Jignesh Parmar
74 awesome technical articles
Jignesh Parmar has completed M.Tech (Power System Control), B.E (Electrical). He is member of Institution of Engineers (MIE), India. He has more than 20 years experience in transmission & distribution-energy theft detection and maintenance electrical projects.
What is HIPOT Testing (Dielectric Strength Test)?
Hipot Test is short name of high potential (high voltage) Test and it is also known as Dielectric Withstand Test. A hipot test checks for “good isolation.” Hipot test makes… Read more
Dec 22, 2011 | By jiguparmar
Earthing in electrical network – purpose, methods and measurement
The main reason for doing earthing in electrical network is for the safety. When all metallic parts in electrical equipment are grounded then if the insulation inside the equipment fails… Read more
Dec 19, 2011 | By jiguparmar
Guideline to Design Electrical Network for Building (Small Area)
Find out built up area in Sqft.of per flat per House/Dwelling unit. Multiply area in Sqft. by Load/Sqft according to following table: Type of Load Load/Sqft Industrial 100 Watt/Sqft Commercial… Read more
Dec 02, 2011 | By jiguparmar
Demand Factor-Diversity Factor-Utilization Factor-Load Factor
Originally published at Electrical Notes – Articles Demand Factor = Maximum demand of a system / Total connected load on the system Demand factor is always less than one. Example:… Read more
Nov 14, 2011 | By jiguparmar
Working Principle of Earth Leakage Circuit Breaker (ELCB) and Residual Current Device (RCD)
Earth Leakage Circuit Breaker (ELCB) is a device used to directly detect currents leaking to earth from an installation and cut the power and mainly used in TT earthing systems…. Read more
Nov 07, 2011 | By jiguparmar
What is the difference between MCB, MCCB, ELCB, and RCCB
Rated current not more than 100 A. Trip characteristics normally not adjustable. Thermal or thermal-magnetic operation. Rated current up to 1000 A. Trip current may be adjustable. Thermal or thermal-magnetic… Read more
Oct 25, 2011 | By jiguparmar
Neutral system – Single earthed or Multi earthed?
In distribution system three phase load is unbalance and non linear so the neutral plays an very important role in distribution system. Generally, distribution networks are operated in an unbalanced… Read more
Oct 13, 2011 | By jiguparmar
Complete overview of lightning arresters (part 3)
Continued from article Complete overview of lightning arresters (part 2) There are several types of lightning arresters in general use. They differ only in constructional details but operate on the… Read more
Oct 08, 2011 | By jiguparmar
Complete overview of lightning arresters (part 2)
Continued from article Complete overview of lightning arresters (part 1) Surge arresters are devices that help prevent damage to apparatus due to high voltages. The arrester provides a low-impedance path… Read more
Sep 29, 2011 | By jiguparmar
Complete overview of lightning arresters (1)
Lightning can create voltage surges in several of the following ways. Lightning can score a direct hit on your house. It can strike the overhead power line which enters your… Read more
Sep 23, 2011 | By jiguparmar
Types Of Electrical Power Distribution Systems You Should Know About
Electrical power is distribution either three wires or four wires (3 wire for phases and 1 wire for Neutral). Voltage between phase to phase called Line Voltage and voltage between… Read more
Sep 19, 2011 | By jiguparmar
How reactive power is helpful to maintain a system healthy
We always in practice to reduce reactive power to improve system efficiency. This are acceptable at some level, if system is purely resistively or capacitance it make cause some problem… Read more
Aug 29, 2011 | By jiguparmar
Difference between Power Transformer and Distribution Transformer
Power transformers are used in transmission network of higher voltages for step-up and step down application (400 kV, 200 kV, 110 kV, 66 kV, 33kV) and are generally rated above… Read more
Aug 27, 2011 | By jiguparmar
How to save electrical energy at home
In our home we use lot of electrical equipment like TV, Freeze, Washing machine, Mp3 player, music system, computer laptop. But we have not adequate knowledge for how to use… Read more
Aug 23, 2011 | By jiguparmar