why transformer is giving some humming noise .....?
Answer Posted / sureshreddy gummadi
DUE TO MAGNETOSTRICTION IT HAPPENS COZ WHEN FERROMAGNETIC
MAG TRANF CORE IS MAGNETISED THE CORE LENGTH ALTERNATIVELY
INC N DECR N HENCE TRANSFORMER CORE DIMENS INC N DECR
SLIGHTLY
HIGHER THE CORE FLUX HIGHER IS THE HUMMING NOICE N IT
DEPENDS ON NATURE OF CORE CONSTRUCTION N CLAMPINMG
| Is This Answer Correct ? | 14 Yes | 2 No |
Post New Answer View All Answers
Has someone here done a sizing for a generator (3 phase), its for a pumping station. If you have an example for standby/duty and both running (I) star delta (ii) Soft Starter.
plz send me the syllabus or any sample paper for engineer trainee recruitment if any,on ravinder911@yahoo.com
Please elaborate th´evenin’s theorem?
What is the reason for using a GE G101 MCB in place of an EP102 MCB if both are capable of AC circuit protection?
Is it possible to download the Siemens Selection Chart(TYPE 2 coordination) for 1) fuseless selection 2)Fuse selection
What is relation between mu(nought) and epsilon(nought)?
Explain the fundamental difference between emf (electro motive force) and pd (potential difference) ?
TCS IS IT COMPANY THEN WHY DO THEY NEED ELECTRICAL &ELECTRONICS ENGINEERS?
What are PLC leader logic program method
What is given by the definition in BIL IMP/PF = 950/395 kV. This was found in a name plate of a power transformer.
Is there a possibility to use such a treshold voltage for the NMOS part of a CMOS circuit that during the switching it will start conducting only after the PMOS part will be already closed, by this eliminating the leakedge current? Please note, I'm not asking about the well bias in standby mode, but about the "antileakedge" measures during normal operation.
Why the efficiency of generator is more than motor in swinburne's test
Which Class insulation is prefered for the sandwich Busducts ? Why?
A ii kv 1200 A Breaker combination fixed in a cubicle. How many ampere Fuse is required? If fuse is not using, Why?
A ray hit a smooth regular surface at an angle of 20 from the normal. Calculate : 1. The angle btw the incident and reflection ray. 2. The angle of deviation.