Answer / cnu

Please be specific in asking your question.

max load in the sense, the max load is defined to a
particular cable that is operating at a particular voltage.

and max voltage from earth to phase means...... how can you
decide that.

a 3-ph 415V supply has a earth to phase volate of 230V,
which is the one we have in our house.

Same way a 11KV line has an earth to phase violtage of
6.3kV. and so on we go upto 800KV.

Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,

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Whar is the KvA rating of 33Kv substation & actual kv rating of power generaating station.

0 Answers  

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1. What is differential relay? How it operates? 2.How to calculate the Short Circuit Impedance in Transformer? 3.What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works? 4. While testing the 33KV Busbar by using Hipot kit, what should be the test voltage we have to apply? 5. What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer? 6. Explain how you can give the overload setting to any Motor Protection Relay for a HT motors with formula and example? 7. Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient? 8. What should be the minimum and maximum ohmic value for earthing? 9. Why DC Currents are not used in transformer? 10. What is the Frequency while we step up the voltage from 220V to 11KV? Is it possible? Explain it?

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why rms value of voltage is fed to transformer

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Which Machine u will prefer to use at a place where flammable gases are coming out & why ?

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What will happen when we connect 2 bulbs in series between 2 phases

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3 Answers  

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Either the Armoured Earthing strip of HT 3 core cable have to pass through CB CT or not , why ???

0 Answers  

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how many types of ct retio

3 Answers  

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why capacitor offer reactance to alternating current?

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What is difference between ball screw and lead screw.

2 Answers  

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1.Whats the use of GNAC(Generator Neutral Accessory Compartment) 2. why generator or any other system require Neutral Grounding and not Phase grounding 3. what happens if any one of the phase is grounded. 4. if 15kv is grounded directly what will happen, why it should not be grounded like that 5. use of of NGTR(Neutral Grounding Transformer and Resistor) for grounding is helpfull and how

5 Answers   BEMCO, CSS, Powergear,

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