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What will happen to the protection and metering, if the polarity of a single or two PT/PTs in three phase system is reversed? Please provide reference if any.
2237I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR
2051We know flow of electron is current . But why electron flow from negative to positive and current from positive to negative?
4 7813why sometime we get electrical shock while touching the ballon of dish tv connection ? which we should not get.
2039I did oil BDV test of 1600 KVA trafo 20KV/400V as per IEC 156. Result is 1) 58 KV 2) 58 KV 3)40 KV 4) 50 KV 5) 58 KV 6) 18 KV. Avr is 47 KV. Can we say oil is still ok even in the 6th test BDV is 18 KV ?
1 5418Post New Electrical Engineering Questions
What is a differential amplifier? Also, explain cmrr.
Why the dc voltage drop during starting of emergency lube oil pump? The Voltage drop from 135kv to 125 kv for one min. before re-establish to 135kv?
What is the rating of circuit breaker needed for 300 KVA load in 33 KV supply line in a transformer of 33 KV / 415 Volt ?
A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?
Dear friends, i would like to know that what is the exact function of 'exciter winding' & 'aux winding' in Alternator?
What are the two basic types of transformers?
What is the reason for using a GE G101 MCB in place of an EP102 MCB if both are capable of AC circuit protection?
What is meant by positive and negative feedback?
Electrical 'C' license full abbreviation , and full form
Explain the functioning of diode?
what is calculation mathod/formaulla for deciding Size of busbar (Copper/ aluminum)for L.T. panel on Various Fault level like 50kA,25kA,10kA
We are designer please help me calculate the size of 11kv cables from step up transformer to M.V panel, total load is 5 mega watt distance 900 feet (used aluminum type cables) please provided formula for calculate the cable with example.
what is excitation/
explain why core loss of a transformer is almost constant under different load conditions when connected across a constant voltage and constant frequency.
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