This document summarizes the summer training report submitted by four students from Amritsar College of Engineering & Technology at the Punjab State Power Corporation Limited Transformer Repair Workshop in Amritsar. The workshop repairs damaged transformers to save costs compared to the private sector. It has two main circles and aims to repair 120 units per month. The report describes the workshop organization and sections for washing, repairing, drying, assembling, testing and storing transformers. It also explains transformer components, types, workings, efficiency tests and applications.
WHAT IS TRANSFORMER, DEFINE TRANSFORMER, TYPES OF TRANSFORMER, RATINGS OF TRANSFORMERS, MANUFACTURING PROCESS OF TRANSFORMER, PARTS OF TRANSFORMER, TESTS OF TRANSFORMER, COSTING OF COPPER.
WHAT IS TRANSFORMER, DEFINE TRANSFORMER, TYPES OF TRANSFORMER, RATINGS OF TRANSFORMERS, MANUFACTURING PROCESS OF TRANSFORMER, PARTS OF TRANSFORMER, TESTS OF TRANSFORMER, COSTING OF COPPER.
This ppt describes the function of Power Transformer in a Power Generation plant. Here DPL(Durgapur Projects Limited) was our VT venue, so chose it as the Base.
This ppt describes the function of Power Transformer in a Power Generation plant. Here DPL(Durgapur Projects Limited) was our VT venue, so chose it as the Base.
Transformers for Electric Arc-Melting Furnaces with Direct Voltage RegulationJuso Ikanovic
In modern metallurgical and chemical industry there is an
increasing need for electric arc-melting furnaces. Transformer
is also one of the vital parts by which power is supplied to furnaces.
Because of their technological aspects, Electric arcmelting
furnaces, need special transformers different from
usual distribution units. The main problem arises from the demand
for relatively wide range of regulation on the low voltage
side.
In this article one of the many principles of voltage
regulation is described, nomely, low voltage regulation by
means of magnetic flux variations.
POWER TRANSFORMER WINDINGS WITHOUT PAPER INSULATIONJuso Ikanovic
The paper gives a presentation of some most important properties of the enamel insulated rectangular wire windings. The basic paper insulation in the winding conductors is replaced completely by PVA (polyvinyl acetal) of thermal class E (120˚C). Single and double threaded helical windings are considered. The main properties and benefits from the perspective of dielectric, thermal and dynamic strength of the winding are noted.
Verification of dielectric strength and measurements of breakdown voltages of the insulation arrangement of oil and enamel. We conducted tests on models that represent section of real windings. The resulting values of breakdown voltages are considered when designing windings in transformers with enamel insulated wires.
Key words: Power Transformer – Winding – Enamel Insulation – Dielectric strength
DRE New & Refurbished Medical Equipment 2014 CatalogDRE Medical
DRE is a premier surgical and medical equipment supplier that provides a combination of durable new and professionally refurbished equipment to medical professionals around the globe. DRE offers a value to doctors by providing the features and reliability they need while still fitting within their budget.
Our focus is to be a single supplier for all of your major operating room equipment and surgical equipment. Our clients find that with one point of contact, the purchasing process is a much more efficient and pleasant process.
The purpose of the test is to secure that the transformer insulations withstand the lightning overvoltages which may occur in service.The testing is conducted by artificial generation oflightning impulse using IMPULSe GENERATORS
In-Country Training
On
Operation, Maintenance, Protection & Control of 33/11 kV Substation
Project Name: Design, Supply, Installation, Testing & Commissioning of 33/11 kV sub-stations with source end feeder bays.
Contract No: BREB/UREDS/W-01A-001/02/2016-2017
BREB/UREDS/W-01A-002/03/2016-2017
BREB/UREDS/W-01A-004/04/2016-2017
June 3, 2024 Anti-Semitism Letter Sent to MIT President Kornbluth and MIT Cor...Levi Shapiro
Letter from the Congress of the United States regarding Anti-Semitism sent June 3rd to MIT President Sally Kornbluth, MIT Corp Chair, Mark Gorenberg
Dear Dr. Kornbluth and Mr. Gorenberg,
The US House of Representatives is deeply concerned by ongoing and pervasive acts of antisemitic
harassment and intimidation at the Massachusetts Institute of Technology (MIT). Failing to act decisively to ensure a safe learning environment for all students would be a grave dereliction of your responsibilities as President of MIT and Chair of the MIT Corporation.
