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What is PMMC Instrument : Construction & Its Working

September 18, 2021 By WatElectronics

PMMC Device

The various electrical machines and panels are fixed onboard to sail the ship from one place to another place very efficiently and safely. To avoid the breakdown during sailing, these machines require regular maintenance. That means, measuring electrical quantities like resistance, voltage, and current will help to analyze the proper condition of the electrical machine. For this measurement, different instruments are used like a PMMC instrument. PMMC instruments are one of the simple and … [Read more...]

What is Galvanometer – Construction & Its Working

August 20, 2021 By WatElectronics

Galvanometer

After the demonstration of Hans Christian Ørsted in the year 1820 that is, an electric current can turn aside a magnetized needle, the first galvanometer was designed. This device was designed by physicist Johann Schweigger & German mathematician and they named it a multiplier. Basically, a galvanometer includes a needle, connected to a coil so that the coil can move freely in a magnetic field. This field can be created through one or more permanent magnet poles. Once electricity is … [Read more...]

What is Synchroscope : Circuit & Its Working

March 18, 2021 By WatElectronics

Synchroscope

In electrical power systems, a device is needed to measure the angle between any two AC systems like power networks or generators, which are synchronized with each other. To synchronize any two electrical systems, they must be operating at the same frequency at a phase angle of zero degrees. The synchroscope devices are used to measure the frequency and phase angle differences between two AC systems. If these differences are zero, then the two systems can be connected and synchronized with each … [Read more...]

What is Megger : Construction, Working and Its Applications

April 21, 2020 By WatElectronics

Megger

It is quite easy to measure the resistance of a resistor. However, measuring the resistance of an insulator can be a difficult task. This is because the resistance of insulators is extremely high. For that, a device called megger is used which can be used to measure the relatively high value of resistance of insulators. The resistance is measured by comparing the unknown resistance of the insulator to that of the known value of resistance of a material. The circuit comprises two voltage coils … [Read more...]

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