its voltage sources short-circuited and all its present sources open-circuited. 

For substituting current (AC) frameworks the hypothesis can be connected to responsive impedances and in addition protections. The Norton proportional circuit is utilized to speak to any system of straight sources and impedances at a given recurrence. 

Norton's hypothesis and its double, Th̩venin's hypothesis, are generally utilized for circuit examination improvement and to contemplate the circuit's underlying condition and enduring state reaction. Norton's hypothesis was freely determined in 1926 by Siemens and Halske scientist Hans Ferdinand Mayer (1895Р1980) and Bell Labs build Edward Lawry Norton (1898Р1983).

To locate the proportional, Discover the Norton current Ino. Ascertain the yield current, IAB, with a short out as the heap (which means 0 obstructions amongst An and B). This is Ino. 

Discover the Norton opposition Reno. At the point when there are no reliant sources (all present and voltage sources are autonomous), there are two strategies for deciding the Norton impedance Reno. 

Ascertain the yield voltage, VAB, when an open circuit condition (i.e., no heap resistor – meaning vast load obstruction). Reno squares with this VAB separated by Ino. or then again 

Supplant free voltage sources with short circuits and autonomous current sources with open circuits. The aggregate obstruction over the yield port is the Norton impedance Reno. 

This is comparable to figuring out the Thevenin opposition. Be that as it may, when there are reliant sources, the more broad technique must be utilized. This technique doesn't appear beneath the graphs. 

Associate a consistent current source at the yield terminals of the circuit with an estimation of 1 ampere and ascertain the voltage at its terminals. This voltage separated by the 1 A current is the Norton impedance Reno. This technique must be utilized if the circuit contains subordinate sources, yet it can be utilized as a part of all cases notwithstanding when there are no needy sources.


Read More


Popular posts from this blog

Limitations of Terzaghi Theory

Limitations of Terzaghi Theory The value of the coefficient of consolidation has been assumed to be constant.  The distance d of the drainage path cannot be measured accurately in the field. The thickness of the deposit is generally variable, and an average value has to be estimated.  There is sometimes difficulty 1n locating the drainage face, sometimes thin previous seams that can act as good drainage face are missed in the boring operations. The equation is based on the assumption that the consolidation is one-dimensional. In the field, the consolidation is generally 3-dimensional. The lateral drainage may have a significant effect on the time rate of consolidation. The initial consolidation and secondary consolidation have been neglected. Sometimes these form an important part of the total consolidation. In actual practice, the pressure distribution may be far from linear or uniform. Read More Muller-Breslau principle

Price Guard Wire Method

Price Guard Wire Method Some form of  Price Guard Wire Method  is generally used to eliminate the errors caused by leakage currents over insulation. Fig. 3.14 illustrates the operation of This Method. In fig 3.14(a), a high resistance mounted on a piece of insulating material is measured by the ammeter voltmeter method. The micro-ammeter measures the sum of the current through the resistor (IR) and the current through the leakage path around the resistor. The measured value of resistance computed from the readings indicated on the voltmeter and the microammeter, will not be a true value but will be in error.   Figure 3.14 Application of  guard  circuit for measurement of high resistance In fig, 3.14 (b), the  guard  terminal has been added to the resistance terminal block. The  guard  terminal surrounds the resistance terminal entirely and is connected to the battery side of the micro-ammeter. The leakage current IL now

Negative Booster

Negative booster A negative booster is employed to conform to the regulation that the potential difference between any two points of the rail return shall not exceed 7 V. Two boosters, positive and negative, are used which are mechanically coupled together and driven by a DC motor. The positive booster is connected to the trolley wire (near the generating station) and the negative booster (separately excited) is connected to the track rail.  The 'positive booster' adds voltage to the line while the 'negative booster lowers the potential of the point it is connected to. As we go along the trolley wire away from the generating station/sub-station, the potential drop increases, and the voltage of the trolley wire falls. Since the current returns via the track rail points away from the generating station acquire high potentials. This potential is brought down by the negative boost provided by the negative booster. When the load is sufficiently far aw