This Congress will not stand idly by and allow an environment hostile to Jewish students to persist. The House believes that your institution is in violation of Title VI of the Civil Rights Act, and the inability or
unwillingness to rectify this violation through action requires accountability.
Postsecondary education is a unique opportunity for students to learn and have their ideas and beliefs challenged. However, universities receiving hundreds of millions of federal funds annually have denied
students that opportunity and have been hijacked to become venues for the promotion of terrorism, antisemitic harassment and intimidation, unlawful encampments, and in some cases, assaults and riots.
The House of Representatives will not countenance the use of federal funds to indoctrinate students into hateful, antisemitic, anti-American supporters of terrorism. Investigations into campus antisemitism by the Committee on Education and the Workforce and the Committee on Ways and Means have been expanded into a Congress-wide probe across all relevant jurisdictions to address this national crisis. The undersigned Committees will conduct oversight into the use of federal funds at MIT and its learning environment under authorities granted to each Committee.
• The Committee on Education and the Workforce has been investigating your institution since December 7, 2023. The Committee has broad jurisdiction over postsecondary education, including its compliance with Title VI of the Civil Rights Act, campus safety concerns over disruptions to the learning environment, and the awarding of federal student aid under the Higher Education Act.
• The Committee on Oversight and Accountability is investigating the sources of funding and other support flowing to groups espousing pro-Hamas propaganda and engaged in antisemitic harassment and intimidation of students. The Committee on Oversight and Accountability is the principal oversight committee of the US House of Representatives and has broad authority to investigate “any matter” at “any time” under House Rule X.
• The Committee on Ways and Means has been investigating several universities since November 15, 2023, when the Committee held a hearing entitled From Ivory Towers to Dark Corners: Investigating the Nexus Between Antisemitism, Tax-Exempt Universities, and Terror Financing. The Committee followed the hearing with letters to those institutions on January 10, 202
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
Delivering Micro-Credentials in Technical and Vocational Education and TrainingAG2 Design
Explore how micro-credentials are transforming Technical and Vocational Education and Training (TVET) with this comprehensive slide deck. Discover what micro-credentials are, their importance in TVET, the advantages they offer, and the insights from industry experts. Additionally, learn about the top software applications available for creating and managing micro-credentials. This presentation also includes valuable resources and a discussion on the future of these specialised certifications.
For more detailed information on delivering micro-credentials in TVET, visit this https://tvettrainer.com/delivering-micro-credentials-in-tvet/
MATATAG CURRICULUM: ASSESSING THE READINESS OF ELEM. PUBLIC SCHOOL TEACHERS I...NelTorrente
In this research, it concludes that while the readiness of teachers in Caloocan City to implement the MATATAG Curriculum is generally positive, targeted efforts in professional development, resource distribution, support networks, and comprehensive preparation can address the existing gaps and ensure successful curriculum implementation.
How to Add Chatter in the odoo 17 ERP ModuleCeline George
In Odoo, the chatter is like a chat tool that helps you work together on records. You can leave notes and track things, making it easier to talk with your team and partners. Inside chatter, all communication history, activity, and changes will be displayed.
2024.06.01 Introducing a competency framework for languag learning materials ...Sandy Millin
http://sandymillin.wordpress.com/iateflwebinar2024
Published classroom materials form the basis of syllabuses, drive teacher professional development, and have a potentially huge influence on learners, teachers and education systems. All teachers also create their own materials, whether a few sentences on a blackboard, a highly-structured fully-realised online course, or anything in between. Despite this, the knowledge and skills needed to create effective language learning materials are rarely part of teacher training, and are mostly learnt by trial and error.
Knowledge and skills frameworks, generally called competency frameworks, for ELT teachers, trainers and managers have existed for a few years now. However, until I created one for my MA dissertation, there wasn’t one drawing together what we need to know and do to be able to effectively produce language learning materials.
This webinar will introduce you to my framework, highlighting the key competencies I identified from my research. It will also show how anybody involved in language teaching (any language, not just English!), teacher training, managing schools or developing language learning materials can benefit from using the framework.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
This slide is special for master students (MIBS & MIFB) in UUM. Also useful for readers who are interested in the topic of contemporary Islamic banking.
