A 3-phase system has a phase to phase fault (i.e. phase B is short circuit to phase C while phase A is healthy). The equivalent impedances are Z+-j0.25pu, Z.-j0.15pu, Zo-j0.1pu. Calculate the per-unit positive sequence current /+ A B с O-j2.2pu O-j2.4pu O-j2.6pu O-j2.5pu

Q: 8.41 Write the nodal equations using the general approach for the following network (part "a)" only)…

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Q: Why the tranformer rattigs are mentioned in KVA. Discuss in brief.

A: The transformer is a device which is use to transfer the power from one portion to the other…

Q: 12. Find the resistance of a piece of 12 AWG aluminum wire that is 550 ft long. Assume a temperature…

A: Given data: 12 AWG aluminum wire Length l=550 ft Temperature 20° C

Q: How did 2 + j8ohms become 2 + 2 + j8ohms and then 8.9 ∠63.4? Like what did you do and why?

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Q: 9.3 A person is working on a steel structure while standing on the ground. An accident occurred…

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Q: Q. 16. The best gas mixture for circuit breakers of the following is: C. Air and Sf6 DON₂ and…

A: Answer is option B  SF6 and N2 is the best gas mixture for circuit breakers. SF6 is a highly…

Q: HALD (0 cylindrical resistors, R₁ and R₂, are made of the same material. Resistor R₂ has twice the…

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Q: Divide the following: a. x4 / x3 b. s3 / s5 c. z12 / z10

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Q: Q8. Can skewed slots reduce all space harmonics? Give your explanation.

A: Yes, the skewed slots reduce all the space harmonics in an induction motor.

Q: 3c. Fill out the table with values for the charge on C and time rate of change of the current…

A: Resistors, inductors and capacitors form an integral part of any electrical circuit. A source,…

KVL and KCL

KVL stands for Kirchhoff voltage law. KVL states that the total voltage drops around the loop in any closed electric circuit is equal to the sum of total voltage drop in the same closed loop.

Sign Convention

Science and technology incorporate some ideas and techniques of their own to understand a system skilfully and easily. These techniques are called conventions. For example: Sign conventions of mirrors are used to understand the phenomenon of reflection and refraction in an easier way.