Buchholz Relay | Construction and Working Principle
Buchholz Relay For a protection of transformer Buchholz relay in transformer is mounted on the connecting pipes between the main tank & the conservative tank. It consists of two element.…
Difference between Synchronous Motor and Induction Motor
The following are the main comparison between Synchronous Motor & Induction Motor Sr. No.Synchronous MotorInduction Motor1.It is not self-starting.It is self-starting motor.2.It runs at a constant speed known as synchronous speed.Its…
Difference Between HVDC and HVAC
HVDC HVDC stand for High Voltage Direct Current. It refers to a system of transmitting electrical power using direct current (DC) at high voltage levels. This method is commonly used…
Moving Iron Instrument | Advantages & Disadvantages
Moving Iron Instrument There are indicating instrument which are used to measure current & voltage. In moving iron instrument the movable system consists of one or more pieces of specially-…
Electrical Resonance Type Frequency Meter
Frequency Meter A frequency meter is a device used to measure the frequency of an electrical signal, which can be an alternating current (AC) power supply, radio waves or any…
PMMC Instrument | Construction & Working | Advantages & Disadvantages
PMMC A permanent magnet moving coil instrument can measure DC voltage & current. The working principle of these instrument is the same as that of the D' Arsonval type of…
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