Digital Artefact 1 - Tiny Home Environmental Design
Transformer Repair Workshop Report [EEE]
1. AMRITSAR COLLEGE OF ENGINEERING & TECHNOLOGY
TRAINING REPORT
Submitted in partial fulfillment of the requirement for the award of
Degree in
ELECTRICAL AND ELECTRONICS ENGINEERING
BY
Punjab Technical University
Jallandhar
Submitted to:- Submitted by:-
Er. Ajaypal Singh Atinder Pal Singh Virk
Om Prakash
Narinder Sharma
Neeraj
2. A
SUMMER TRAINING
REPORT ON
PUNJAB STATE POWER CORPORATION LTD.
TRANSFORMER REPAIR WORKSHOP
AMRITSAR
A
Summer training Report Submitted
In Partial Fulfillment of the Requirements
for the award of Degree of
Bachelor of Technology
In
Electrical & Electronics Engineering
By
Atinder Pal Singh Virk
Om Prakash
Narinder Sharma
Neeraj
3. Punjab State Power Corporation Limited
Workshop Organization Headed by Chief Engg. Of
Workshop = Iqbal Singh
Aim – To repair damaged Transformer at cheap rates
instead of paying high amounts to privates
sectors
2 major circles = Amritsar [4] , Patiala [8]
Working = Monthly target to repair 120 units
25 KVA = 1 unit
63 KVA = 1.5 unit
100 KVA = 2 unit
200 KVA = 4 unit
Introduction to Organisation
6. A transformer is a Static
device, which transfers
electric power from one
circuit to another.
Does so without change
of frequency.
Has voltage at the recei-
-ving end lower or higher
from the supply circuit.
7.
8. Working Principle:- The main principle of operation of
a transformer Faraday’s law of
electromagnetic induction
According to Faraday’s law,
“Rate of change of flux linkage with respect to time is
directly proportional to the induced EMF in a conductor
or coil".
9. A transformer consists of a rectangular core
of soft iron in the form of sheets (.35mm to
.5mm for 50Hz to 25Hz frequency).
Two separate coils of insulated wires, a
primary coil and a secondary coil are wound
on the core. These coils are well insulated
from one another.
10. Core Type
In this type of
T/F the winding
surround the major
part of core.
Shell Type
In this the core
surround the
major part of the
winding
11.
12. There are generally two types of
transformer
Step up transformer
Step down transformer
Some important types are given as:
Auto-transformer
Poly-phase transformer
Leakage transformer
Resonant transformer
Instrument transformers
13. A step up transformer
is a device that
converts low
alternatic voltage to
high alternating
voltage.
In another word, a
transformer in which
Ns>Np that is called
step up transformer.
14. A step down
transformer is a
device that
converts high
alternatic voltage
to low alternatic
voltage.
In another word, a
transformer in
which Np>Ns that
is called step down
transformer.
15. An autotransformer
with a sliding brush
contact
An autotransformer
has only a single
winding with two
end terminals, plus
a third at an
intermediate tap
point.
16. For three-phase
supplies,
A bank of three
individual single-
phase
transformers can
be used,
OR all three
phases can be
made as a single
three-phase
transformer.
17. Current transformers,
designed to be looped
around conductor.
A current transformer
is a measurement
device
provide a current in its
secondary coil
proportional to the
current flowing in its
primary.
18.
19. BUCHHOLZ RELAY: It is a very
sensitive gas and oil operated
instrument which safely detect
the formation of gas or sudden
pressure inside the oil transformer.
CONSERVATOR:- It is used
to provide adequate space
for the expansion of oil when
transformer is loaded or when
ambient temperature changes
20. TANK:- Basically this is a container
used to keep windings and insulation
oil. The tank is Made up of Mild
Steel.
SILICA GEL BREATHER:It absorb
the moisture from the air. it is a
chemical material these are the
only one main component inside
the breather basically silica gel is
a brown colored one after the
absorption silica gel become pink
21. OIL LEVEL INDICATOR: It is used
to show the oil level in the transfor-
-mer. this is a ordinary part situated
on the side of the conservator for
proper oil checking oil tank wants a
specific amount of oil.
RADIATORS:- These are used for
the purpose for the cooling of the
transformer oil. The oil circulates
all the time from these radiator
parts
22. Winding temprature indicator: used to
show the temperature of transformer
winding.
TEMPERATURE METER (O.T/W.T):
These are used for taking the readings of
O.T.I - Oil Temperature Indicator and W.T.I
- Winding Temperature Indicator
Tap-changer: This is used for the tapping
of the Transformer at different levels.
