The document discusses the training provided by MPPKVV Company Ltd, which is divided into four sections over various days: transformer repairing, low transmission meter testing, high transmission meter testing, and 33/11 KV substation. It provides details on each section, including an overview of transformer components, reasons for transformer failure, pre-commissioning transformer tests, and the setup and functioning of a 33/11 KV substation.

1. MPPKVV Company Ltd
Indore
Introduction
The Government of Madhya Pradesh vide order
dated 1st July, 2002 has incorporated Madhya
Pradesh Paschim Kshetra Vidyut Vitaran
Company Limited as a wholly
owned Government of Madhya Pradesh
Corporations under the Companies Act, 1956 to
undertake activities of distribution and retail
supply for and on behalf of Madhya Pradesh
State Electricity Board in the areas covered by
the Commissionaires of Indore and Ujjain.

2. MPPKVVCL Objectives
•The main objectives are to achieving efficiency
gains and making necessary changes to make the
Company commercially viable, progressively self
sustainable and less government dependent and
at the same time, balancing the interest of the
consumers in regard to quality of service and
economical tariff.

3. Whole Training is divided into Four Sections:
• MTRU(Main Transformers Repairing Unit) – 4 Days
• LTMT Lab(Low Transmission Meter Testing Lab) – 4
Days
• HTMT(High Transmission Meter Testing Lab) – 3 Days
• 33/11 KV Substation. – 4 Days

4. M.T.R.U {MAJOR TRANSFORMER REPAIR UNIT}
•Transformer is a static electromagnetic
device which is used to convert electrical
power from one voltage level to another
voltage level without changed in
frequency.

5. Major Components of Power Transformer:
•* Transformer core.
•* Transformer Winding.
•* Transformer HV/LV Bushing.
•* Transformer Oil, Solid
insulation/Paper.

6. Reason of Transformer Fails:-
• Few transformers fail due to old age per se, but rather as a consequence of
external faults, short circuit faults, insulation failure (dielectric failure),
local overheating (causing gassing) or accessory failure (e.g. bushings, tap
changers, coolers, surge-arresters).
• Repairing a transformer instead of replacing can substantially reduce
investment costs and provide a faster turnaround than buying a new
transformer. In repairing old transformers where the manufacturer may no
longer be in existence and/or the design is obsolete and a like for like new
replacement cannot be obtained, there may be significant savings in
infrastructure costs and civil works in using the existing tank and design.
Improper functioning of Protective devices, Poor Earthing, Poor oil values,
Damages of insulation, Weakening of Winding Insulation.

7. TRANSFORMER

8. Remanufacturing vs. Repair
• These words have been used interchangeably. Repairing a
transformer simply means the unit will be returned to the customer
in-kind and perform to its original electrical, mechanical, and thermal
design. This can include, but not limited to, re-winding of the coils, re-
insulating the core, tap changer work, bushing replacement, re-
gasket, cooler refurbishment, install relays, and control cabinet work.
On the other hand, remanufacturing a transformer means a change to
a unit’s electrical, mechanical, and thermal design. This may include,
but not limited to, re-designing the coils to increase MVA, kV and/or
improve short circuit strength, core modifications to address heating
issues or to improve cooling, and tap changer retrofit.

9. Repair/Remanufacturing Focused Factories –
• >30 Years Experience
• * Dedicated “State of the Art” Remanufacturing Facilities
• * Dedicated Engineering, Drafting, and Manufacturing Resources
• * “Cutting Edge” Technology That Meets Present Day New Transformer Standards
• * Remanufacturing Takes Advantage of Design Enhancement & Capacity Upgrade
Possibilities
• * Reverse Engineering Capabilities
• * Transformer Life Renewal/Extension by replacing organic materials and reusing
materials that do not age
• * Advance Design, Material Ordering, and Manufacturing Capabilities. Understanding
of All OEM Designs through hands-on experience – ISO 9001 and 14000 Certified
• * Established Quality Plans

10. REPAIRING UNIT OF TRANSFORMER

11. Type Test of Transformer:-
• Routine Tests of Transformer
• Routine tests of transformer is mainly for confirming operational
performance of individual unit in a production lot. Routine tests are
carried out on every unit manufactured.
• Special Tests of Transformer
• Special tests of transformer is done as per customer requirement to
obtain information useful to the user during operation or
maintenance of the transformer.

12. Pre Commissioning Test of Transformer
• In addition to these, the transformer also goes through some other
tests, performed on it, before actual commissioning of the
transformer at site. The transformer testing performed before
commissioning the transformer at site is called pre-commissioning
test of transformer. These tests are done to assess the condition of
transformer after installation and compare the test results of all the
low voltage tests with the factory test reports.

13. Type tests of transformer includes
• Transformer winding resistance measurement
• Transformer ratio test.
• Transformer vector group test.
• Measurement of impedance voltage/short circuit impedance
(principal tap) and load loss (Short circuit test).
• Measurement of no load loss and current (Open circuit test).
• Measurement of insulation resistance.
• Dielectric tests of transformer.
• Temperature rise test of transformer.
• Tests on on-load tap-changer

14. 33/11 KV Substation
• In this station, high transmission is step down to lower
voltage which is suitable for domestic and commercial
purposes.
• In this substation 33kv voltage is stepped down to 11
kv.
• In substation generally more than one transmission
line is used to increase the reliability. So that in case of
fault in one line other is operate.

15. • Similarly, here two transmission lines are used from Chambal Hydro
Electric Power Station.
• This transmission line are fed to the metering unit for determining the
electric I/P power.
• Then this Lines are fed to the step down transformer via Protection
unit, which consists of Circuit Breaker and Relays.
• Output from the step down transformer is fed to the different
feeders.
• The Controlling of each feeder is done in Control Unit.