Answer / nilamani

if we will operate the CT in open circuit then due to heavy
magnetising current due to primary winding will effect the
saturation ll be affected.

Answer / tameshwar singh

The CT saturation occurs when secondary winding is kept
open. At this time there is no demegnatising current flows
in secondary winding and due to this primary winding will
carry very high megnatising current.As the high megnatising
current produces high megnatic flux which causes the CT
core saturation

Answer / santhosheee

Normally Protection CT will designed by some saturation
level ie Knee Point Voltage. its depepending upon the
protection level. for example if any fault the voltage will
build up in the CT because its transfomer.according to
fault level the manufacturer designing the CT with some
saturation level. If any heavy fault Like lightning,( some
time substation system will affect heavy lightning ) may
be that time and above knee point voltage the CT will be
saturate. its like a short circuit in the CT winding. so
flash over may occur in the CT.

Whether amorphous core transformer is commercialized or not:Name of company making amorphous core transformer and what are different rating?

0 Answers   DAE,

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Why we Do not connect the windings of the motor in delta? & what would happen if we do that? I mean the winding themselves not the three lines that are coming to the motor?

1 Answers  

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what is the value will come when megger the phase to phase ,phase to neutral ,phasae to ground ?

3 Answers  

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what is circulating current in parallel transformer???plus how it is generated ???plz explain in detail.........

2 Answers  

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meter ratio is 100/5 CT ratio is 125/5, when the ratios changes i.e., CT ratio is 125/5 meter ratio is 100/5 what is the MF in boths conditions?

1 Answers  

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Why cpaciter opposes sudden changes in voltage?and how?

1 Answers  

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How to calculate voltage drop in copper and aluminium cable? I have laid 240Sq.mm Aluminium cable for the length of 600 Mtrs in 1 Mtrs underground. Normal load is 150A. Transformer is 630KVA, 6.KV/433V. But, I am getting only 395 Volts when load. How to calculate voltage drop and what is the permissible voltge drop for this circuit?

1 Answers  

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if There is Short circuit in Power Transformer, what will happened to Buchholz Relay.?? How Buchholz Relay will respond.??

2 Answers  

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What is meant by sag?

0 Answers  

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what is impedence voltage

1 Answers   Thermax,

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Purpose of lighting transformer.

2 Answers  

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how to test a motor from megger

5 Answers   JSW,

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