23. WINDINGS
PRIMARY WINDING - In the case of power
transmission primary windings are the
main element external connection from
the power is connected to the winding.
SECONDARY WINDING - This is a another
winding for reducing power (in the case of
step down purpose) .
M
Primary Wining Secondary Wining
24. This is a outer unit, this is used to
prevent unwanted leakage of
electricity.
26. Transformer Workshop Yard (TWY):- The
damage transformers are received here. All types of
transformer of 25KV, 63kv, 100kv and 200kv rating
received in damage condition.
Transformer Repair Workshop Store (TRWS),
Tank & Washing:- In this section the power oil &
windings taken out from the Tank and blank tank is
send for washing in washing section
Repairing Section: In this
section damage windings are
repaired if all windings are
burnt then whole windings
were replaced with new
windings.
27. The core shown in fig. is made of
Silicon steel with thickness 0.35 to
0.5mm. These laminated core legs
are tighten with white tape. So,
that the flux in the coils will linked
properly with the other coil.
The channel's shown in IInd fig.
are also use tighten the core and
Also fix the whole set of core and
Windings in the tank. The main
difference required between the
channel and windings should at
least 16-20mm which can be
increased or decreased according
to the requirement.
28. It is noted that for 25KV, 63KV, 100KV, 200KV
or any Rating Transformer the turn ratio will
not less than 43780 and not more than
44220.
Connections:- The distribution transformer
connection always in star- delta
connections means the connections of
Primary are in Delta connections and the
connection of Secondary in Star Connections.
29. Core Ovening Section:- Core ovening
section is the most important part of
repairing transformer.
This is used to remove the moisture from
the core and windings of the transformer. In
this the core is placed inside the oven at 40-
60C temp in Summer season and 100-120C
in Winter season.
30. BOXUP Section:- This is the section where the core
is placed inside the Tank and core is fixed inside the
core and all outer connections were made the
LT and HT were first fixed with
the Brass made rods and then
that rods were fixed with Porc-
-elain Brushes .
Dehydration Filling Section:- The oil used in the
transformer are Power oil or Mineral oil. It provides
cooling to the transformer. Before filling the oil in the
transformer it is heated at 60KV/minute means 60KV
is applied to the oil for one minute in oil testing
machine. If the oil is withstand with this voltage then
it is further used for filling.
31. Pre Testing:- In this everything is tested like IR
value, the oil Temp like after filling the oil in tank it
is again tested with 40KV/min. The requirement is
25KV/min but for overload safety purpose it is
tested at 40KV/min.
Final Testing :- The final testing is divided into
four parts
(a) HVHP (High Voltage & High Pressure)
(b) DVDF (Double Voltage Double Frequency)
(c) No Load Losses
(d) Full Load Losses
32. Maximum Transformer
Efficiency
The efficiency varies as with respect to 2 independent quantities
namely, current and power factor
Thus at any particular power factor, the efficiency is maximum if
core loss = Iron loss .This can be obtained by differentiating the
expression of efficiency with respect to I2 assuming power factor, and
all the voltages constant.
At any particular I2 maximum efficiency happens at unity power factor.
This can be obtained by differentiating the expression of efficiency
with respect to power factor, and assuming I2 and all the voltages
constant.
Maximum efficiency happens when both these conditions are satisfied.
33. Losses
Iron or core losses – caused by alternating flux
in core
Hysteresis losses – During each A.C. cycle current
flows which magnetize and demagnetize the core. As a
result of which energy is lost in each cycle
Eddy Current losses – Due to consequent heating of
material it results in loss of power
Copper losses or ohmic losses - Due to ohmic
resistance in transformer winding
Small losses which are mostly neglected
Stray load losses – leakage field induces Eddy
currents in tank walls , bolts etc.
Dielectric losses - occurs in insulation material
basically in oil and solid insulation
34. Open circuit Test
It is used to determine Lm1 (Xm1)and Rc1
Usually performed on the low voltage side
The test is performed at rated voltage and frequency under
no load
35. Short circuit Test
It is used to determine Llp (Xeq) and Rp(Req)
Usually performed on the high voltage side
This test is performed at reduced voltage and rated frequency
with the output of the low voltage winding short circuited such
that rated current flows on the high voltage side.
36. For Voltage Step Up
For Voltage Step Down
Amplifying Systems
Loud Speakers