Answer Posted / shyam majgaonkar

Potential Transformer is Inductive step down transformer
used for measurement of voltage and protection where as cvt
is capacitive voltage transformer consisting of stack of
series connected capacitor the voltage across the capacitor
is used to measure the voltage.
It also serves the purpose of power line carrier
communication

What kind of preventive maintenance are there for transformer?

2324

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What is a feedback in control system?

1261

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What is core CT & it's function?

2247

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How many capacitors using in LT panel as per Govt rules?

2018

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What is the formula for calculating impedance of transformers connected parallel at fault level 50KA?

2152

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how can we say that stator magnetic field rotates with synchronous speed?can we derive?

1820

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Give two basic speed control scheme of dc shunt motor?

1153

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How to arrange a hous hold earthing system to keep minimum earth resistance( below 7ohms).

2217

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Why increase in current leads to increase in conductor temperature?

1180

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As a electrical engineer.. what are the basic norms should follow in transformer oil testing.. 1.What is the Electrode type? 2.How long time you will give for oil testing?

3714

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hi can any body send me syllabus of rrb electrical section engg... and past pepar also of any board...

2730

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temp of cast resin 1500kva tx formerwent up to 138.c but came down very fast to about 100.c within 20 mins when load was reduced from 70% to 60%

1964

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I WANT BHEL PREVIOUS QUESTION

2425

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Please clarify 1. Icw: rated short circuit working withstand capacity 2. Icu: Rated ultimate breaking capacity 3. Ics: Rated service short circut withstand capacity 4. other specification of ACB

2799

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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

2109

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