Interested to Buy Any Domain ? << Click Here >> for more details...
Why no-load primary current is very small
as compared to full load current in transformer (as 1% of
full load current?
- 5 Answers
- 21253 Views
- NTPC, I also Faced
- E-Mail Answers
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
What is the difference between hot and cold loop testing?
Define what is power quality meter ?
plz send me the procedure and syllabus for mseb exam
Define resonant frequency?
How you will determine the volume of oil in a particular Distribution transformer.
If we impress a dc voltage of 230 V on an unloaded 230 V, 50 Hz transformer it wi A give high secondary voltage B burn out C give secondary voltage as per K D none of these
why is the power generator connected as star earthed or star earthed through reactance and what its features ?
what is the difference between dry and wet type of 132kV terminations. which one is durable
What is the maximum percentage voltage drop (vd%)for a motor control center
If increased the frequency up to 1000 then what changes shows in voltage?
What is meant by Low Resistance Cable and High Resistance Cable.
Define conversion efficiency of a power amplifier.
what is the Pickup/drop off ratio in BCPU relays
Which type of a.c motor is used in the fan (ceiling fan, exhaust fan, pedestal fan, bracket fan etc) which are find in the houses ?
what is the best transformer oil breakdown voltage?
