Technical Editor, Author at Polytechnic Hub

Introduction of CRO (cathode ray oscilloscope)

The most versatile tool which can be used for the development of electronic circuits and systems is the Cathode ray oscilloscope. It allows the amplitude of electrical signals, whether they…

Technical Editor January 24, 2018

Electrical Articles

Comparison between analog wattmeter and digital wattmeter

Analog Wattmeter Digital Wattmeter Due to moving parts there are losses and friction at bearings. As there are no moving parts,mechanical losses are reduced. Accuracy is less compared to digital…

Technical Editor January 24, 2018

Electrical Articles

Electro dynamometer type wattmeter

These are basically moving coil instruments. In these instruments, the operating field is produced by the fixed coil instead of a permanent magnet. The instruments in which the operating field…

Technical Editor January 23, 2018

Electrical Articles

Comparison between moving-iron (M.I) instruments and moving-coil( M.C)instruments

M.I Instruments M.C Instruments It can be used for a.c as well as d.c voltage and current measurement. It is suitable only for the d.c voltage and current measurement. Less…

Technical Editor January 23, 2018

Electrical Articles

Qualities of measuring instrument

Following are the qualities of measuring instruments : Accuracy It is the closeness with which an instrument reading approaches the true value of the quantity under measurement or it is…

Technical Editor January 20, 2018

Electrical Articles

Compare between indoor substation and outdoor substation

Indoor substation Outdoor substation Less because all the components are insulated.therefore clearance required between them is less. More as some components such as bus bar, O.H. line are not insulated…

Technical Editor January 18, 2018

Electrical Articles

H type cables

These type of cable was invented by H. Hochstadter and hence the name is given the name is given. It consists of three cores and each core is insulated by…

Technical Editor January 18, 2018

Electrical Articles

Electrical equipment of thermal power plant

Electrical equipment used in thermal power plant : Alternators Transformers Switchgear Exciter Alternators Each alternators is coupled to a steam turbine & converts mechanical energy of the turbine into electrical…

Technical Editor January 17, 2018

Electrical Articles

What is generation of electrical energy?

Generation of electrical energy : The conversion of energy available in different forms in different form in nature into electrical energy is known as generation of electrical energy. Energy is…

Technical Editor January 16, 2018

Electrical Articles

Write different parts of boiler

The main parts of boiler are as follows: Combustion chamber : Combustion of fuel takes place in the combustion chamber consequently heat is generated and traned to the water in…

Technical Editor January 14, 2018