Deepakkumar Yadav
Essentials of a Steam Power Plant Coal based steam power plants are commonly used in India to produce electrical power in central stations since the coal is cheaply available in abundance. These plants are built in the capacity range of 10 MW or even larger capacities. These plants are located at a site where the … Read more
Planning, Design and Layout of High Voltage Laboratory Q. What are the various factors to be considered while designing a High voltage laboratory? High voltage laboratories are an essential requirement for conducting various tests for the equipment. In addition, they are also used in the development work on equipment for conducting research, and for planning … Read more
Introduction to Types of Power Plants Power plays an important role in the working of men whether it is in industry. agriculture, transportation, human comfort etc. The per capita consumption of electrical power reflects on the living standards and prosperity of a nation. Any lack of energy will hamper the economic progress of the country. … Read more
Classification of HV Laboratories (As per Size and Rating) A Small Size Laboratory Medium Size Laboratory 1. A Small Size Laboratory A small size laboratory is one that contains d.c. or power frequency test equipment of less than 10 kW / 10 WA rating and impulse equipment of energy rating of about 10 kJ or … Read more
High voltage motor testing The tests to be conducted on high voltage motors are as below High Voltage DC Test Sustained low Frequency Tests High Frequency Test Surge or Impulse Test High Voltage DC Test A DC voltage about two times of the normal rated voltage is applied across the motor under test. The voltage … Read more
Radio Interference Measurement Due to various reasons the noise voltage is produced such as : Over head conductors subjected to high voltage stresses and abrupt changes in the climatic conditions. Bonding between the porcelain body of the solid insulator fitted on the metallic-pin. Binding of H.V. conductor to the body (grove) of the insulator body … Read more
Power Frequency Test Power Frequency Sparkover Test (Dry and Wet) The test setup is shown in Figure. A standard voltage source is used. This source is connected between live terminal and earth terminal of surge arrester. A voltage of 1.5 times rated voltage is applied to surge arrester consecutively for 5 times. Sparkover should not … Read more
Test of Cables 1. Thermal Duty Test Figure A Figure B For measuring temperature to find temperature rise either thermocouples, self resistance method or thermometer is used: In the above circuit thermocouple is used : In the test circuit a special transformer is used. This transformer has primary 230 V to 440 Volts rating when … Read more
Insulation Resistance Test Megger Test This test is also known as megger test. The Insulation Resistance test is routine test. It is usually done at 300 to 500 V D.C. with 100 to 500 Mega ohm resistance. The test voltage is applied across cable insulation and grounded sheath . The voltage and current is measured … Read more
Power Frequency Test of Cables 1. Power Frequency Voltage Withstand Test Wet and Dry Withstand Test The test is performed in wet and dry conditions separately. Before commencement of the test, the insulator is exposed to artificial rain produced as per IS 2071 (Part 1) – 1974 for at least one minute before application of … Read more