This article explains the measurement of three-phase power in star connected or delta connecter load using the wattmeter methods. The power in a three phase load can be measured by following methods: Three wattmeter method Two wattmeter method One wattmeter method The name of these methods indicates the number of wattmeters used in the measurement of … [Read more...] about Measurement of Three Phase Power | Wattmeter Methods
Instrumentation
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 (AC) in its secondary which is proportional to the AC current in its primary. Current transformers, along with voltage or potential transformers are Instrument transformer. Current transformers are designed to provide a scaled-down replica of the current … [Read more...] about Current Transformer (CT) – Construction and Working Principle
Low Voltage Switchgear
As per IEC 60947, switchgears with rated voltages up to 1000 V ac and 1500 V dc are termed as low voltage switchgear. The term ‘switchgear’ is a generic term encompassing a wide range of products like circuit breakers, switches, switch fuse units, off-load isolators, HRC fuses, contactors, earth leakage circuit breakers (ELCBS), miniature circuit breakers (MCBS), and moulded … [Read more...] about Low Voltage Switchgear
Three Types of Analog Instruments
An analog device is one in which the output or display is a continuous function of time and bears a constant relation to its input. The analog instruments find extensive use in present-day applications although digital instruments are increasing in number and applications. The areas of application which are common to both analog and digital instruments are fairly limited at … [Read more...] about Three Types of Analog Instruments
Electric Potential, Potential Difference and EMF
In this article, you will study what are electric potential, the potential difference (PD) and electromotive force (emf) and the difference between them. Just as a body raised above the ground has gravitational potential energy, similarly, a charged body has electric potential energy. When a body is charged, work is done in charging the body. This work done is stored in the … [Read more...] about Electric Potential, Potential Difference and EMF
