What is GFCI or GFI? A ground fault circuit interrupter, called a GFCI or GFI, is an inexpensive electrical switchgear device that can either be installed in your electrical system or built into a power cord to protect you from severe electrical shocks. Electric shocks can cause severe injury or even death. Even exposure to current as low as 100 ma current for only … [Read more...] about GFCI (Ground Fault Circuit Interrupter) – Working, Types, Installing and Troubleshooting
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
What is a Circuit Breaker? As the name indicates, circuit breaker means the device which breaks (Open) the circuit under the abnormal condition and protects the system from hazards. Keep reading to understand the working principle of circuit breaker. The function of a circuit breaker is to isolate the faulty point of the power system in case of abnormal conditions such as … [Read more...] about What is Circuit Breaker – Working Principle and Arcing Phenomenon
The assembly of the apparatus used to change some characteristic (e.g. voltage, a.c. to d.c., frequency, p.f etc.) of electric supply is called a sub-station. The four major types of substations are explained in this article. Sub-stations are an important part of the power system. The continuity of supply depends to a considerable extent upon the successful operation of … [Read more...] about 4 Major Types of Electrical Substations
It is fair to say that without discriminative protection it would be impossible to operate a modern power system. The protection is needed to remove as speedily as possible any element of the power system in which a fault has developed. So long as the fault remains connected, the whole system may be in danger from three main effects of the fault, namely: it … [Read more...] about Why we need Power System Protection?