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Oil drying unit/ online Moisture absorption of Transformers
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How to use oil drying unit
What is the process of testing oil drying unit.
And how to calibration of oil drying unit
There are Below all process...
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Basic Power Factor Theory: Power Factor compares the active power (kilowatts or kW) with apparent power (KVA) that is demanded from the power source. It is also a comparison of the active current to the total current, as shown in the triangle below. It is also equal to the cosine of the angle of displacement between the voltage and current waveform. The ratio of actual power to apparent power is usually expressed in percentage and is called power factor. Generally the Transformers are inductive loads and cause very low power factor during their testing. Inductive equipment needs magnetizing power to produce the flux necessary for the operation of inductive devices. The unit of measure of magnetizing or reactive power is the kilovar (kVAR). The active power (kW) and reactive power (kVAR) together make up apparent power which is measured in kilovolt-amperes (kVA). By representing these components (kW and kVAR) of apparent power (kVA) as the sides of a right triangle, we can ...
NTPC NGEL ! Online Crash Course ! Government Job Preparation ! NTPC Green Energy Limited (NGEL), a subsidiary of NTPC Ltd. has presence in the renewable power and hydrogen generation business. Commensurate with our country's growth challenges, the company has embarked upon an ambitious plan to attain a total installed capacity of 60 GW by 2032 Eligibility: RE (Electrical) Full Time 1 st class B.Tech/B.E. in the area of Electrical Engineering. NGEL Exam Pattern 2023 Candidates should be aware of NGEL Exam Pattern in order to have an understanding of the sectional weightage, exam duration etc. Details of the same are as follows: A total number of 120 questions are asked. The exam will be conducted for 120 marks. The duration of the examination is 2 hours. Subject No. of Qs. Max. Marks Professional Knowledge 60 60 General Awareness 15 15 English Language 15 15 Logical Reasoning 15 15 Quantitative ...
Transformer losses 1. Core loss or Iron loss a. Hysteresis loss in transformer : Hysteresis loss is due to reversal of magnetization in the transformer core. This loss depends upon the volume and grade of the iron, frequency of magnetic reversals and value of flux density. Steinmetz formula: W h = ηB max 1.6 fV (watts) where, η = Steinmetz hysteresis constant V = volume of the core in m 3 F = Frequency Energy loss in a transformer (Eddy current in the core ) b. Ed dy current loss in transformer : In transformer, AC current is supplied to the primary winding which sets up alternating magnetizing flux. When this flux links with secondary winding, it produces induced emf in it. But some part of this flux also gets...
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