Answer / sidharth

An autotransformer doesn't provide electrical isolation between its windings like an ordinary transfomer. hence, the maximum limit for voltage transformation in an autotransformer is 3:1. beyond this value, it is safer to use a 2 winding transformer.

Answer / iftikhar

It is unsafe for stepping down a high voltage to low voltage
in an auto transformer, if an open circuit develops in the
common portion of winding then full primary voltage will
appear across the load which could be dangerous to both the
persons and the equipment.

Answer / dipak

An auto transformer can could fail in such a way as to have
a primary voltage secondary and such condition cause a
damage or injury.

Answer / gourav bapna

autotransformer is a single winding transformer with unity
ratio.that implies a 1:1 ratio which cannot step up voltage
from a low voltage source.

Answer / bhigesh

al type transformers are step up tramsformer.its aim to
decrease voltage at the keys of independent voltage inverter

Corona occurs between two transmission wires when they (a) are closely-spaced (b) are widely-spaced (c) have high potential difference (d) carry d.c. power

2 Answers   Power Grid,

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why generating voltages are of 11kv 33kv 22kv of 11 multiples

5 Answers  

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Difference between DOL starter & star Delta Starter? And where the Dol starter used upto how much HP and whereas Star Delta vice versa?

3 Answers  

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How can a transformer test by megger?

1 Answers   Bosch,

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The exciting current of a transformer is non sinusoidal. why?

2 Answers  

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how we decide wire gauge for ac or dc coil and what is the basic diff. B/w these two coil?

1 Answers  

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What descriptive information does the NEC require to be marked on all conductors?

1 Answers  

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What is cut-off rate?

1 Answers  

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What are the different types of hydro schemes?

1 Answers  

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in 5 mva transformer 33/11 kv s/s what rating of capacitor bank is required & what is the fourmula for rating

6 Answers  

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how we can come to know that motor winding resistance which showing by DMM is right or wrong???is there any chart or something that we will compare & check???

1 Answers  

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what happens when a DC supply is given to AC motor?

9 Answers   Areva, ISMT,

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