Why no-load primary current is very small
as compared to full load current in transformer (as 1% of
full load current?
Answer Posted / jonathan r. lambert
Normally, when power is applied to a transformer the
resulting primary current will be the vector sum of the
primary impedance and the reflected (turns ratio squared)
secondary impedance. However, since the secondary impedance
is infinite at no-load the reflected secondary impedance
will not influence the primary current and the primary
current will be the result of only the primary circuit
impedance. This no-load primary current is referred to as
the primary magnetization current and represents the
current used to excite the transformer's magnetic field
that links the primary and secondary windings - typically
1% to 5% of the full rated load current. Applying a load to
the transformer secondary will result in a primary current
with two components, the reflected secondary current and
the primary magnetization current.
Is This Answer Correct ? | 34 Yes | 11 No |
Post New Answer View All Answers
TYPE'S OF BREKAR ,WHAT IS TRANSFORMAR & SAFTY. STARTER DOL & STAR DELTA STARTER.
wHAT IS CAPACITANCE LATCHING? hOW TO CALCULATE CAPACITANCE LATCHING? hOW TO SOLVE THE PROBLEM IF CAPACITANCE LATCHING APPLIED?
I want the details about BHEL company examination.Can anyone able to help me please.
Why different Pressure switch used in marine boiler water circulation system
how to calculate power consumption in slip ring motor at different step
why we use circuit breakers for switching instead of normal switching device?
Wind mill
What happened if C.T mount at any cable or Bus bar in wrong direction . C.T going on proper work or not . C,T direction is essential thing to properly work.
Dear Brother can u tell the proper size selection of cable & the fault level calculation of braker, busbar etc. pls mail me at azeemk30@gmail.com
what are factors to be consider to design a HT & LT motor?
do we use links in a dc circuit?if so what s its use in it?
What aturn on methods of scr?
How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.
When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number
Why we do 2 types of earthing on transformer (ie:)body earthing & neutral earthing , what is function. I am going to install a oo kva transformer & 380 kva dg set what should the earthing value?