Skip to main content

Featured Post

Induction Motor Interview Questions with Answers | Part-1

4 comments

Transformer Faults

Transformer Faults

Transformer
Transformer Faults

There are many faults can occur in power transformer which is mentioned below:

  • 1.Over heating of the core
  • 2.Improper contacts on the tap changer
  • 3.Failure of the cooling system
  • 4.Phase to phase fault
  • 5.Earth fault
  • 6.Inter turn fault
  • 7.Over load
  • 8.Over voltage

The effect of all Faults is described below:

1. Over heating of the core

Transformer core gets over heated due to excessive loading, failure of the cooling system
or fault in the core. e.g. shorting of lamination.

Transformer faults
Over heating of the core


Due to this, the life of the insulation
is reduced and so the life of transformer is reduced.

2. Improper contacts on the tap changer

Arcing occurs and the insulation is damaged when the contacts of the tap changer are not proper.

3. Failure of the cooling system

Cooling is affected when cooling fan stops working or there is fault in the circulating system.


Due to this the temperature of the core and winding increase which affects the insulator.


There is possibility of explosion or fire.

4. Phase to phase fault

Transformer Faults
Phase to Phase Fault in Transformer

5. Earth fault


6. Inter turn fault

The phase to phase fault, earth fault and inter turn fault can result due to the defect in insulation. 

Transformer Faults
Inter turn fault in Transformer


Excessive current flows due to this fault and further damage results. Possibility of inter turn fault is less.


If sorme turns of the same winding are shorted, the current increases and heating also increases.This causes unbalanced loading also.

7. Over load

Rate of heating increases when the load on transformer increases.So the winding and its
insulation is damaged.

8. Over voltage

Insulation gets punctured due to over voltage caused by surges. Due to this other faults
can result.

May You like to read this article 👇👇

Labels:

Comments

  1. Latifur RahamanAugust 24, 2019 at 10:30 PM

    really it is very good and very informative for us and it is to help more of people so you write an article for us and we will read that article really it is very very very very good keep it up

    ReplyDelete
  2. World Of Electrical EngineeringAugust 27, 2019 at 4:47 PM

    I try to write more article better than the this article so all can easily understand..

    ReplyDelete
  3. UnknownApril 4, 2020 at 12:06 PM

    Thank you

    ReplyDelete
  4. UnknownMay 4, 2020 at 9:44 PM

    Thank you

    ReplyDelete
  5. UnknownMay 12, 2020 at 10:54 PM

    Thank you sir for your beautiful topic

    ReplyDelete
  6. BobmbeweApril 14, 2021 at 9:35 AM

    Useful info

    ReplyDelete

Post a Comment

Popular posts from this blog

MarX Generator

MarX Generator | High voltage pulse generator Marx Generator - High voltage pulse generator What is MarX Generator? Marx Generator is Electrical circuit which used for generate high voltage pulse. Marx generator is same as like voltage multiplier circuit. First watch the video of marx generator.. Marx Generator produce high voltage Spark as like lightning. Now learn how to make marx generator... Circuit Diagram of marx generator circuit is shown in below image. Circuit Diagram of marx Generator Here, First capacitor are connected in parallel. When DC supply is applied, capacitors charge through resistor by voltage Vc. Spark gaps use as a switch, Here first spark gap voltage is greater than the voltage Vc. So spark gaps are behave as a open circuit during capacitor charge. Now to generate high voltage pulse, The first spark gap need to be breakdown. So, By breakdown spark gap will be short circuit an...
4 comments
Read more

Variable Inductance Transducer | Classification Of Variable Inductance Transducer

Variable Inductance Transducer | Classification Of Variable Inductance Transducer Variable Inductance Transducer | Classification Of Variable Inductance Transducer These are based on a change in the magnetic characteristic of an electrical circuit in response to a measurand which may be displacement, velocity, acceleration etc. Variable inductive transducer may be classified as follows: 1.Self-generating type In this type voltage is generated because of the relative motion between a conductor and a magnetic field. These may be further classified as follows: (A)Electromagnetic type (B)Electrodynamic type (C)Eddy current type 2.Passive type In this type the motion of an object results in change in the inductance of the coils of the transducer. These may be further classified as follows: (A)Variable reluctance (B)Mutual inductance (C)Differential transfer type 1.Self-generating Type (A)Eleotromagnetic t...
1 comment
Read more

Induction Motor Interview Questions with Answers | Part-1

Induction Motor Interview Questions with Answers | Part-1 Induction Motor Interview Questions with Answers | Part-1 Q.1 The frame of an induction motor is made of (A) aluminium (B) silicon steel (C) closed grained cast iron (D) stainless steel (E) bronze Answer:  (C) closed grained cast iron Q.2 The stator frame is an induction motor is used to (A) hold the armature stampings in position (B) ventilate the armature (C) protect the whole machine (D) provide return path for flux Answer:  (A) hold the armature stampings in position Q.3 The stator core of a 3 phase induction motor is laminate in order to reduce the (A) eddy current loss (B) hysteresis loss (C) both hysteresis and eddy current loss (D) weight of the stator (E) windage and friction losses Answer: (A) eddy current loss Q.4 An induction motor works with (A) dc only (B) ac only (C) ac and dc both (D) none of these Answer:  (B) ac only Q.5 Which of the following statement associated with polyphase induction motor is...
4 comments
Read more