Moving Iron Instruments – Attraction and Repulsion Type
The most common ammeters and voltmeters for laboratory or switch-board use at power frequencies are the moving iron instruments. These … Continue Reading
Instrumentation
Permanent Magnet Moving Coil (PMMC) Instrument
The permanent magnet moving coil instrument is the most accurate type of DC measurement. It is one of the two … Continue Reading
Inductors and Inductance : Working, Unit, Function, Types and Uses
Inductors are electrical components that oppose the flow of alternating current (AC) by temporarily storing energy as magnetic fields. The … Continue Reading
Measurement of Three Phase Power | Wattmeter Methods
This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The … Continue Reading
Current Transformer (CT) – Construction and Working Principle
A current transformer (CT) is a type of transformer that is used to measure AC current. It produces an alternating current … Continue Reading
Low Voltage Switchgear
Low voltage switchgear, according to IEC 60947, refers to switchgears with rated voltages up to 1000 V AC and 1500 … Continue Reading
Three Types of Analog Instruments – Indicating, Recording and Integrating
An analog instrument is one in which the output or display is a continuous function of time and bears a … Continue Reading
Solid State Relays (Static Relays)
What is a Static Relay? There are two basic classifications of relays – Electromechanical Relays and Solid State Relays (Static … Continue Reading
Basic Types of Switchgear Components
Before learning about different switchgear components, let us understand what is switchgear. The apparatus used for switching, controlling and protecting … Continue Reading
Swinburne’s Test of DC Machine (Generator and Motor)
Swinburne’s test is the simplest indirect method of testing dc machines. In this method, the dc machine (generator or motor) … Continue Reading