Answer / vinayak

The gapless metal oxide technique is used to achieve
non-linear characteristic.
In this technique Zinc Oxide grains with controlled
impurities of Bismuth Oxide and Antimony Oxide are
introduced to the resistor.
The micro-structure hence formed have execellent non linear
characteristic.
This technique is used in the formation of Lightening/Surge
Arrestor which are used in the protection.

What is the actual formula for transformer short circuit test? below i given rating of the transformer.. 1000KVA, pri 11KV, Pri amp 56A. %Z 5.95..

2 Answers  

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what is synchronous speed.? if an induction motor is made to run at full load, then is this synch. speed too..?

2 Answers  

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what factor is necessary during design of HT & LT MOTORS.

2 Answers   ABB, L&T,

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In case of legging current of 20°, pf is .94 and leading of 20°,pf is .94 , in mathematicaly both are same but in realy how it is differ ?

3 Answers  

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What is the equivalent circuit of a transformer and its vector diagram?

0 Answers   Bhel, Madhucon,

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what is diffrence between primary & secondry transformer?

3 Answers  

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it is clear that volts equal to the current as per ohms law. is it appliable to the AC power or only for DC. if it is appliacable to AC in transformers when voltage increases the voltage decreases ????? why??????????????

13 Answers   Bhel,

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Why and when NGR panel required. Is it necessary to design a NGR panel for a 6.6kV Alternator paralleling with Grid????

0 Answers  

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how to find total current when kva is 30.4 given ? should we use root 3 (1.732) in the formula?

2 Answers  

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SUPPOSE A CIRCUIT BREAKER HAS TRIPPED THE THE LINE WHEN A FAULT OCCUR ON IT.NOW WHEN THE FAULT HAS BEEN CLEARED, HOW THE CIRCUIT BREAKER WILL CLOSE AUTOMATICALLY NOT MANUALLY.

6 Answers   Bureau of Energy Efficiency, DVC,

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What kind of preventive maintenance are there for transformer?

0 Answers   Gulf,

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A 100KVA SINGLE PHASE TRANSFORMER 10000/200V,50HZ REQUIRES 300V AT HV SIDE TO CIRCULATE FULL LOAD CURRENT WITH LV SHORT CIRCUITED.THE INTAKE IS 1000W.THE % OF REGULATION ON FULL LOAD AT 0.8 PF LAGGING WILL BE HOW MUCH AND THE SECONDARY TERMINAL VOLTAGE ON 0.8 PF LEADING WILL BE

0 Answers   IAS, TATA,

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