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Hi My dear all Friends, There is a question regarding HVAC Engineering and widely used in Power Projects. Question- What is the diffrence Between REF, SEF and Differential Protection....???? Where REF - Restricted Earth Fault SEF - Senstive Earth Fault.
2128Hi My Dear All Friends, There is one question it is widely used in Power Project's High Voltage Engineering. Question- What is the diffrence between Earth fault and Back up Earth Fault....???? . . . . . . Have A Good Day
1 3878During Load testing of battery charger with temporary AC Generator .When reach 70% load Generator immediately shutdown .we could not able to Recognize ,what is exactly problem .Please kindly clarify us
1 3089When we are working on transformer(132\11KV). we are going to isolate the transformer from both HV side and LV side. then we are applying grounding on both side. My question is that we required to isolate the VT which is still connected from secondary side.?
1 3957i am iti student i have project to do. that IS 100MW 220\33KV SUBSTATION I WANT TO KNOW HOW TO START, LIKE CALCULATION, WHAT RATING OF CT,CVT, PT, ISOLATOR LIGHTING ARRESTER WAVE TRAP CIRCUIT BREAKER IN 22OKV SIDE, ALSO TO WARDS 33KV SIDE PLS HELP ME WITH THIS, THIS MY LIFE NOW, I KNOW AUTOCAD, I LIKE TO KNOW HOW TO CALCULATE ALL THE THINGS
3 5193CONSIDER A 415V/200V STEP DOWN TRANSFORMER.CAN WE USE USE IT AS STEP UP TRANSFORMER BY GIVING 200V IN SECONDARY AND TAKING OUTPUT FROM PRIMARY?
3 5243What should be the magnetic balance test values for a 3 phase delta/star connected single primary dual secondary winding transformer (90 MVA / 2 X 45 MVA TRANSFORMER)
1848Post New Electrical Engineering Questions
why on delay timer used for fully automatic star delta starter?
Dear sir, In our plant have Station Transformer having capacity,i want to know, why LV side 40 - 40MVA is given? & how we can get 6.3 KV supply from tertiary(i.e. Open delta connection), Vector Group YNyn0 - yn0 +d MVA Rating 80MVA / 40 - 40MVA + 26.7MVA Voltage rating 420 (Tap range +6,to -10)81.25% /11.5KV - 11.5KV +6.3KV
write a program that prints prime numbers from 1-20 in digonal form
why magnetising curve not start with zero voltage?
What is meant by short-pitched winding?
What is the rating factor for copper cable ( Specific value according to the type of laying ) & the voltage drop?
Is there any question in the name of Static Switch in UPS??
Is any AC drive(VFD) had a feature of DC injection braking? if available please mention the detail. i.e drive can supply braking torque when the motor in idle state.
What is conventional thermal current (Ith)
hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji
what are the principles of a booster converter?
Explain using drawings what is reverse PID action w.r.t PID controllers.
Why mostly the HV side of transformer has Delta?
WHAT IS DEGREE OF COMPOUNDING IN D.C MACHINE MEANS? HOW TO READ THE OPERATING CHART FOR ANY ELECTRICAL MACHINES?
Explain Energy and Power signals?
