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Certified Transformer Winding Mechanic

How It Works

  1. 1. Select Certification & Register
  2. 2. Receive a.) Online e Learning Access (LMS)    b.) Hard copy - study material
  3. 3. Take exam online anywhere, anytime
  4. 4. Get certified & Increase Employability

Test Details

  • Duration: 60 minutes
  • No. of questions: 50
  • Maximum marks: 50, Passing marks: 25 (50%).
  • There is NO negative marking in this module.
  • Online exam.

Benefits of Certification

Rs.3,499 /-

Vskills has developed a new strategic framework for Skill Development for early school leavers and existing workers, especially in the unorganized sector to improve their employability called Trade Employable Skills (TES).

Trade Employable Skills does effective assessment and certification of candidates in different trade disciplines like Electrical, Electronics, Agriculture, Chemical, Automobile, IT, etc to make them job ready.

Why should one take this certification?

To demonstrate clear understanding and practical aspects and to get a visible recognition for this knowledge.

Table of Content:

Practice Test

Companies that hire Transformer Winding Mechanic

All small and medium companies need certified employees who have the requisite skills. There are more jobs opening up in the economy on a regular basis with the fast growth of the country.

Apply for Certification

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Transformer- principle and construction

  • Working principle of a transformer
  • An ideal transformer
  • Theory of on-load operation
  • Construction

Voltage regulation of transformers

  • EMF Equation
  • Transformation Ratio

Measurement of losses in a Single phase transformer

  • Open circuit of a single phase transformer
  • Short circuit test of a single phase transformer
  • Parts and construction of a Transformer
  • Primary Winding
  • Secondary Winding
  • Transformer Tank
  • Temperature gauge
  • Explosion vent
  • Conservator
  • Function of conservator
  • Breather
  • Tap-changer
  • Buchhoiz relay
  • Cooling Tubes
  • Inlet valves and outlet valves
  • Losses in a transformer
  • Copper Losses
  • Iron losses
  • Eddy current loss
  • Hysteresis loss
  • Efficiency of a transformer

Transformer on load

  • Transformer with resistance and leakage reactance
  • Voltage regulation

Testing and Commissioning of three-phase transformer

  • Testing of power transformer
  • Preliminary tests are
  • Core insulation
  • Core loss test
  • Check of ratio polarity
  • Preliminary load loss and impedance voltage
  • Final tests
  • Routine tests
  • Type tests

Three-phase transformer connections

  • Star/star connection
  • Star-Delta
  • Types of insulation testers
  • Range of magneto-generator type insulation tester

Voltage regulation of three-phase transformers

Transformer Winding

  • Causes of breakdown
  • Principal object of maintenance
  • Factors affecting the life of transformers
  • Effect of moisture
  • Effect of oxygen
  • Effect of solid impurities
  • Effect of varnishes
  • Effect of Windings
  • Maintenance procedure
  • Safety precautions
  • Breather
  • Plain Breather
  • Silica gel breather
  • Gaskets

Transformer oil and testing

  • Necessity of transformer oil
  • Causes for deterioration of transformer oil
  • Testing of transformer oil
  • Field test of insulating oil
  • Crackle test of transformer oil
  • Dielectric test of transformer oil

Auto Transformers

  • Construction
  • Dimmer Stat or variac

Wind a small transformer

  • Record the data
  • Procedure of rewinding a transformer
  • Coil winding machine
  • Turn indicator
  • Wire-feed control arrangements or setting pitch
  • Coil length setting or layer Width setting
  • Mandrel
  • Wire size and turns
  • Stampinsgs
  • Testing of transformer after rewinding
  • Insulation resistance test
  • Load test
  • Short circuit test

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