Answer / kanchan chakraborty

Sequence networks are to network representation of a system in terms of its sequence components.
Any 3 Phase system can be studied for its performance in terms of its 3 sequence components. The three sequence components are Zero Sequence component, Positive sequence component and negative sequence component.

In constant power region of 3-phase IM torque-speed characteristics, if frequency increases slip A does not alter B decreases C increases D none of above

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What is the min.& max distance between two earth spikes is required for measuring earth resistance of an earth pit? Is the manufacturer of Earth tester decides this? Pls explain.

3 Answers   ABB, HAL,

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Technical equations

1 Answers   ME,

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What is the difference between automatic & semi-automatic star-delta starters?

3 Answers  

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(1)The demand for electricity , the amount of renewable generation available, the amount of fossil fuel generation available and the cost of the fossil fuel generation are shown in table below period(hrs) demand(MW) renewable (MW) fossil- fuel(MW) cost of fossil fuel(MW) 00.00 - 01.00 2000 1800 2000 30 01.00 - 02.00 2300 2500 2000 30 02.00 - 03.00 2500 2700 2100 45 03.00 - 04.00 2900 3100 2100 50 04.00 - 05.00 2700 2600 2500 45 05.00 - 06.00 2400 2000 2700 50 06.00 - 07.00 2200 1800 2000 36 07.00 - 08.00 2100 1600 2000 36 Assuming that the renewable generation incurs zero cost, determine an optimal generation schedule(specifying the amount of renewable generation and fossil fuel generation used in each period, the cost for each period and the overall cost for 8 hours.)

0 Answers  

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what is hysteresis loss?

4 Answers   PSU,

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what is preventive maintenance? and what is predictive maintenance? and what diffrence both?

3 Answers   Volkswagen,

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explain me the relation between torque, frequency,speed,voltage and current in the 3 phase induction motor?

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Dear sir,We have a 7.5hp motor,it was running smoothly and suddenly one winding is carring more current then others(r=6.5,y=6.3,b=10)..whts wrong with tis...?

5 Answers   Hindustan Motors,

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Hi.. I am a BE GRaduate in E&E. I have 8.5 Experience in Tendering & Estimation field. I have done SAP SD course few years back. But due to some reason i failed to get job in that field and continued my own field. Now I am thinking of changing into SAP seriously. How should i go ahead???

0 Answers  

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How can I calculate the trnaformer effciency at different loading condition?

2 Answers  

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how can alculate the apfc panel rating?

3 Answers  

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